Selective CO production by Au coupled ZnTe/ZnO in the photoelectrochemical CO2 reduction system

被引：156

作者：

Jang, Youn Jeong ^{[1
]}

Jang, Ji-Wook ^{[2
]}

Lee, Jaehyuk ^{[1
]}

Kim, Ju Hun ^{[1
]}

Kumagai, Hiromu ^{[3
]}

Lee, Jinwoo ^{[1
]}

Minegishi, Tsutomu ^{[3
]}

Kubota, Jun ^{[3
]}

Domen, Kazunari ^{[3
]}

Lee, Jae Sung ^{[2
]}

机构：

[1] Pohang Univ Sci & Technol POSTECH, Dept Chem Engn, Pohang 790784, South Korea

[2] Ulsan Natl Inst Sci & Technol, Dept Energy & Chem Engn, Ulsan 689798, South Korea

[3] Univ Tokyo, Dept Chem Syst Engn, Bunkyo Ku, Tokyo 1138656, Japan

来源：

ENERGY & ENVIRONMENTAL SCIENCE | 2015年 / 8卷 / 12期

基金：

新加坡国家研究基金会;

关键词：

AQUEOUS CARBON-DIOXIDE; ELECTROCHEMICAL REDUCTION; GOLD NANOPARTICLES; METAL-ELECTRODES; WORK FUNCTION; METHANOL;

D O I：

10.1039/c5ee01445j

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A gold-coupled ZnTe/ZnO-nanowire array is a new photocathode for selective CO2 reduction to CO. At -0.7 V-RHE under simulated 1 sun illumination, its photocurrent (-16.0 mA cm(-2)) and incident photon-to-current conversion efficiency (97%) represent the highest among reported ZnTe photocathodes for CO2 reduction and dramatic enhancement from those of a bare electrode (-7.9 mA cm(-2), 68%). In addition, the Au nanoparticles convert mainly-hydrogen-producing bare ZnTe/ZnO-nanowires into mainly-CO-producing photocathodes in photoelectrochemical CO2 reduction. The remarkable effects of the Au co-catalyst originate from the formation of a Schottky junction with ZnTe to improve charge separation and to provide reaction centers for CO2 reduction suppressing competing water reduction.

引用

页码：3597 / 3604

页数：8

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