Determination of Hydrogen Oxidation Reaction Mechanism Based on Pt-Had Energetics in Alkaline Electrolyte

被引：48

作者：

Hu, Jue ^{[1
,2
]}

Kuttiyiel, Kurian A. ^{[2
]}

Sasaki, Kotaro ^{[2
]}

Zhang, Chengxu ^{[1
]}

Adzic, Radoslav R. ^{[2
]}

机构：

[1] Kunming Univ Sci & Technol, Kunming 650500, Yunnan, Peoples R China

[2] Brookhaven Natl Lab, Chem Dept, Upton, NY 11973 USA

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 2018年 / 165卷 / 15期

关键词：

RAY-ABSORPTION SPECTROSCOPY; MONOLAYER ELECTROCATALYSTS; FUEL-CELLS; PLATINUM; EVOLUTION; CATALYSTS; ADSORPTION; SURFACES; KINETICS; ALLOYS;

D O I：

10.1149/2.0471815jes

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The understanding of the sluggish hydrogen oxidation reaction (HOR) kinetics in alkaline electrolyte is crucial for designing high performance electrocatalysts. Here, we report a clear and convincing result on this problem by investigating the relationship between the HOR kinetics and Pt-adsorbate energetics. Using electrochemical analysis for well-modified Pt surfaces with distinct Pt-adsorbate interactions, we establish a clear trend in activity for HOR in alkaline electrolyte, that is, the activity changes in the order Au@Pt < Pt < Pd@Pt < Ru@Pt. A decisive role of Pt-H-ad energetics in the HOR kinetics on Pt surfaces is determined, while no favorable effects of Pt-OHad energetics in the HOR kinetics were found. The nature of strong Pt-H-ad interaction for Pt/C catalyst in alkaline electrolyte is revealed by in-situ X-ray absorption near-edge structure (XANES)analysis. These insights play an important role for better understanding the mechanism and structure sensitivity for Pt catalyzed hydrogen oxidation reactions. (C) The Author(s) 2018. Published by ECS.

引用

页码：J3355 / J3362

页数：8

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