析氧
催化作用
化学
过电位
反应中间体
电化学
铱
傅里叶变换红外光谱
氢键
光化学
物理化学
化学工程
分子
有机化学
电极
工程类
作者
Peiyu Ma,Feng Chen,Yuan Kong,Dongdi Wang,Ming J. Zuo,Sicong Wang,Ruyang Wang,Lingling Kuang,Xilan Ding,Shiming Zhou,Zhirong Zhang,Jie Zeng,Jun Bao
出处
期刊:Chem catalysis
[Elsevier]
日期:2022-10-01
卷期号:2 (10): 2764-2777
被引量:6
标识
DOI:10.1016/j.checat.2022.08.010
摘要
The universal scaling relation between reaction intermediates with correlated adsorption has restricted energy-conversion efficiency in some catalytic processes such as oxygen evolution reaction (OER) for hydrogen production. Overcoming this intrinsic barrier requires differentiated adsorption of oxygenated intermediates. In this work, we introduce single-atom Ir species on CoOOH and Co0.8Cu0.2OOH, where their hydrogen bonding interactions with ∗OH and ∗OOH intermediates were tuned by localized structures. Electrochemical methanol oxidation measurements and in situ attenuated total reflection Fourier transform infrared (ATR-FTIR) spectra revealed different adsorptions of ∗OH and ∗OOH intermediates over Ir1/CoOOH and Ir1/Co0.8Cu0.2OOH. Theoretical calculations further showed that the presence of cationic vacancies in Ir1/Co0.8Cu0.2OOH elongates the interaction distance between atomic iridium species and one of the key intermediates, ∗OH, leading to distinct adsorptions of ∗OH and ∗OOH. Consequently, Ir1/Co0.8Cu0.2OOH overcome the theoretical minimum energy barrier of 370 mV toward OER under scaling relation, presenting a lower theoretical overpotential barrier of 310 mV.
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