Metal-organic framework derived dual-metal sites for electroreduction of carbon dioxide to HCOOH
Yao, Kaili 1Wang, Haibin 1Yang, Xiaotao 1Huang, Yan 1Kou, Chendong 1Jing, Tan 2Chen, Songhua 2Wang, Ziyun 3Liu, Yongchang 1Liang, Hongyan1
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作者信息
1. Tianjin Univ
2. Longyan Univ
3. Univ Auckland
折叠
Abstract
The electrochemical CO2 reduction to formic acid (HCOOH) by Bi-based catalysts has been considered an effective way to solve the energy and environmental crisis. However, achieving high selectivity, high current density, and long-term stability for HCOOH production, remains a substantial challenge. Herein, BiIn alloy nanoparticles (NPs), deriving from the bimetallic metal-organic frameworks, exhibit an excellent HCOOH Faradaic efficiency (FEHCOOH) of 92.5% at the current density of 300 mA cm(-2), as well as a production rate of 5170 mu mol h(-1) cm(-2). Moreover, the BiIn alloy NPs also achieve superior stability that over 25 h with less than 10% FE drop at the current density of 120 mA cm(-2) in a membrane electrode assembly system. In-situ spectra and theoretical calculations suggest that the Bi-In dual-metal sites can provide the optimal binding energy to *OCHO intermediate, thus accelerating the CO2 to HCOOH conversion.
Key words
Electrocatalytic CO2 reduction/Metal-organic framework/Dual-metal sites/HCOOH/CO2 REDUCTION/BISMUTH/TRANSFORMATION/SYSTEMS
NSTL
Elsevier