University of Oulu

Wang, C., Kuai, L., Cao, W., Singh, H., Zakharov, A., Niu, Y., Sun, H., & Geng, B. (2021). Highly dispersed Cu atoms in MOF-derived N-doped porous carbon inducing Pt loads for superior oxygen reduction and hydrogen evolution. Chemical Engineering Journal, 426, 130749. https://doi.org/10.1016/j.cej.2021.130749

Highly dispersed Cu atoms in MOF-derived N-doped porous carbon inducing Pt loads for superior oxygen reduction and hydrogen evolution

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Author: Wang, Chao1; Kuai, Long2; Cao, Wei3;
Organizations: 1College of Chemistry and Materials Science, The Key Laboratory of Functional Molecular Solids, Ministry of Education, The Key Laboratory of Electrochemical Clean Energy of Anhui Higher Education Institutes, Anhui Provincial Engineering Laboratory for New-Energy Vehicle Battery Energy-Storage Materials, Anhui Normal University, Wuhu 241002, China
2School of Chemical and Environmental Engineering, Anhui Polytechnic University, Wuhu 241000, China
3Nano and Molecular Systems Research Unit, University of Oulu FIN-90014, Finland
4MAX IV Laboratory, Lund University, P.O. Box 118, 22100 Lund, Sweden
5Institute of Energy, Hefei Comprehensive National Science Center, Anhui, Hefei 230031, China
Format: article
Version: accepted version
Access: embargoed
Persistent link: http://urn.fi/urn:nbn:fi-fe202301235234
Language: English
Published: Elsevier, 2021
Publish Date: 2023-06-10
Description:

Abstract

The preparation of oxygen reduction reaction (ORR) and hydrogen evolution reaction (HER) catalysts with high activity, stability and low platinum loading has always been the focus of research. The single-atom platinum supported catalyst greatly improves the utilization of platinum, but the catalytic activity and selectivity are greatly affected by the platinum coordination environment, and the preparation of the material is difficult. Doping base metals to adjust the electronic structure of platinum is an effective strategy to improve catalyst performance. In this work, copper-platinum alloy nanoparticles were loaded on N-doped porous carbon via a targeted route guided by highly dispersed Cu atoms derived from MOF. The product C-ZIF-CuPt has high activity and high stability ORR, HER bifunctional catalytic performance, which is better than commercial Pt/C (20 wt%). The Pt activity in C-ZIF-CuPt is 4.4 times (ORR) and 6.7 times (HER) than Pt/C. Spectromicroscopic determinations unveiled that strong interactions between carbon carrier and the CuPt alloys contribute to the overall stabilities. DFT calculations show that Cu doping can increase the d-band center of Pt, reduce the ORR overpotential, and the activation energy barrier to water molecules, which is beneficial to ORR and HER catalysis. Under the same carrier conditions, the performance of sub-nano (single atoms, clusters) platinum-supported catalysts (C-ZIF-Cu-Pt) is inferior to C-ZIF-CuPt. This further shows that platinum alloying can effectively improve the performance of the catalyst.

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Series: Chemical engineering journal
ISSN: 1385-8947
ISSN-E: 1873-3212
ISSN-L: 1385-8947
Volume: 426
Article number: 130749
DOI: 10.1016/j.cej.2021.130749
OADOI: https://oadoi.org/10.1016/j.cej.2021.130749
Type of Publication: A1 Journal article – refereed
Field of Science: 114 Physical sciences
Subjects:
Funding: This work was supported by the National Natural Science Foundation of China (21871005), the Program for Innovative Research Team of Anhui Education Committee, the Project for Collaborative Innovation of Anhui Higher Education Institutes (GXXT-2020-005). The authors thank also the crew of the MAX IV laboratory for their support during the beamtime operation.
Copyright information: © 2021. This manuscript version is made available under the CC-BY-NC-ND 4.0 license https://creativecommons.org/licenses/by-nc-nd/4.0/
  https://creativecommons.org/licenses/by-nc-nd/4.0/