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UV Laser Regulation of Surface Oxygen Vacancy of CoFe2O4 for Enhanced Oxygen Evolution Reaction
Zhen-hong Xiao1,2, Dao-chuan Jiang2, Han Xu1,2, Jing-tian Zhou1,2, Qi-zhong Zhang1,2, Ping-wu Du2, Zhen-lin Luo*1,2, Chen Gao1,2
1.National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230026, China;2.CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026, China
Abstract:
Oxygen evolution reaction is one of the key processes in the promising renewable energy technique of electrocatalytic water splitting. Developing high effcient oxygen evolution reaction (OER) catalysts requires determination of the optimal values of the descriptor parameters. Using spinel CoFe2O4 as the model catalyst, this work demonstrates that irradiation with pulsed UV laser can control the quantity of surface oxygen vacancy and thus modify the OER activity, in a volcano-shape evolution trend. This strategy sheds light on quantita-tively investigation of the relationship between surface cation valence, anion vacancy, and physicochemical properties of transition-metal-based compounds.
Key words:  Oxygen evolution reaction, Spinel oxide, Transition metal oxide, Laser irradiation, Oxygen vacancy
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附件
紫外激光调控CoFe2O4表面氧空位以增强析氧反应催化活性
肖振宏1,2, 江道传2, 徐 晗1,2, 周靖添1,2, 张琦忠1,2, 杜平武2, 罗震林*1,2, 高 琛1,2
1.中国科学技术大学国家同步辐射实验室,合肥 230029;2.中国科学技术大学材料科学与工程系,中国科学院能量转换材料重点实验室,合肥 230026
摘要:
本文以尖晶石型材料CoFe2O4为模型催化剂,研究证实脉冲紫外激光辐照可以有效调控材料表面的氧空位含量,进而改变其析氧催化活性,得到了催化活性随辐照时间的火山型变化趋势. 这种激光辐照方法可用于定量研究过渡金属化合物的表面阳离子价态、阴离子空位和物化性质间的关联.
关键词:  析氧反应,尖晶石氧化物,过渡金属氧化物,激光辐照,氧空位
DOI:10.1063/1674-0068/31/cjcp1804058
分类号: