Applied Chemistry for Engineering (공업화학)

The Korean Society of Industrial and Engineering Chemistry (한국공업화학회)
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Recent Progress in Carbon-Supported Single-Atom Catalysts

탄소 지지체 기반 단일 원자 촉매 연구 동향

  • Ingyeong Bae (Department of Industrial Chemistry, Pukyong National University) ;
  • Jiwang Noh (Department of Industrial Chemistry, Pukyong National University) ;
  • Sunkyu Kim (Department of Industrial Chemistry, Pukyong National University)
  • 배인경 (국립부경대학교 공업화학.고분자공학부 공업화학전공) ;
  • 노지왕 (국립부경대학교 공업화학.고분자공학부 공업화학전공) ;
  • 김선규 (국립부경대학교 공업화학.고분자공학부 공업화학전공)
  • Received : 2024.10.19
  • Accepted : 2024.11.18
  • Published : 2025.02.10
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Abstract

Carbon-supported single-atom catalysts (SACs) are widely used in heterogeneous catalysis owing to their high activity and selectivity. This study reviews various carbon materials including carbon black, mesoporous carbon, and carbon nanotubes as supports for SACs, highlighting their characteristics and associated research studies. The SACs are synthesized using methods such as pyrolysis, wet chemistry, and chemical vapor deposition, which allow for precise control over the atomic distribution of catalytic active sites. Carbon-supported SACs have demonstrated excellent performances in various applications, including photocatalysis and electrocatalysis. This paper details the synthesis methods and potential applications of carbon-supported SACs, providing insights into their future development and contributions to the advancement of next-generation catalytic technologies.

Keywords

Acknowledgement

This work was supported by the Pukyong National University Research Fund in 2023(202315540001).

References

  1. M. Stratakis and H. Garcia, Catalysis by supported gold nanoparticles: beyond aerobic oxidative processes, Chem. Rev., 112, 4469-506 (2012). https://doi.org/10.1021/cr3000785
  2. Y. J. Wang, N. Zhao, B. Fang, H. Li, and X. T. Bi, Carbon-supported Pt-based alloy electrocatalysts for the oxygen reduction reaction in polymer electrolyte membrane fuel cells: Particle size, shape, and composition manipulation and their impact to activity, Chem. Rev., 115, 3433-3467 (2015). https://doi.org/10.1021/cr500519c
  3. Y. Chen, S. Ji, C. Chen, Q. peng, D. Wang, and Y. Li, Single-atom catalysts: Synthetic strategies and electrochemical applications, Joule, 2, 1242-1264 (2018). https://doi.org/10.1016/j.joule.2018.06.019
  4. S. Liang, C. Hao, and Y. Shi, The power of single‐atom catalysis, ChemCatChem, 7, 2559-2567 (2015). https://doi.org/10.1002/cctc.201500363
  5. M. Flytzani-Stephanopoulos and B. C. Gates, Atomically dispersed supported metal catalysts, Annu. Rev. Chem. Biomol. Eng., 3, 545-574 (2012). https://doi.org/10.1146/annurev-chembioeng-062011-080939
  6. R. Wang, C. He, W. Chen, C. Zhao, and J. Huo, Rich B active centers in Penta-B2C as high-performance photocatalyst for nitrogen reduction, Chin. Chem. Lett., 32, 3821-3824 (2021). https://doi.org/10.1016/j.cclet.2021.05.024
  7. J. Li, Y. Zhou, W. Tang, J. Zheng, X. Gao, N. Wang, W. Chen, M. Wei, X. Xiao, and W. Chu, Cold-plasma technique enabled supported Pt single atoms with tunable coordination for hydrogen evolution reaction, Appl. Catal. B: Environ., 285, 119861. https://doi.org/10.1016/j.apcatb.2020.119861
  8. W. Guo, Z. Wang, X. Wang, and Y. Wu, General design concept for single-atom catalysts toward heterogeneous catalysis, Adv. Mater., 33, e2004287 (2021). https://doi.org/10.1002/adma.202004287
  9. J. Su, R. Ge, Y. Dong, F. Hao, and L. Chen, Recent progress in single-atom electrocatalysts: Concept, synthesis, and applications in clean energy conversion, J. Mater. Chem. A, 6, 14025-14042 (2018). https://doi.org/10.1039/C8TA04064H
  10. S. Li, X. Lu, S. Liu, J. Zhou, Y. Liu, H. Zhang, R. Shen, K. Sun, J. Jiang, Y. Wang, and B. Li, Structure design and electrochemical properties of carbon-based single atom catalysts in energy catalysis: A review, J. Energy Chem., 98, 196-236 (2024). https://doi.org/10.1016/j.jechem.2024.06.028
  11. Y. Rozita, R. Brydson, T. P. Comyn, A. J. Scott, C. Hammond, A. Brown, S. Chauruka, A. Hassanpour, N. P. Young, A. I. Kirkland, H. Sawada, and R. I. Smith, A study of commercial nanoparticulate γ-Al2O3 catalyst supports, ChemCatChem, 5, 2695-2706 (2013). https://doi.org/10.1002/cctc.201200880
  12. Y. Qian, I. M. Ismail, and A. Stein, Ultralight, high-surface-area, multifunctional graphene-based aerogels from self-assembly of graphene oxide and resol, Carbon,. 68, 221-231 (2014). https://doi.org/10.1016/j.carbon.2013.10.082
  13. J. J. Niu, and J. N. Wang, Activated carbon nanotubes-supported catalyst in fuel cells, Electrochim. Acta, 53, 8058-8063 (2008). https://doi.org/10.1016/j.electacta.2008.06.026
  14. C. Chen, T. Ma, Y. Shang, B. Gao, B. Jin, H. Dan, Q. Li, Q. Yue, Y. Li, Y. Wang, and X. Xu, In-situ pyrolysis of Enteromorpha as carbocatalyst for catalytic removal of organic contaminants: Considering the intrinsic N/Fe in Enteromorpha and non-radical reaction, Appl. Catal. B: Environ., 250, 382-395 (2019). https://doi.org/10.1016/j.apcatb.2019.03.048
  15. Y. Qi, J. Li, Y. Zhang, Q. Cao, Y. Si, Z. Wu, M. Akram, and X. Xu, Novel lignin-based single atom catalysts as peroxymonosulfate activator for pollutants degradation: Role of single cobalt and electron transfer pathway, Appl. Catal. B: Environ., 286, 119910 (2021).
  16. C. Wan, X. Duan, and Y. Huang, Molecular design of single‐atom catalysts for oxygen reduction reaction, Adv. Energy Mater., 10, 1903815 (2020). https://doi.org/10.1002/aenm.201903815
  17. I.C. Gerber, and P. Serp, A theory/experience description of support effects in carbon-supported catalysts, Chem. Rev., 120, 1250-1349 (2020). https://doi.org/10.1021/acs.chemrev.9b00209
  18. A. Bakandritsos, R. G. Kadam, P. Kumar, G. Zoppellaro, M. Medved, J. Tuček, T. Montimi, O. Tomanec, P. Andrýsková, B. Drahoš, R. S. Varma, M. Otyepka, M. B. Gawande, P. Fornasiero, and R. Zbořil, Mixed-valence single-atom catalyst derived from functionalized graphene, Adv. Mater., 31, e1900323 (2019). https://doi.org/10.1002/adma.201900323
  19. M. B. Gawande, P. Fornasiero, and R. Zbořil, Carbon-based single-atom catalysts for advanced applications,. ACS Catal., 10, 2231-2259 (2020). https://doi.org/10.1021/acscatal.9b04217
  20. Y. Shang, X. Duan, S. Wang, Q. yue, B. Gao, and X. Xu, Carbon-based single atom catalyst: Synthesis, characterization, DFT calculations, Chin. Chem. Lett., 33, 663-673 (2022). https://doi.org/10.1016/j.cclet.2021.07.050
  21. C. Rivera‐Cárcamo, and P. Serp, Single atom catalysts on carbon‐based materials, ChemCatChem, 10, 5058-5091 (2018). https://doi.org/10.1002/cctc.201801174
  22. L. Zhang, Y. Ren, W. Liu, A. Wang, and T. Zhang, Single-atom catalyst: A rising star for green synthesis of fine chemicals, Natl. Sci. Rev., 5, 653-672 (2018). https://doi.org/10.1093/nsr/nwy077
  23. H. Y. Zhuo, X. Zhang, J. X. Liang, Q. Yu, H. Xiao, and J. Li, Theoretical understandings of graphene-based metal single-atom catalysts: Stability and catalytic performance, Chem. Rev., 120, 12315-12341 (2020). https://doi.org/10.1021/acs.chemrev.0c00818
  24. E. Antolini, Carbon supports for low-temperature fuel cell catalysts, Appl. Catal. B: Environ., 88, 1-24 (2009). https://doi.org/10.1016/j.apcatb.2008.09.030
  25. V. Yarlagadda, M. K. Carpenter, T. E. Moylan, R. S. Kukreja, R. Koestner, W. Gu, L. Thompson, and A. Kongkanand, Boosting fuel cell performance with accessible carbon mesopores, ACS Energy Lett., 3, 618-621 (2018). https://doi.org/10.1021/acsenergylett.8b00186
  26. P. Trogadas, T. F. Fuller, and P. Strasser, Carbon as catalyst and support for electrochemical energy conversion, Carbon, 75, 5-42 (2014). https://doi.org/10.1016/j.carbon.2014.04.005
  27. P. Nicolaus and E. Grivei, Structure and electrical properties of carbon black, Carbon, 40, 201-205 (2002). https://doi.org/10.1016/S0008-6223(01)00174-9
  28. Y. W. Kim and J. S. Lee, Study on the Pt - C catalyst preparation for PAFC's electrode, Appl. Chem. Eng., 4, 522-529 (1993).
  29. L. Forni, D. Molinari, I. Rossetti, and N. Pernicone, Carbon-supported promoted Ru catalyst for ammonia synthesis, Appl. Catal. A: Gen., 185, 269-275 (1999) https://doi.org/10.1016/S0926-860X(99)00144-1
  30. N. R. Ostyn, J. A. Steele, M. D. Prins, S. P. Sree, C. V. Chandran, W. Wangermez, G. vanbutsele, J. W. Seo, M. B. J. Roeffaers, E. Breynaerts, and J. A. Martens, Low temperature activation of carbon black by selective photocatalytic oxidation, Nanoscale Adv., 1, 2873-2880 (2019) https://doi.org/10.1039/C9NA00188C
  31. Y.X. Du, Q. Yang, W. T. Lu, Q. Y. Guan, F. F. Cao, and G. Zhang, Carbon black‐supported single‐atom Co N C as an efficient oxygen reduction electrocatalyst for H2O2 production in acidic media and microbial fuel cell in neutral media, Adv. Funct. Mater., 33, 2300895 (2023). https://doi.org/10.1002/adfm.202300895
  32. Y. J. Choi, Y. S. Lee, and J. S. Im, Effect of pore structure of activated carbon fiber on mechanical properties, Appl. Chem. Eng., 29, 318-324 (2018). https://doi.org/10.14478/ACE.2018.1013
  33. G. C. Torres, E. L. Jablonski, G. T. Baronetti, S. R. de Miguel, O. A. Scelza, M. D. Blanco, M. A. Peña Jiménez, and J. L. G. Fierro, Effect of the carbon pre-treatment on the properties and performance, Appl. Catal. A: Gen., 161, 213-226 (1997). https://doi.org/10.1016/S0926-860X(97)00071-9
  34. H. E. Van Dam and H. V. Bekkum, Preparation of platinum on activated carbon, J. Catal., 131, 335-349 (1991). https://doi.org/10.1016/0021-9517(91)90269-A
  35. Y. Zhou, Y. Yu, D. Ma, A. C. Foucher, L. Xiong, J. Zhang, E. A. Stach, Q. Yue, and Y. Kang, Atomic Fe dispersed hierarchical mesoporous Fe–N–C nanostructures for an efficient oxygen reduction reaction, ACS Catal., 11, 74-81 (2020).
  36. J.W. Park, G. Park, M. Kim, M. Han, J. Jang, Y. Yamauchi, B. Yuliarto, P. Krüger, J. Kim, N. Park, and H. Lim, Ni-single atom decorated mesoporous carbon electrocatalysts for hydrogen evolution reaction, Chem. Eng. J., 468, 143733 (2023). https://doi.org/10.1016/j.cej.2023.143733
  37. I. W. Wang, D. A. Kutteri, B. Gao, H. Tian, and J. Hu, Methane pyrolysis for carbon nanotubes and COx-free H2 over transition-metal catalysts, Energy Fuels, 33, 197-205 (2018).
  38. Y. Xing, Synthesis and electrochemical characterization of uniformly-dispersed high loading Pt nanoparticles on sonochemically-treated carbon nanotubes, J. Phys. Chem. B, 108, 19255-19259 (2004). https://doi.org/10.1021/jp046697i
  39. Z. D. Wei, C. Yan, L. Li, C. X. Sun, Z. G. Shao, P. K. Shen, and H. W. Dong, Spontaneous, Reduction of Pt(IV) onto the sidewalls of functionalized multiwalled carbon nanotubes as catalysts for oxygen reduction reaction in PEMFCs, J. Phys. Chem. C, 112, 2671-2677 (2008).
  40. G. L. Puma, A. Bono, D. Krishnaiah, and J. G. Collin, Preparation of titanium dioxide photocatalyst loaded onto activated carbon support using chemical vapor deposition: A review paper, J. Hazard. Mater., 157, 209-219 (2008). https://doi.org/10.1016/j.jhazmat.2008.01.040
  41. Z. Heidarinejad, M. H. Dehghani, M. Heidari, G. Javedan, and M. Sillanpää, Methods for preparation and activation of activated carbon: A review, Environ. Chem. Lett., 18, 393-415 (2020). https://doi.org/10.1007/s10311-019-00955-0
  42. M. Gurrath, T. kuretzky, H. P. Boehm, L. B. Okhlopkova, A. S. Lisitsyn, and V. A. Likholobov, Palladium catalysts on activated carbon supports: Influence of reduction tem-perature, origin of the support and pretreatments of the carbon surface, Carbon, 38, 1241-1255 (2000) https://doi.org/10.1016/S0008-6223(00)00026-9
  43. M. Qian, M. Lu, M. Yan, C. Chen, Y. Hu, Y. Li, J. Chen, and X. L. Wu, Single-atom Co-N3 sites supported on waste paper-derived active carbon for synergistic adsorption and catalytic degradation of antibiotics, J. Environ. Chem. Eng., 11, 109219 (2023). https://doi.org/10.1016/j.jece.2022.109219
  44. H. Huang, K. Shen, F. Chen, and Y. Li, Metal–organic frameworks as a good platform for the fabrication of single-atom catalysts, ACS Catal., 10, 6579-6586 (2020). https://doi.org/10.1021/acscatal.0c01459
  45. N. Cheng, L. Zhang, K. D. Davis, and X. Sun, Single-atom catalysts: From design to application, Electrochem. Energy Rev., 2, 539-573 (2019). https://doi.org/10.1007/s41918-019-00050-6
  46. Q, Shi, S. Fu, C. Zhu, J. Song, D. Du, and Y. Lin, Metal–organic frameworks-based catalysts for electrochemical oxygen evolution, Mater. Horiz., 6, 684-702 (2019). https://doi.org/10.1039/C8MH01397G
  47. B. N. Bhadra and S. H. Jhung, Well-dispersed Ni or MnO nanoparticles on mesoporous carbons: preparation via carbonization of bimetallic MOF-74s for highly reactive redox catalysts, Nanoscale, 10, 15035-15047 (2018). https://doi.org/10.1039/C8NR04262D
  48. T. A. Wezendonk, V. P. Santos, M. A. Nasalevich, Q. S. E. Warringa, A. Iulian Dugulan, A. Chojecki, A. C. J. Koeken, M. Ruitenbeek, G. Meima, H. U. Islam, G. Sankar, M. Makkee, F. Kaptejin, and J. Gascon, Elucidating the nature of Fe species during pyrolysis of the Fe-BTC MOF into highly active and stable Fischer–Tropsch catalysts, ACS Catal., 6, 3236-3247 (2016). https://doi.org/10.1021/acscatal.6b00426
  49. Z. Li, N. M. Schweitzer, A. B. League, V. Bernales, A. W. Peters, A. B. Getsoan, T. C. Wang, J. T. Millers, A. Vjunov, J. L. Fulton, J. A. Lercher, C. J. Cramer, L. Galiardi, J. T. Hupp, and O. K. Farha, Sintering-resistant single-site nickel catalyst supported by metal-organic framework, J. Am. Chem. Soc., 138, 1977-1982 (2016). https://doi.org/10.1021/jacs.5b12515
  50. W. Song, C. Xiao, J. Ding, Z. Huang, X. Yang, T. Zhang, and D. Mitlin, Review of carbon support coordination environments for single metal atom electrocatalysts (SACS), Adv. Mater., 36, e2301477 (2024). https://doi.org/10.1002/adma.202301477
  51. Y. Peng, B. Lu, and S. Chen, Carbon-supported single atom catalysts for electrochemical energy conversion and storage, Adv Mater, 30, e1801995 (2018). https://doi.org/10.1002/adma.201801995
  52. X. Yao, C. Bai, J. Chen, and Y. Li, Efficient and selective green oxidation of alcohols by MOF-derived magnetic nanoparticles as a recoverable catalyst, RSC Adv., 6, 26921-26928 (2016). https://doi.org/10.1039/C6RA01617K
  53. W. Qu, C. Chen, Z. Tang, H. Wen, L. Hu, D. Xia, S. Tian, H. Zhao, C. He, and D. Shu, Progress in metal-organic-framework-based single-atom catalysts for environmental remediation, Coord. Chem. Rev., 474, 214855 (2023). https://doi.org/10.1016/j.ccr.2022.214855
  54. W. Bi, X. Li, R. You, M. Chen, R. Yuan, W. Huang, X. Wu, W. Chu, C. Wu, and Y. Xie, Surface immobilization of transition metal ions on nitrogen-doped graphene realizing high-efficient and selective CO2 reduction, Adv. Mater., 30, e1706617 (2018). https://doi.org/10.1002/adma.201706617
  55. H. Xu, S. Xi, J. Li, S. Liu, P. Lyn, W. Yu, T. Sun, D. C. Qi, Q. He, H. Xiao, M. Lin, J. Wu, J. Zhang, and J. Lu, Chemical design and synthesis of superior single-atom electrocatalysts via in situ polymerization, J. Mater. Chem. A, 8, 17683-17690 (2020). https://doi.org/10.1039/D0TA05130F
  56. L. Ma, S. Chen, Z. Pei, Y. Huang, G. Liang, F. Mo, Q. Yang, J. Su, Y. Gao, J. A. Zapien, and C. Zhi, Single-site active iron-based bifunctional oxygen catalyst for a compressible and rechargeable zinc-air battery, ACS Nano, 12, 1949-1958 (2018). https://doi.org/10.1021/acsnano.7b09064
  57. A. Ramirez, L. Gevers, A. Bavykina, S. Ould-Chikh, and J. Gascon, Metal organic framework-derived iron catalysts for the direct hydrogenation of CO2 to short chain olefins, ACS Catal., 8, 9174-9182 (2018). https://doi.org/10.1021/acscatal.8b02892
  58. Q. Chang, C. Zhang, C. Liu, Y. Wei, A. V. Cheruvathur, A. I. Dugulan, J. W. Niemantsverdriet, X. Liu, Y. He, M. Qing, L. Zheng, Y. Yun, Y. Yang, and Y. Li, Relationship between iron carbide phases (ε-Fe2C, Fe7C3, and χ-Fe5C2) and catalytic performances of Fe/SiO2 Fischer–Tropsch catalysts, ACS Catal., 8, 3304-3316 (2018). https://doi.org/10.1021/acscatal.7b04085
  59. Y. Chen, S. ji, Y. Wang, J. Dong, W. Chen, Z. Li, R. Shen, L. Zheng, Z. Zhuang, D. Wang, and Y. Li, Isolated single ironatoms anchored on N-doped porous carbon as an efficient electrocatalyst for the oxygen reduction reaction, Angew. Chem. Int. Ed., 56, 6937-6941 (2017). https://doi.org/10.1002/anie.201702473
  60. G. Malta, S. A. kondrat, S. J. Freakley, C. J. Davies, L. Lu, S. Dawson, A. Thetford, E. K. Gibson, D. J. Morgan, W. Jones, P. P. Wells, P. Johnston, C. R. A. Catlow, C. J. Kiely, and G. J. Hutchings, Identification of single-site goldcatalysis in acetylene hydrochlorination, Science, 355, 1399-1403 (2017). https://doi.org/10.1126/science.aal3439
  61. Z. Liang, J. Shen, X. Xu, F. Li, J. Liu, B. Yuan, Y. Yu, and M. Zhu, Advances in the development of single-atom catalysts for high-energy-density lithium-sulfur batteries, Adv. Mater., 34, e2200102 (2022). https://doi.org/10.1002/adma.202200102
  62. H. Wang, X. Wang, J. Pan, L. Zhang, M. Zhao, J. Xu, B. Liu, W. Shi, S. Song, and H. Zhang, Ball-milling induced debonding of surface atoms from metal bulk for construing high-performance dual-site single-atom catalysts, Angew. Chem. Int. Ed., 60, 23154-23158 (2021). https://doi.org/10.1002/anie.202109356
  63. X. Cui, J. Xiao, Y. Wu, P. Du, R. Si, H. Yang, H. Tian, J. Li, W. H. Zhang, D. Deng, and X. Bao, A graphene composite material with single cobalt active sites: A highly efficient counter electrode for dye-sensitized solar cells, Angew. Chem. Int. Ed., 55, 6708-6712 (2016). https://doi.org/10.1002/anie.201602097
  64. X. Chen, L. Yu, S. Wang, D. Deng, and X. Bao, Highly active and stable single iron site confined in graphene nanosheets for oxygen reduction reaction, Nano Energy, 32, 353-358 (2017). https://doi.org/10.1016/j.nanoen.2016.12.056
  65. D. Deng, X. Chen, L. Yu, X. Wu, Q. Liu, Y. Liu, H. Yang, H. Tian, Y. Hu, P. Du, R. Si, J. Wang, X. Cui, H. Li, J. Xiao, T. Xu, J. Deng, F. Yang, P. N. Duchesne, P. Zhang, L. Sun, J. Li, X. Pan, and X. Bao, Chemistry; A single iron site confined in a graphene matrix for the catalytic oxidation of benzene at room temperature, Sci. Adv., 1, 1-9 (2015).
  66. G. Qu, K. Wei, K. Pan, J. Qin, J. Lv, J. Li, and P. Ning, Emerging materials for electrochemical CO2 reduction: Progress and optimization strategies of carbon-based single-atom catalysts, Nanoscale, 15, 3666-3692 (2023). https://doi.org/10.1039/D2NR06190B
  67. N. Cheng, S. Stambula, D. Wang, M N. Banis, J. Liu, A. Riese, B. Xiao, R. Li, T. K. Sham, L. M. Liu, G. A. Botton, and X. Sun, Platinum single-atom and cluster catalysis of the hydrogen evolution reaction, Nat. Commun., 7, 13638 (2016). https://doi.org/10.1038/ncomms13638
  68. H. Zhang, W. Liu, D. Cao, and D. Cheng, Carbon-based material-supported single-atom catalysts for energy conversion, iScience, 25, 104367 (2022). https://doi.org/10.1016/j.isci.2022.104367
  69. Z, Kang, X. Wang, D. Wang, B. Bai, Y. Zhao, X. Xiang, B. Zhang, and H. Shang, Carbon-based single-atom catalysts: Impacts of atomic coordination on the oxygen reduction reaction, Nanoscale, 15, 9605-9634 (2023). https://doi.org/10.1039/D3NR01272G
  70. Y. Jiao, Y. Zheng, M. Jaroniec, and S. Z. Qiao, Design of electrocatalysts for oxygen- and hydrogen involving energy conversion reactions, Chem. Soc. Rev., 44, 2060-2086 (2015). https://doi.org/10.1039/C4CS00470A
  71. J. Hu, W. Liu, C. Xin, J. Guo, X. Cheng, J. Wei, C. Hao, G. Zhang, and Y. Shi, Carbon-based single atom catalysts for tailoring the ORR pathway: A concise review, J. Mater. Chem. A, 9, 24803-24829 (2021). https://doi.org/10.1039/D1TA06144E
  72. S. Li, J. Kan, H. Wang, J. Bai, Y. Liu, S. Liu, and Y. Wu, Single-atom photo-catalysts: Synthesis, characterization, and applications, Nano Mater. Sci., 6, 284-304 (2024). https://doi.org/10.1016/j.nanoms.2023.11.001
  73. S. Yang, Y. J. Tak, J. Kim, A. Soon, and H. Lee, Support effects in single-atom platinum catalysts for electrochemical oxygen reduction, ACS Catal., 7, 1301-1307 (2017). https://doi.org/10.1021/acscatal.6b02899
  74. L. Zhang and Z. Xia, Mechanisms of oxygen reduction reaction on nitrogen-doped graphene for fuel cells, J. Phys. Chem. C, 115, 11170-11176 (2011). https://doi.org/10.1021/jp201991j
  75. Y. Zeng, E. Almatrafi, W. Xia, B. Song, W. Xiong, M. Cheng, Z. wang, Y. liang, G. Zeng, and C. Zhou, Nitrogen-doped carbon-based single-atom Fe catalysts: Synthesis, properties, and applications in advanced oxidation processes, Coord. Chem. Rev., 475, 214874 (2023).
  76. J. Liu, B. Wang, J. Huang, R. Yang, R. Wang, Y. Song, C. Wang, Y. Hua, H. Xu, and H. Li, Featom clusters embedded N-doped graphene decorated with ultrathin mesoporous carbon nitride nanosheets for high efficient photocatalytic performance, Colloids Surf A: Physicochem. Eng. Asp, 629, 127360 (2021).
  77. S. Tonda, S. Kumar, S. Kandula, and V. Shanker, Fe-doped and -mediated graphitic carbon nitride nanosheets for enhanced photocatalytic performance under natural sunlight, J. Mater. Chem. A, 2, 6772-6780 (2014). https://doi.org/10.1039/c3ta15358d
  78. Z. H. Xue, D. Luan, H. Zhang, and X. W. Lou, Single-atom catalysts for photocatalytic energy conversion, Joule, 6, 92-133 (2022). https://doi.org/10.1016/j.joule.2021.12.011
  79. Z. Chen, E. Vorovyeva, S. Mitchell, E. Fako, M. A. Ortuño, N. López, S. M. Collins, P. A. Midgley, S. Richard, G. Vilé, and J. Pérez-Ramírez, Heterogeneous single-atom palladium catalyst surpassing homogeneous systems for Suzuki coupling, Nat. Nanotechnol., 13, 702-707 (2018). https://doi.org/10.1038/s41565-018-0167-2
  80. A. Leyva-Perez, Sub-nanometre metal clusters for catalytic carbon-carbon and carbon-heteroatom cross-coupling reactions, Dalton Trans., 46, 15987-15990 (2017). https://doi.org/10.1039/C7DT03203J
  81. E. K. Lee, S. A. Park, H. Woo, K. H. Park, D. W. Kang, H. Lim, and Y. T. Kim, Platinum single atoms dispersed on carbon nanotubes as reusable catalyst for Suzuki coupling reaction, J. Catal., 352, 388-393 (2017). https://doi.org/10.1016/j.jcat.2017.05.005