过电位
析氧
尖晶石
分解水
材料科学
密度泛函理论
催化作用
钴
氧化物
X射线吸收光谱法
氧化钴
化学工程
贵金属
无机化学
化学
金属
电化学
吸收光谱法
物理化学
计算化学
电极
生物化学
物理
光催化
量子力学
工程类
冶金
作者
G.J. Wang,Guikai Zhang,Chen Xu
出处
期刊:Small
[Wiley]
日期:2024-01-09
被引量:1
标识
DOI:10.1002/smll.202310372
摘要
Abstract Oxygen evolution reaction (OER) plays a critical role in energy conversion technologies. Significant progress has been made in alkaline conditions. In contrast, it remains a challenge to develop stable OER electrocatalysts in acidic conditions. Herein, a new strategy is reported to stabilize single atoms integrated into cobalt oxide spinel structure with interstitial carbon (Ru 0.27 Co 2.73 O 4 ), where the optimized Ru 0.27 Co 2.73 O 4 exhibits a low overpotential of 265, 326, and 367 mV to reach a current density of 10, 50, and 100 mA cm 2 , respectively. More importantly, Ru 0.27 Co 2.73 O 4 has long‐term stability of up to 100 h, representing one of the most stable OER electrocatalysts. X‐ray adsorption spectroscopy (XAS) characterization and density functional theory (DFT) calculations jointly demonstrate that the significant catalytic performance of Ru 0.27 Co 2.73 O 4 is due to the synergistic effect between the Ru and Co sites and the bridging O ligands, as well as the significant reduction of the OER energy barrier. This work provides a new perspective for designing and constructing efficient non‐noble metal‐based electrocatalysts for water splitting.
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