Lattice Hydrogen Boosts CO Tolerance of Pd Anode Catalysts in High‐Temperature Proton Exchange Membrane Fuel Cells

IF 18.5 1区 材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY Advanced Functional Materials Pub Date : 2025-01-30 DOI:10.1002/adfm.202415358
Gen Huang, Yujie Wu, Yingying Li, Shiqian Du, Qie Liu, Miaoyu Li, Dongcai Zhang, Zuyao Jiang, Siyu Zhong, Shanfu Lu, Li Tao, Shuangyin Wang
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引用次数: 0

Abstract

High‐temperature proton exchange membrane fuel cells (HT‐PEMFCs) demonstrate crude hydrogen can be a cost‐effective fuel source. However, the performance of HT‐PEMFCs is hindered by challenges such as high‐concentration CO poisoning and preferential adsorption of H3PO4 on electrocatalysts. This study explores the performance of Pt group metals as anode catalysts, specifically focusing on hydrogen oxidation reaction (HOR) activity, H3PO4 tolerance, and CO tolerance under operational conditions in HT‐PEMFCs. The results reveal that all Pt‐group catalysts significantly improve HOR activity with increasing reaction temperature. Notably, Pd‐based catalysts demonstrate superior H3PO4 tolerance and CO tolerance. HT‐PEMFCs using Pd/C as the anode catalyst maintain the highest output power density, achieving a remarkable 6.4‐fold performance compared to Pt/C catalysts and superior stability in the presence of 3%–10% CO in H2. Both experimental and theoretical investigations have consistently demonstrated that Pd possesses the weakest CO adsorption energy, the existence of CO in crude H2 in HT‐PEMFCs inhibits hydrogen overflow from the lattice interstitial space of Pd, and the trapped lattice hydrogen further promotes the desorption of CO. This research contributes to the advancement of direct utilizing industrial crude hydrogen as a fuel for HT‐PEMFCs and offers invaluable insights into reactions involving CO.
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来源期刊
Advanced Functional Materials
Advanced Functional Materials 工程技术-材料科学:综合
CiteScore
29.50
自引率
4.20%
发文量
2086
审稿时长
2.1 months
期刊介绍: Firmly established as a top-tier materials science journal, Advanced Functional Materials reports breakthrough research in all aspects of materials science, including nanotechnology, chemistry, physics, and biology every week. Advanced Functional Materials is known for its rapid and fair peer review, quality content, and high impact, making it the first choice of the international materials science community.
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