Ni-foam-supported and amine-functionalized TiO2 photocathode improved photoelectrocatalytic reduction of CO2 to methanol

被引：35
|
作者：
Wang, Liwen [1 ]
Jia, Yongjian [1 ]
Nie, Rong [1 ]
Zhang, Yuqian [1 ]
Chen, Fengjuan [1 ]
Zhu, Zhenping [2 ]
Wang, Jianguo [2 ]
Jing, Huanwang [1 ,2 ]
机构：
[1] Lanzhou Univ, Coll Chem & Chem Engn, State Key Lab Appl Organ Chem, Lanzhou 730000, Peoples R China
[2] Chinese Acad Sci, Inst Coal Chem, State Key Lab Coal Convers, Taiyuan 030001, Peoples R China
来源：
JOURNAL OF CATALYSIS | 2017年 / 349卷
基金：
中国国家自然科学基金;
关键词：
Ni foam; Light quantum efficiency; CO2; reduction; Covalent ligand; Isotopic labeling experiments; METAL-ORGANIC FRAMEWORKS; CARBON-DIOXIDE; ELECTROCHEMICAL REDUCTION; ELECTROCATALYTIC REDUCTION; PHOTOCATALYTIC REDUCTION; AQUEOUS-SOLUTION; NANOPARTICLES; CONVERSION; SURFACES; ALLOY;
D O I：
10.1016/j.jcat.2017.01.013
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
We report new insights into the photoelectrochemical reduction of CO2 in a photoelectrochemical system, which is assembled from a nickel foam covered with TiO2 modified by covalent ligands as photocathode and BiVO4 as photoanode. These photoelectrocatalytic cells generate mainly methanol as a product in the liquid phase. Our results show that imine-functionalized TiO2/Ni has the highest activity. The formation rate of methanol in this excellent cell is up to 153 mu M/h.cm(2), which is about 15 times higher than that of the TiO2/Ni electrode. If the Faradaic efficiency is considered as 100%, the light quantum efficiency of this cell reaches 1.2%, that is two times better than that of plants. Isotopic labeling experiments with (CO2)-C-13 confirm that the detected products are produced exclusively by the reduction of CO2 and water splitting. (C) 2017 Elsevier Inc. All rights reserved.
引用
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页码：1 / 7
页数：7
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