Surface electronic state modulation promotes photoinduced aggregation and oxidation of trace CO for lossless purification of H2 stream

Liu, Haifeng1,3; Huang, Xiang2; Chen, Jiazang1,3

2023-08-01

10.1016/S1872-2067(23)64483-3

CHINESE JOURNAL OF CATALYSIS   影响因子和分区

0253-9837

1872-2067

Although photogenerated hydroxyl radicals can oxidize CO without H-2 consumption, the nonselective collision severely lowers photocatalytic photon utilization. We here demonstrate that electronic state modification of TiO2 resulted from magnesium doping can promote hydroxyl radical generation by weakening the adsorption of oxygen species and facilitating semiconductor-cocatalyst interfacial electron transfer. Importantly, the partial deprivation of electronic cloud from cationic sites can strengthen sigma-donation and pi-backdonation that synergistically promote the electrostatic interaction for aggregating CO in the vicinity of semiconductor. The resulted photocatalyst thus exhibits growing superiority over common counterpart in target reaction as CO concentration lowers. By these merits, CO in H-2 stream can be reduced to < 1 x 10(-6) with efficient photon utilization.(c) 2023, Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved.

Electronic states Hydroxyl radical Carbon monoxide oxidation Hydrogen purification Photocatalytic fixed bed reaction

SCI

英语

通讯

Chemistry ; Engineering

Chemistry, Applied ; Chemistry, Physical ; Engineering, Chemical

WOS:001136284000001

ELSEVIER

CHEMISTRY

Web of Science

1.Chinese Acad Sci, State Key Lab Coal Convers, Inst Coal Chem, Taiyuan 030001, Shanxi, Peoples R China
2.Southern Univ Sci & Technol, Dept Phys, Shenzhen 518055, Guangdong, Peoples R China
3.Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China

Liu, Haifeng,Huang, Xiang,Chen, Jiazang. Surface electronic state modulation promotes photoinduced aggregation and oxidation of trace CO for lossless purification of H2 stream[J]. CHINESE JOURNAL OF CATALYSIS,2023,51.

Liu, Haifeng,Huang, Xiang,&Chen, Jiazang.(2023).Surface electronic state modulation promotes photoinduced aggregation and oxidation of trace CO for lossless purification of H2 stream.CHINESE JOURNAL OF CATALYSIS,51.

Liu, Haifeng,et al."Surface electronic state modulation promotes photoinduced aggregation and oxidation of trace CO for lossless purification of H2 stream".CHINESE JOURNAL OF CATALYSIS 51(2023).