析氧
无定形固体
材料科学
钴
催化作用
分解水
无定形碳
碳纤维
化学工程
电子转移
动力学
电极
电化学
化学
光化学
物理化学
光催化
结晶学
冶金
生物化学
物理
复合材料
量子力学
复合数
工程类
作者
Hongda Li,Kaikai Ba,Kai Zhang,Yanhong Lin,Wanchun Zhu,Tengfeng Xie
摘要
The development of photoelectrochemical (PEC) water splitting is hindered by the slow kinetics of four-electron processes for the oxygen evolution reaction (OER) and severe charge recombination. Amorphous carbon was chosen as a carrier for the active sites due to its exceptional conductivity and strong loading capacity. In addition, this enhanced performance was attributed to the loading of oxides of cobalt. Here, amorphous carbon-covered cobalt oxides chosen as a co-catalyst loaded on α-Fe2O3 (noted as CoOx@C/Ti-Fe2O3) have been synthesized, and they show a high current density (2.86 mA cm-2 under 1.23 V vs. RHE), and a low onset potential (0.611 V vs. RHE). Experimental analysis demonstrates that the charge transfer and separation leading to accelerated OER dynamics and improved PEC performance are enhanced by CoOx@C effectively. This study provides new ideas for designing high-performance photoelectrochemical electrodes based on amorphous carbon co-catalysts.
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