Metal organic framework-ionic liquid hybrid catalysts for the selective electrochemical reduction of CO2 to CH4

被引：34

作者：

Delmo, Ernest Pahuyo ^{[1
]}

Wang, Yian ^{[1
]}

Wang, Jing ^{[1
,2
]}

Zhu, Shangqian ^{[1
]}

Li, Tiehuai ^{[1
]}

Qin, Xueping ^{[1
]}

Tian, Yibo ^{[1
]}

Zhao, Qinglan ^{[1
]}

Jang, Juhee ^{[1
]}

Wang, Yinuo ^{[1
]}

Gu, Meng ^{[2
]}

Zhang, Lili ^{[3
]}

Shao, Minhua ^{[1
,4
,5
]}

机构：

[1] Hong Kong Univ Sci & Technol, Dept Chem & Biol Engn, Kowloon, Clear Water Bay, Hong Kong, Peoples R China

[2] Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Guangdong, Peoples R China

[3] Huaiyin Normal Univ, Jiangsu Key Lab Chem Low Dimens Mat, Huaian 223300, Jiangsu, Peoples R China

[4] Hong Kong Univ Sci & Technol, Energy Inst, Kowloon, Clear Water Bay, Hong Kong, Peoples R China

[5] Hong Kong Univ Sci & Technol, Chinese Natl Engn Res Ctr Control & Treatment Hea, Kowloon, Clear Water Bay, Hong Kong, Peoples R China

来源：

CHINESE JOURNAL OF CATALYSIS | 2022年 / 43卷 / 07期

关键词：

Methane; Room temperature ionic liquid; Metal organic framework; Catalyst design; DFT calculation; CO(2 )electroreduction; CARBON-DIOXIDE; OXYGEN REDUCTION; CONVERSION; ELECTROREDUCTION; HKUST-1; WATER; ACID;

D O I：

10.1016/S1872-2067(21)63970-0

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

The electrochemical reduction of CO2 towards hydrocarbons is a promising technology that can utilize CO2 and prevent its atmospheric accumulation while simultaneously storing renewable energy. However, current CO2 electrolyzers remain impractical on a large scale due to the low current densities and faradaic efficiencies (FE) on various electrocatalysts. In this study, hybrid HKUST-1 metal-organic framework???fluorinated imidazolium-based room temperature ionic liquid (RTIL) electrocatalysts are designed to selectively reduce CO2 to CH4. An impressive FE of 65.5% towards CH4 at ???1.13 V is achieved for the HKUST-1/[BMIM][PF6] hybrid, with a stable FE greater than 50% maintained for at least 9 h in an H-cell. The observed improvements are attributed to the increased local CO2 concentration and the improved CO2-to-CH4 thermodynamics in the presence of the RTIL molecules adsorbed on the HKUST-1-derived Cu clusters. These findings offer a novel approach of immobilizing RTIL co-catalysts within porous frameworks for CO2 electroreduction applications. Published by Elsevier B.V. All rights reserved.

引用

页码：1687 / 1696

页数：10

共 54 条

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