Oxygen evolution reaction mechanism on platinum dioxide surfaces based on density functional theory calculations

被引：0
|
作者：
Cao, Xiru [1 ]
Tan, Zhibin [1 ]
Ji, Chen [1 ]
Pan, Changwei [1 ]
机构：
[1] China Univ Min & Technol, Coll Chem Engn, Xuzhou 221116, Jiangsu, Peoples R China
来源：
COMPUTATIONAL AND THEORETICAL CHEMISTRY | 2025年 / 1244卷
基金：
中国国家自然科学基金;
关键词：
Platinum Dioxide; Oxygen Evolution Reaction; Density Functional Theory; Electrochemical Oxidation; Mechanism; ATOMIC OXYGEN; IN-SITU; PT(111) SURFACE; PERCHLORIC-ACID; FUEL-CELL; AB-INITIO; WATER; OXIDATION; ABSORPTION; REDUCTION;
D O I：
10.1016/j.comptc.2024.115020
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The oxygen evolution reaction (OER) counterbalances the hydrogen evolution reaction (HER) during water dissociation under an electric field. Platinum (Pt) group metals and their oxides exhibit considerable durability as electrocatalysts for water dissociation. However, an atomic-level understanding of the OER on Pt-oxide surfaces at high potential remains elusive because of the limited experimental techniques for tracking dynamic surface species involved in adsorption, electron transfer, or interactions. Herein, the OER mechanisms involving water nucleophilic attack (WNA) and intramolecular oxygen coupling (IMOC) were studied on Pt and platinum dioxide (PtO2) surfaces using density functional theory (DFT) calculations, indicating that the WNA mechanism dominates the OER on Pt and PtO2 electrode surfaces. The OER activity on the PtO2(100) surface is better than the PtO2(111) surface due to the high overpotential obtained on PtO2(111). These findings offer valuable insights into the OER mechanism on oxidized Pt surfaces and suggest new strategies for designing and optimizing Pt- based catalysts for improved stability and performance.
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