光催化
选择性
化学计量学
材料科学
兴奋剂
辐照
催化作用
水溶液
电子转移
碳纤维
钛矿
核化学
分析化学(期刊)
无机化学
光化学
化学
物理化学
光电子学
冶金
有机化学
核物理学
复合材料
物理
复合数
石英
作者
Shuying Wang,Kentaro Teramura,Takashi Hisatomi,Kazunari Domen,Hiroyuki Asakura,Saburo Hosokawa,Tsunehiro Tanaka
出处
期刊:ACS applied energy materials
[American Chemical Society]
日期:2020-02-03
卷期号:3 (2): 1468-1475
被引量:57
标识
DOI:10.1021/acsaem.9b01927
摘要
Al-doped strontium titanite (Al–SrTiO3) containing numerous stepwise edges on the surface was found to exhibit an excellent performance in the photocatalytic conversion of CO2 by H2O as an electron donor under photoirradiation at >300 nm with Ag modification, while in contrast, the Ag-loaded pristine SrTiO3 was inactive as a photocatalyst for this reaction. CO was stably evolved as the main reduction product at a rate of 7.2 μmol h–1 over the Ag-loaded Al–SrTiO3, and a small amount of H2 was generated during the three runs. The selectivity of electrons generated by charge transfer toward CO evolution was ∼98.0%. In addition, the stoichiometric formation of O2 was observed, indicating that H2O acts as an electron donor for the reduction of CO2. Furthermore, isotopic experiments performed using 13CO2 revealed that the CO product is derived from CO2 bubbled into an aqueous solution of NaHCO3 and not from residual carbon species on the catalyst surface.
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