Development of a Hydrogen Peroxide Sensor Based on Palladium and Copper Electroplated Laser Induced Graphene Electrode

PdCu를 전기 도금한 레이저 유도 그래핀 전극 기반의 과산화수소 측정 센서 개발

  • Park, Daehan (Dept. of Electrical and Electronic Engineering, Korea University) ;
  • Han, Ji-Hoon (Dept. of Electrical and Electronic Engineering, Korea University) ;
  • Kim, Taeheon (Dept. of Electrical and Electronic Engineering, Korea University) ;
  • Pak, Jungho (Dept. of Electrical and Electronic Engineering, Korea University)
  • Received : 2018.09.13
  • Accepted : 2018.11.07
  • Published : 2018.12.01


In this paper, we describe the fabrication and characterization of a hydrogen peroxide ($H_2O_2$) sensor based on palladium and copper (PdCu) electroplated laser induced graphene (LIG) electrodes. $CO_2$ laser was used to form LIG electrodes on a PI film. This fabrication method allows simple control of the LIG electrode size and shape. The PdCu was electrochemically deposited on the LIG electrodes to improve the electrocatalytic reaction with $H_2O_2$. The electrochemical performance of this sensor was evaluated in terms of selectivity, sensitivity, and linearity. The physical characterization of this sensor was conducted using scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS), which confirmed that PdCu was formed on the laser induced graphene electrode. In order to increase the sensor sensitivity, the Pd:Cu ratio of the electroplated PdCu was varied to five different values and the condition of highest amperometric current at an identical of $H_2O_2$ concentration was chosen among them. The resulting amperometric current was highest when the ratio of Pd:Cu was 7:3 and this Pd;Cu ratio was employed in the sensor fabrication. The fabricated PdCu/LIG electrode based $H_2O_2$ sensor exhibited a sensitivity of $139.4{\mu}A/mM{\cdot}cm^2$, a broad linear range between 0 mM and 16 mM of $H_2O_2$ concentrations at applied potential of -0.15 V, and high reproducibility (RSD = 2.6%). The selectivity of the fabricated sensors was also evaluated by applying ascorbic acid, glucose, and lactose separately onto the sensor in order to see if the sensor ourput is affected by one of them and the sensor output was not affected. In conclusion, the proposed PdCu/LIG electrode based $H_2O_2$ sensor seems to be suitable $H_2O_2$ sensor in various applications.


Grant : 1000개 이하 세포샘플의 다변수(pH, 용존산소, 열량) 동시분석이 가능한 대사량 측정시스템 개발, 레이저 유도 그래핀 전극을 이용한 인체 땀 분석용 IoT 기반 웨어러블 멀티센서 개발 연구

Supported by : 한국산업기술평가관리원, 한국연구재단


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