Non-uniform nitrogen doped carbon nanosheet anchored platinum nanoparticles with high oxygen reduction reaction activity

IF 4.1 3区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Electroanalytical Chemistry Pub Date : 2025-02-21 DOI:10.1016/j.jelechem.2025.119030

Jiaxing Chen , Jinghai Liu , Yanchao Zhu , Jiawei Shi , Weiwei Cai , Luhua Lu

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Abstract

High oxygen reduction reaction (ORR) activity and stability of cathode catalyst is one of key issues to obtain high performance proton-exchange membrane fuel cells. The most successful ORR catalysts are Pt/C based composites for their stable ORR activity in acidic electrolyte in practical application. Heteroatoms doped carbon materials especially nitrogen doped carbon supports for Pt are found to be highly effective in improving ORR activity of Pt/C based catalysts. However, research on distribution of doped nitrogen in carbon materials and its influence on ORR activity and stability is rare. In this work, we report a nitrogen doped carbon nanosheet (NC) with non-uniform distribution of doped nitrogen. Nitrogen enriched microporous regions are found to be favorable for selective anchoring Pt nanoparticles by the strong PtN interaction. The influence of non-uniform doped nitrogen on ORR activity and stability of Pt/NC catalysts via statistical analysis changes of Pt nanoparticles' size and their distribution before and after accelerated durability test (ADT) is carried out. It is found that NC with appropriate non-uniform doped nitrogen can well tune disperse anchoring of Pt nanoparticles and their size on NC surface and effectively improving and stabilizing activity of Pt in acidic electrolyte environment than commercial Pt/C catalyst.

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来源期刊

Journal of Electroanalytical Chemistry 化学-电化学

CiteScore

7.80

自引率

6.70%

发文量

912

审稿时长

2.4 months

期刊介绍： The Journal of Electroanalytical Chemistry is the foremost international journal devoted to the interdisciplinary subject of electrochemistry in all its aspects, theoretical as well as applied. Electrochemistry is a wide ranging area that is in a state of continuous evolution. Rather than compiling a long list of topics covered by the Journal, the editors would like to draw particular attention to the key issues of novelty, topicality and quality. Papers should present new and interesting electrochemical science in a way that is accessible to the reader. The presentation and discussion should be at a level that is consistent with the international status of the Journal. Reports describing the application of well-established techniques to problems that are essentially technical will not be accepted. Similarly, papers that report observations but fail to provide adequate interpretation will be rejected by the Editors. Papers dealing with technical electrochemistry should be submitted to other specialist journals unless the authors can show that their work provides substantially new insights into electrochemical processes.