析氧
过电位
异质结
氧化还原
分解水
拉曼光谱
电子转移
氧气
化学
化学工程
材料科学
催化作用
电化学
无机化学
光化学
光催化
物理化学
电极
光电子学
生物化学
物理
有机化学
光学
工程类
作者
Feng Zhou,JiaDong Chen,Yun Yang,Xiaoxue Ke,Liang Xue,Lijie Zhang,Jun Li,Lianghao Yu,Shun Wang,Ying Li,Chenliang Su
标识
DOI:10.1016/j.apsusc.2023.158508
摘要
Development of Ru-based electrocatalysts for acidic oxygen evolution reaction without a trade-off between activity and durability remains challenging. Herein, we constructed Co3O4/RuO2 heterojunctions anchored on carbon (Co3O4/RuO2-C) with a low Ru loading (2.74 wt%), in which strong coupled p-n junctions facilitated electron transfer from RuO2 to Co3O4. The Co3O4/RuO2-C demonstrated a low overpotential of 170 mV at 10 mA cm−2 and long-term stability in 0.1 M HClO4 due to its unique structure. The origin of its high performance in acidic OER was revealed by the combination of in-situ attenuated total reflection infrared and Raman tests. Concretely, oxygen generation for Co3O4/RuO2-C was dominated by the adsorbate evolution mechanism, and the introduction of Co3O4 facilitated the redox of RuO2, generating active sites for OER. Theoretical calculations further substantiated that the Co3O4/RuO2 heterojunctions possessed lower energy barriers for OER. This work provides a compelling synthesis route for effective and stable electrocatalysts for acidic OER.
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