Ultrathin Co3O4 Layers Realizing Optimized CO2 Electroreduction to Formate

被引：446

作者：

Gao, Shan ^{[1
]}

Jiao, Xingchen ^{[1
]}

Sun, Zhongti ^{[1
]}

Zhang, Wenhua ^{[1
]}

Sun, Yongfu ^{[1
]}

Wang, Chengming ^{[1
]}

Hu, Qitao ^{[1
]}

Zu, Xiaolong ^{[1
]}

Yang, Fan ^{[1
]}

Yang, Shuyang ^{[1
]}

Liang, Liang ^{[1
]}

Wu, Ju ^{[1
]}

Xie, Yi ^{[1
]}

机构：

[1] Univ Sci & Technol China, Collaborat Innovat Ctr Chem Energy Mat, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Anhui, Peoples R China

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2016年 / 55卷 / 02期

关键词：

atomic layers; CO2; electroreduction; cobalt oxide; formate; OXIDE POROUS SHEETS; CARBON-DIOXIDE; ELECTROCHEMICAL REDUCTION; SELECTIVE CONVERSION; ELECTRODES; CATALYST; MONOXIDE;

D O I：

10.1002/anie.201509800

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Electroreduction of CO2 into hydrocarbons could contribute to alleviating energy crisis and global warming. However, conventional electrocatalysts usually suffer from low energetic efficiency and poor durability. Herein, atomic layers for transition-metal oxides are proposed to address these problems through offering an ultralarge fraction of active sites, high electronic conductivity, and superior structural stability. As a prototype, 1.72 and 3.51 nm thick Co3O4 layers were synthesized through a fast-heating strategy. The atomic thickness endowed Co3O4 with abundant active sites, ensuring a large CO2 adsorption amount. The increased and more dispersed charge density near Fermi level allowed for enhanced electronic conductivity. The 1.72 nm thick Co3O4 layers showed over 1.5 and 20 times higher electrocatalytic activity than 3.51 nm thick Co3O4 layers and bulk counterpart, respectively. Also, 1.72 nm thick Co3O4 layers showed formate Faradaic efficiency of over 60% in 20 h.

引用

页码：698 / 702

页数：5

共 27 条

[1]

[Anonymous], 2012, ANGEW CHEM

[2] Aqueous CO2 Reduction at Very Low Overpotential on Oxide-Derived Au Nanoparticles [J].