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A high performance and durable electrocatalyst for the cathodic hydrogen evolution reaction (HER) in anion exchange membrane (AEM) water electrolyzers is crucial for the emerging hydrogen economy. Herein, we synthesized Pt-C core-shell nanoparticles (core: Pt nanoparticles, shell: N-containing carbon) were uniformly coated on hierarchical MoS2/GNF using pyrolysis of h-MoS2/GNF with a Pt-aniline complex. The synthesized Pt-C core-shell@h-MoS2/GNF (with 11.3% Pt loading) showed HER activity with a lower overpotential of 30 mV at 10 mA∙cm-2 as compared to the benchmark catalyst 20% Pt-C (41 mV at 10 mA∙cm-2) with improved durability over 94 h at 10 mA∙cm-2. Furthermore, we investigated the structural stability and hydrogen adsorption energy for Pt13 cluster, C90 molecule, h-MoS2 sheet, Pt13-C90 core-shell, and Pt13-C90 core-shell deposited h-MoS2 sheets using density functional theory (DFT) simulations. We investigated the Pt-C core-shell@h-MoS2/GNF catalyst active sites during HER performance using in-situ Raman analysis as well as DFT. We fabricated anion exchange membrane (AEM) water electrolyzers with cathode catalysts of Pt-C core-shell@h-MoS2/GNF and evaluated device performance with 0.1 and 1.0 M KOH at 20 and 60°C. Our work provides a new pathway to design core-shell electrocatalysts for use in AEM water electrolyzers to generate green hydrogen.

権利情報:

• Creative Commons BY Attribution 4.0 International
  

キーワード: Hierarchical MoS2, Pt–C core-shell, Density functional theory, In-situ Raman analysis, Anion exchange membrane water electrolyzer

刊行年月日: 2024-01-15

出版者: Elsevier BV

掲載誌:

• Carbon (ISSN: 00086223) vol. 220 p. 118816- 118816

研究助成金:

• Ministry of Education 2023RIS-008
• Ministry of Education NRF-2022R1A2C1012300
• National Research Foundation of Korea
• UK Research and Innovation
• Jeonbuk National University
• Newcastle University EP/W005204/1

原稿種別: 出版者版 (Version of record)

MDR DOI:

公開URL: https://doi.org/10.1016/j.carbon.2024.118816

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更新時刻: 2024-03-04 16:30:11 +0900

MDRでの公開時刻: 2024-03-04 16:30:11 +0900