Affiliation:
1. School of Materials Science and Engineering North China University of Water Resources and Electric Power Zhengzhou 450045 China
2. School of Chemical Engineering Dalian University of Technology Panjin Campus Panjin 124221 China
3. School of Physics and Electronic Electrical Engineering Huaiyin Normal University Huai'an 223300 China
4. School of Material and Chemical Engineering Center for Advanced Materials Research Zhongyuan University of Technology Zhengzhou 450007 China
Abstract
AbstractDesigning electrocatalysts with strong electronic metal‐support interaction can effectively regulate the electronic properties of metal active centers, therefore maximizing the catalytic performance. As a proof of concept, heteroatoms doped carbon with CoPt alloy and isolated Co single atoms (CoPtCoSA@NSC) are synthesized using CoPt bimetallic metal‐organic framework as the precursor in this work. The existence of CoSA on the carbon substrate leads to more electron transfer between CoPt and the support, and appropriate upward shift of the d band center of the catalysts, which can effectively reduce the reaction barrier of rate determine step and boost the catalytic performance of CoPt alloy. The enhanced catalytic activity and stability of CoPtCoSA@NSC are demonstrated experimentally. Remarkably, the overpotential for hydrogen evolution reaction is only 23 mV at 10 mA cm−2and the half‐wave potential for oxygen reduction reaction is 0.90 V, both exceeding the commercial Pt/C benchmark. In addition, CoPtCoSA@NSC also exhibits great potential as a cathode electrocatalyst for Zn–air battery, in terms of large open circuit potential of 1.53 V, high power density of 184 mW cm−2, as well as superior cycling stability. This work provides a novel strategy for regulating the electronic structure and catalytic performance of alloy based electrocatalysts.
Funder
National Natural Science Foundation of China
Subject
Biomaterials,Biotechnology,General Materials Science,General Chemistry
Cited by
3 articles.
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