Selective CO Production in Photoelectrochemical Reduction of CO2 with a Cobalt Chlorin Complex Adsorbed on Multiwalled Carbon Nanotubes in Water

被引：38

作者：

Aoi, Shoko ^{[1
]}

Mase, Kentaro ^{[1
]}

Ohkubo, Kei ^{[2
]}

Suenobu, Tomoyoshi ^{[1
]}

Fukuzumi, Shunichi ^{[3
,4
]}

机构：

[1] Osaka Univ, Grad Sch Engn, Dept Mat & Life Sci, Japan Sci & Technol Agcy JST,SENTAN, Suita, Osaka 5650871, Japan

[2] Osaka Univ, Inst Acad Initiat, Div Innovat Res Drug Dev, Suita, Osaka 5650871, Japan

[3] Ewha Womans Univ, Dept Chem & Nano Sci, Seoul 120750, South Korea

[4] Meijo Univ, Japan Sci & Technol Agcy JST, SENTAN, Fac Sci & Technol, Nagoya, Aichi 4688502, Japan

来源：

ACS ENERGY LETTERS | 2017年 / 2卷 / 03期

关键词：

ELECTROCHEMICAL REDUCTION; BISMUTH VANADATE; MOLECULAR CATALYST; HIGHLY EFFICIENT; SOLAR FUELS; DIOXIDE; PHOTOANODE; CONVERSION; BIVO4; PHOTOCATHODES;

D O I：

10.1021/acsenergylett.6b00630

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：

Photoelectrochemical reduction of CO2 occurred using cobalt(II) chlorin (Co-II(Ch)) as a cathode active material adsorbed on multiwalled carbon nanotubes as a current collector in combination with a surface-modified BiVO4 photoanode with iron(III) oxide(hydroxide), FeO(OH), to produce CO with 83% Faradaic efficiency at an applied bias voltage of -1.3 V at the Co-II(Ch)-modified cathode vs the FeO(OH)/BiVO4/FTO photo anode under visible light irradiation in a CO2-saturated aqueous solution (pH 4.6). The difference in the oxidation potential of the FeO(OH)/BiVO4/FTO electrode under dark and that under light illumination was similar to 1.5 V, which was smaller than the band gap of BiVO4 (band gap energy approximate to 2.4 eV), indicating that the FeO(OH)/ BiVO4/FTO photoanode lowered the total bias that enabled simultaneous water oxidation and CO2 reduction.

引用

页码：532 / 536

页数：5

共 32 条

[1] Electrocatalytic conversion of CO2 to produce solar fuels in electrolyte or electrolyte-less configurations of PEC cells [J].