Selectivity Modulated by Surface Ligands on Cu2O/TiO2 Catalysts for Gas-Phase Photocatalytic Reduction of Carbon Dioxide

被引：32

作者：

Jeong, Sunil ^{[1
]}

Kim, Gui-Min ^{[1
]}

Kang, Gil-Seong ^{[1
,5
]}

Kim, Chanyeon ^{[1
]}

Lee, Hyunjoo ^{[1
]}

Kim, Woo-Jae ^{[6
]}

Lee, Young Kuk ^{[7
]}

Lee, Sungho ^{[5
]}

Kim, Hyungjun ^{[2
,3
]}

Lim, Hyung Kyu ^{[4
]}

Lee, Doh C. ^{[1
]}

机构：

[1] Korea Adv Inst Sci & Technol, Inst Nanocentury, Dept Chem & Biomol Engn, Daejeon 34141, South Korea

[2] Korea Adv Inst Sci & Technol, Dept Chem, Daejeon 34141, South Korea

[3] Korea Adv Inst Sci & Technol, Grad Sch EEWS, Daejeon 34141, South Korea

[4] Kangwon Natl Univ, Div Chem & Bioengn, Chunchon 24341, Gangwondo, South Korea

[5] KIST, Carbon Composite Mat Res Ctr, Wonju 55324, Jeollabukdo, South Korea

[6] Ewha Womans Univ, Dept Chem Engn & Mat Sci, Seoul 03760, South Korea

[7] KRICT, Adv Mat Div, Daejeon 34114, South Korea

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2019年 / 123卷 / 48期

基金：

新加坡国家研究基金会;

关键词：

CO2; PHOTOREDUCTION; VISIBLE-LIGHT; CONVERSION; TIO2; CU; NANOPARTICLES; NANOCRYSTALS; ADSORPTION; H2O; AU;

D O I：

10.1021/acs.jpcc.9b05780

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 gas-phase photocatalytic CO2 reduction with Cu2O/TiO2 photocatalysts of varying surface passivation. With taurine adsorbed on the photocatalyst surface, the CH4 production rate increases and CO production rate decreases compared to photocatalysts with no ligand treatment. When ethylenediamine is present on Cu2O/TiO2 photocatalysts, CO selectivity enhances significantly. In situ Fourier transform infrared spectroscopy and density functional theory calculation reveal that the surface ligands on the photocatalyst surface alter the binding strength of reaction intermediates (e.g., CO) on surface atoms of the photocatalysts. Our findings cast light on a new design principle for the catalyst surface in selective CO2 conversion.

引用

页码：29184 / 29191

页数：8

共 40 条

[1] Cu2O/TiO2 heterostructures for CO2 reduction through a direct Z-scheme: Protecting Cu2O from photocorrosion [J].