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

Journal Article · · Journal of the Electrochemical Society
DOI:https://doi.org/10.1149/2.0471815jes· OSTI ID:1485438
 [1];  [2]; ORCiD logo [2]; ORCiD logo [3];  [2]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States); Kunming Univ. of Science and Technology (China)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States)
  3. Kunming Univ. of Science and Technology (China)

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-Had 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-Had 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.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0012704
OSTI ID:
1485438
Report Number(s):
BNL-209670-2018-JAAM
Journal Information:
Journal of the Electrochemical Society, Vol. 165, Issue 15; ISSN 0013-4651
Publisher:
The Electrochemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 33 works
Citation information provided by
Web of Science

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Cited By (2)

Kinetic‐Oriented Construction of MoS 2 Synergistic Interface to Boost pH‐Universal Hydrogen Evolution journal December 2019
Planar polymer electrolyte membrane fuel cells: powering portable devices from hydrogen journal January 2020

Figures / Tables (5)


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