標題: Ni-Nanocluster Modified Black TiO2 with Dual Active Sites for Selective Photocatalytic CO2 Reduction
作者: Billo, Tadesse
Fu, Fang-Yu
Raghunath, Putikam
Shown, Indrajit
Chen, Wei-Fu
Lien, Hsiang-Ting
Shen, Tzu-Hsien
Lee, Jyh-Fu
Chan, Ting-Shan
Huang, Kuo-You
Wu, Chih-I
Lin, M. C.
Hwang, Jih-Shang
Lee, Chih-Hao
Chen, Li-Chyong
Chen, Kuei-Hsien
應用化學系
Department of Applied Chemistry
關鍵字: artificial photosynthesis;black TiO2;photocatalytic CO2 reduction;solar fuels
公開日期: 11-Jan-2018
摘要: One of the key challenges in artificial photosynthesis is to design a photocatalyst that can bind and activate the CO2 molecule with the smallest possible activation energy and produce selective hydrocarbon products. In this contribution, a combined experimental and computational study on Ni-nanocluster loaded black TiO2 (Ni/TiO2[Vo]) with built-in dual active sites for selective photocatalytic CO2 conversion is reported. The findings reveal that the synergistic effects of deliberately induced Ni nanoclusters and oxygen vacancies provide (1) energetically stable CO2 binding sites with the lowest activation energy (0.08 eV), (2) highly reactive sites, (3) a fast electron transfer pathway, and (4) enhanced light harvesting by lowering the bandgap. The Ni/TiO2[Vo] photocatalyst has demonstrated highly selective and enhanced photocatalytic activity of more than 18 times higher solar fuel production than the commercial TiO2 (P-25). An insight into the mechanisms of interfacial charge transfer and product formation is explored.
URI: http://dx.doi.org/10.1002/smll.201702928
http://hdl.handle.net/11536/144358
ISSN: 1613-6810
DOI: 10.1002/smll.201702928
期刊: SMALL
Volume: 14
Appears in Collections:Articles