Ordered Mesoporous Carbon/Graphene/Nickel Foam for Flexible Dopamine Detection with Ultrahigh Sensitivity and Selectivity

Authors

Lai-yu WANG, 1. Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai, 200240, P. R. China;
Xin XI, 1. Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai, 200240, P. R. China;
Dong-qing WU, 2. School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai,200240, P. R. China;
Xiong-yu LIU, 1. Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai, 200240, P. R. China;
Wei JI, 1. Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai, 200240, P. R. China;
Rui-li LIU, 2. Laboratory of Aerospace Catalysts and New Materials, Dalian Institute of Chemical Physics, Chinese Academy of Science, Dalian 116023, China;Follow

Corresponding Author

Rui-li LIU(ruililiu@sjtu.edu.cn)

Abstract

Electro-catalytic reduction is an efficient way to achieve resourcable transformation of CO₂, which is one of the important techniques to solve the global environmental problems originated from excessive CO₂ emission. In this study, a membrane electrode assembly(MEA) type CO₂ electro-reduction electrolytic cell was constucted, which enables CO₂ feeding and real-time KHCO₃ aqueous updating on both sides of the cathode gas diffusion electrode (GDE). By means of the electrolytic cell, effects of KHCO₃ concentration and updating inside the liquid electrolytic chamber on CO₂ electro-reduction activity, production distribution and stability were investigated. The experimental results suggested that the KHCO₃ concentration exerted strong influence on the cell voltage rather than the production distribution for the current densities lower than 5 mA·cm^-2. The performance of MEA type CO₂ electro-reduction cell decayed in both “reversible” and “irreversible” ways. Catalysts leaking at the GDE/liquid electrolyte interface might be respossible for the cell “irreversible” decay. Meanwhile, th leakage of KHCO₃ aqueous electrolyte arose from gas accumulation in the liquid electrolytic chamber contributed to the “reversible” degradation, which could be recovered effectively by updating the KHCO₃ aqueous electrolyte.

Graphical Abstract

Keywords

ordered mesoporous carbon, graphene, nickel foam, dopamine sensor, flexible electrochemical sensor

DOI Link

https://doi.org/10.13208/j.electrochem.190428

Publication Date

2020-06-28

Online Available Date

2019-11-06

Revised Date

2019-08-02

Received Date

2019-04-28

Recommended Citation

Lai-yu WANG, Xin XI, Dong-qing WU, Xiong-yu LIU, Wei JI, Rui-li LIU. Ordered Mesoporous Carbon/Graphene/Nickel Foam for Flexible Dopamine Detection with Ultrahigh Sensitivity and Selectivity[J]. Journal of Electrochemistry, 2020 , 26(3): 347-358.
DOI: 10.13208/j.electrochem.190428
Available at: https://jelectrochem.xmu.edu.cn/journal/vol26/iss3/5