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Catalytic Reduction Efficiency Comparison between Porous Au, Pt, and Pd Nanoplates

요철형 금, 백금, 팔라듐 나노플레이트의 촉매성 환원 효율 비교

  • Shin, Woojun (Department of Chemistry, Kwangwoon University) ;
  • Kim, Young-Jin (Institute of Advanced Composite Materials, Korea Institute of Science and Technology) ;
  • Jang, Hongje (Department of Chemistry, Kwangwoon University) ;
  • Park, Ji Hun (Department of Science Education, Ewha Womans University) ;
  • Kim, Young-Kwan (Institute of Advanced Composite Materials, Korea Institute of Science and Technology)
  • Received : 2019.01.15
  • Accepted : 2019.05.01
  • Published : 2019.04.30

Abstract

The size, morphology and composition of nanoparticles are regarded as the most important factors to the efficiency of catalytic reduction of various chemical compounds. In order to make a systematic comparison, gold, platinum and palladium nanoplates with 100 nm diameter with rough surface morphology were manufactured through the galvanic replacement reaction, and the reaction kinetics of the catalytic reduction of 4-nitrophenol and 4-nitroaniline was systematically analyzed by spectroscopic measurement. According to the observation, the catalytic reduction efficiency was significantly different against the constitutional elements in order of Pd > Au > Pt, and it was additionally influenced by the type of substrate.

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Fig. 1 Schematic illustration of porous Au, Pt, and Pd nanoplates mediated catalytic reduction of 4-NP and 4-NA

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Fig. 2 TEM images of porous nanoplates. Normal and HR-TEM images of (a,d) Au, (b,e) Pt, and (c,f) Pd nanoplates. Inset images are FFT of each nanoplate. The scale bars are 50 nm and 10 nm for normal and HR-TEM, respectively

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Fig. 3 Characterization of porous Au, Pt, Pd nanoplates. (a) UVVis spectra, (b) DLS, and (c) zeta-potential of porous nanoplates represented the successful synthesis of nanoplates with similar in dimension and surface environment

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Fig. 4 Catalytic reduction of 4-NP by using porous (a) Au, (b) Pt, and (c) Pd nanoplates. (d) Reduction kinetics plotting from data a-c

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Fig. 5 Catalytic reduction of 4-NA by using porous (a) Au, (b) Pt, and (c) Pd nanoplates. (d) Reduction kinetics plotting from data a-c

Acknowledgement

Supported by : 한국과학기술연구원, 한국연구재단

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