文献类型：期刊文献

英文题名：Oxygen-Vacancy-Activated CO2 Splitting over Amorphous Oxide Semiconductor Photocatalyst

作者：Wang, Bing[1];Wang, Xiaohui[2];Lu, Lei[2];Zhou, Chenguang[2];Xi, Zhenyu[2];Wang, Jiajia[3];Ke, Xiao-kang[4];Sheng, Guodong[5];Yan, Shicheng[2];Zou, Zhigang[1,2]

机构：[1]Nanjing Univ, Dept Phys, Natl Lab Solid State Microstruct, Jiangsu Key Lab Nano Technol, 22 Hankou Rd, Nanjing 210093, Jiangsu, Peoples R China;[2]Nanjing Univ, Coll Engn & Appl Sci, Collaborat Innovat Ctr Adv Microstruct, Ecomat & Renewable Energy Res Ctr ERERC, 22 Hankou Rd, Nanjing 210093, Jiangsu, Peoples R China;[3]Hohai Univ, Coll Mech & Mat, Nanjing 211100, Jiangsu, Peoples R China;[4]Nanjing Univ, Sch Chem & Chem Engn, Nanjing 210093, Jiangsu, Peoples R China;[5]Shaoxing Univ, Sch Chem & Chem Engn, Shaoxing 312000, Peoples R China

年份：2018

卷号：8

期号：1

起止页码：516

外文期刊名：ACS CATALYSIS

收录：SCI-EXPANDED(收录号：WOS:000419751100051)、、WOS

基金：This work was supported primarily by the National Basic Research Program of China (2013CB632404), the National Natural Science Foundation of China (51572121, 21603098 and 21633004), the State Key Laboratory of NBC Protection for Civilian (SKLNBC2014-09), the Natural Science Foundation of Jiangsu Province (BK20151265, BK20151383, and BK20150580), the Fundamental Research Funds for the Central Universities (021314380084), and the Postdoctoral Science Foundation of China (2017M611784). We are grateful to the High Performance Computing Center (HPCC) of Nanjing University for doing the numerical calculations in this paper on its IBM Blade cluster system. This work has benefited from the hard X-ray micro-analysis and spherical grating monochromator beamlines at CLS and the BL14W1 beamline at the Shanghai Synchrotron Radiation Facility (SSRF).

语种：英文

外文关键词：CO2 splitting; photocatalysis; photocorrosion; amorphous photocatalyst; defect reaction

外文摘要：Gaseous oxides generated during industrial processes, such as carbon oxides (COx) and nitrogen oxides (NOx), have important effects on the Earth's atmosphere. It is highly desired to develop a low-cost and efficient route to convert them to harmless products. Here, direct splitting of gaseous oxides was proposed on the basis of photocatalysis by an amorphous oxide semiconductor. As an example, splitting of CO2 into carbon and oxygen was achieved over amorphous zinc germanate (alpha-Zn-Ge-O) semiconductor photocatalyst under 300 W Xe lamp irradiation. Electron paramagnetic resonance and O-18 isotope labeling indicated that the splitting of CO2 was achieved via photoinduced oxygen vacancies on alpha-Zn-Ge-O reacting and thus filling with O of CO2, while the photogenerated electrons reduced the carbon species of CO2 to solid carbon. Under irradiation, such a defect reaction is sustainable by continuous photogenerated hole oxidation of surface oxygen atoms on a-Zn-Ge-O to form oxygen vacancies and to release O-2. When we used H2O or NO in place of CO2, H-2 and O-2 or N-2 and O-2 were evolved, respectively, indicating the same mechanism can also split H2O or NO.