Photothermal Catalytic Water Splitting at Diverse Two-Phase Interfaces Based on Cu-TiO2

被引:16
|
作者
Zhang, Xuhan [1 ]
Xu, Chenyu [2 ]
Zhang, Li [1 ]
Li, Zheng [1 ]
Hong, Jianan [1 ]
Zhang, Yanwei [1 ]
机构
[1] Zhejiang Univ, Dept Energy Engn, State Key Lab Clean Energy Utilizat, Hangzhou 310027, Peoples R China
[2] Univ Alberta, Dept Chem & Mat Engn, Edmonton, AB T6G 1H9, Canada
基金
中国国家自然科学基金;
关键词
photothermal catalysis; water splitting; hydrogen production; Cu-modified TiO2; solar energy; PHOTO-THERMOCHEMICAL CYCLE; TOTAL-ENERGY CALCULATIONS; HYDROGEN GENERATION; TIO2; CO2; CONVERSION; CU; PHOTOCATALYSTS; EFFICIENCY; REDUCTION;
D O I
10.1021/acsaem.2c00009
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Wasted high-temperature water from power plants or industrial boilers for photothermal catalytic water splitting reactions may be used to produce solar fuel and provide high-temperature heat to achieve solar-energy cascade utilization. Cu-modified TiO2 was used for the overall photothermal catalytic water splitting reaction, resulting in a hydrogen-oxygen ratio of approximately 2:1. The liquid-solid interface reaction yield was up to 10 times that of the gas-solid interface at the same reaction temperature. With the Cu modification, the photoresponse was improved, the energy barrier of the rate-determining step was reduced, and the water splitting reaction was promoted. As the copper content increased, Cu elements changed from a low valence state to an oxidized state. Moreover, the effect of temperature on the reaction was also explored. Increasing the temperature reduced the energy barrier of the rate-determining step and reduced the charge-transfer resistance, which explains the positive correlation between the hydrogen yield and temperature.
引用
收藏
页码:4564 / 4576
页数:13
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