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Electronic-Structure-Modulated Cu,Co-Coanchored N-Doped Nanocarbon as a Difunctional Electrocatalyst for Hydrogen Evolution and Oxygen Reduction Reactions

Authors :
Liyun Cao
Rui Liu
Yixuan Huang
Dewei Chu
Mengyao Li
Guoting Xu
Xiaoyi Li
Jianfeng Huang
Yong Zhao
Liangliang Feng
Source :
Molecules, Vol 29, Iss 13, p 2973 (2024)
Publication Year :
2024
Publisher :
MDPI AG, 2024.

Abstract

To alleviate the problems of environmental pollution and energy crisis, aggressive development of clean and alternative energy technologies, in particular, water splitting, metal–air batteries, and fuel cells involving two key half reactions comprising hydrogen evolution reaction (HER) and oxygen reduction (ORR), is crucial. In this work, an innovative hybrid comprising heterogeneous Cu/Co bimetallic nanoparticles homogeneously dispersed on a nitrogen-doped carbon layer (Cu/Co/NC) was constructed as a bifunctional electrocatalyst toward HER and ORR via a hydrothermal reaction along with post-solid-phase sintering technique. Thanks to the interfacial coupling and electronic synergism between the Cu and Co bimetallic nanoparticles, the Cu/Co/NC catalyst showed improved catalytic ORR activity with a half-wave potential of 0.865 V and an excellent stability of more than 30 h, even compared to 20 wt% Pt/C. The Cu/Co/NC catalyst also exhibited excellent HER catalytic performance with an overpotential of below 149 mV at 10 mA/cm2 and long-term operation for over 30 h.

Details

Language :
English
ISSN :
14203049
Volume :
29
Issue :
13
Database :
Directory of Open Access Journals
Journal :
Molecules
Publication Type :
Academic Journal
Accession number :
edsdoj.789aceba50f4ac1a8a6ad7a0dcb9a9e
Document Type :
article
Full Text :
https://doi.org/10.3390/molecules29132973