Photoelectrochemical CO2 reduction to adjustable syngas on grain-boundary-mediated a-Si/TiO2/Au photocathodes with low onset potentials

doi:10.1039/c8ee02768d

	Photoelectrochemical CO2 reduction to adjustable syngas on grain-boundary-mediated a-Si/TiO2/Au photocathodes with low onset potentials
	Li, Chengcheng 2; Wang, Tuo 2; Liu, Bin 2; Chen, Mengxin 2; Li, Ang 2; Zhang, Gong 2; Du, Minyong 1; Wang, Hui 1; Liu, Shengzhong Frank 1; Gong, Jinlong 2
刊名	ENERGY & ENVIRONMENTAL SCIENCE
	2019-03-01
卷号	12 期号:3 页码:923-928
ISSN号	1754-5692
DOI	10.1039/c8ee02768d
通讯作者	Gong, Jinlong(jlgong@tju.edu.cn)
英文摘要	A photoelectrochemical (PEC) CO2 reduction reaction (CRR) in an aqueous medium is among the most promising methods to produce renewable fuels with the sun and water as the energy and electron source. But a high negative bias remains a prerequisite to achieve an appreciable conversion at present due to the large overpotential of CO2 reduction. This communication describes a PEC CRR with low onset potential on an amorphous silicon (a-Si) photocathode decorated with grain-boundary-rich gold catalysts. Syngas, with high throughput and desirable CO/H2 ratios such as 1 : 2 and 1 : 1, was produced in a wide PEC range from the equilibrium potential E-0(CO2/CO) of -0.1 V vs. the reversible hydrogen electrode (V-RHE) to as positive as 0.4 V-RHE, leading to a half-cell conversion efficiency of 0.42%. This performance represents the highest half-cell efficiency and lowest onset potential for CO2 reduction ever reported among aqueous PEC cathodes under 1 sun illumination. The a-Si/TiO2/Au photocathodes exhibit excellent stability in a wide potential range, with a high CO mass activity up to 180 ampere per gram of gold at -0.1 V-RHE. Controlling the grain boundary provides powerful potential to adjust the product selectivity in PEC CO2 reduction.
资助项目	National Key R&D Program of China[2016YFB0600901] ; National Natural Science Foundation of China[21525626] ; National Natural Science Foundation of China[U1463205] ; National Natural Science Foundation of China[U1662111] ; National Natural Science Foundation of China[21722608] ; National Natural Science Foundation of China[51861125104] ; Program of Introducing Talents of Discipline to Universities[B06006]
WOS关键词	AMORPHOUS-SILICON PHOTOCATHODES ; CARBON-DIOXIDE ; SOLAR ; ELECTROREDUCTION ; EFFICIENT ; TIO2 ; AU ; CATALYSTS ; LAYER ; PHOTOCATALYSTS
WOS研究方向	Chemistry ; Energy & Fuels ; Engineering ; Environmental Sciences & Ecology
语种	英语
出版者	ROYAL SOC CHEMISTRY
WOS记录号	WOS:000462661900022
资助机构	National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Program of Introducing Talents of Discipline to Universities ; Program of Introducing Talents of Discipline to Universities ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Program of Introducing Talents of Discipline to Universities ; Program of Introducing Talents of Discipline to Universities ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Program of Introducing Talents of Discipline to Universities ; Program of Introducing Talents of Discipline to Universities ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Program of Introducing Talents of Discipline to Universities ; Program of Introducing Talents of Discipline to Universities
内容类型	期刊论文
源URL	[http://cas-ir.dicp.ac.cn/handle/321008/165768]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
通讯作者	Gong, Jinlong
作者单位	1.Chinese Acad Sci, Dalian Natl Lab Clean Energy, Dalian Inst Chem Phys, iChEM, Dalian 116023, Peoples R China 2.Tianjin Univ, Sch Chem Engn & Technol, Collaborat Innovat Ctr Chem Sci & Engn Tianjin, Minist Educ,Key Lab Green Chem Technol, Tianjin 300072, Peoples R China
推荐引用方式 GB/T 7714	Li, Chengcheng,Wang, Tuo,Liu, Bin,et al. Photoelectrochemical CO2 reduction to adjustable syngas on grain-boundary-mediated a-Si/TiO2/Au photocathodes with low onset potentials[J]. ENERGY & ENVIRONMENTAL SCIENCE,2019,12(3):923-928.
APA	Li, Chengcheng.,Wang, Tuo.,Liu, Bin.,Chen, Mengxin.,Li, Ang.,...&Gong, Jinlong.(2019).Photoelectrochemical CO2 reduction to adjustable syngas on grain-boundary-mediated a-Si/TiO2/Au photocathodes with low onset potentials.ENERGY & ENVIRONMENTAL SCIENCE,12(3),923-928.
MLA	Li, Chengcheng,et al."Photoelectrochemical CO2 reduction to adjustable syngas on grain-boundary-mediated a-Si/TiO2/Au photocathodes with low onset potentials".ENERGY & ENVIRONMENTAL SCIENCE 12.3(2019):923-928.