Pt 3 (CoNi) Ternary Intermetallic Nanoparticles Immobilized on N-Doped Carbon Derived from Zeolitic Imidazolate Frameworks for Oxygen Reduction

Pt-based intermetallic compound (IMC) nanoparticles have been considered the most promising catalysts for oxygen reduction reaction (ORR) in proton exchange membrane fuel cells (PEMFC). Herein, we propose a strategy for producing ordered Pt (CoNi) ternary IMC nanoparticles supported on N-doped carbo...

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Bibliographic Details
Published in:Materials 2024-09, Vol.17 (19)
Main Authors: Song, Shiqi, Hu, Junhua, Wang, Chupeng, Luo, Mingsheng, Wang, Xiaoxia, Zhai, Fengxia, Zheng, Jianyong
Format: Article
Language:English
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Summary:Pt-based intermetallic compound (IMC) nanoparticles have been considered the most promising catalysts for oxygen reduction reaction (ORR) in proton exchange membrane fuel cells (PEMFC). Herein, we propose a strategy for producing ordered Pt (CoNi) ternary IMC nanoparticles supported on N-doped carbon materials. Particularly, the Co and Ni are originally embedded into ZIF-derived carbon, which diffuse into Pt nanocrystals to form Pt (CoNi) nanoparticles. Moreover, a thin layer of carbon develops outside of Pt (CoNi) nanoparticles during the cooling process, which contributes to stabilizing the Pt (CoNi) on carbon supports. The optimal Pt (CoNi) nanoparticle catalyst has achieved significantly enhanced activity and stability, exhibiting a half-wave potential of 0.885 V vs reversible hydrogen electrode (RHE) and losing only 16 mV after 10,000 potential cycles between 0.6 and 1.0 V. Unlike the direct-use commercial carbon (VXC-72) for depositing Pt, we utilized ZIF-derived carbon containing dispersed Co and Ni nanocluster or nanoparticles to prepare ordered Pt (CoNi) intermetallic catalysts.
ISSN:1996-1944
1996-1944