A nickel-nitrogen-doped carbon foam as monolithic electrode for highly efficient CO2 electroreduction. Issue 49 (July 2021)

• Record Type: Journal Article
• Authors: Zhao, Shijia; Xiao, Nan; Li, Hongqiang; Guo, Zhen; Bai, Jinpeng; Xiao, Jian; Guo, Hongda; Ma, Xiaoqing; Qiu, Jieshan
• Is Part Of: Journal of CO₂ utilization. Issue 49(2021)
• Publication Date: 2021-07
• Subjects: Electrochemical CO2 reduction -- Coal tar pitch -- Carbon foam -- Monolithic electrode -- Ni-Nx active sites; Carbon dioxide -- Periodicals; Carbon dioxide -- Environmental aspects -- Periodicals; Carbon dioxide mitigation -- Periodicals; Carbon dioxide; Carbon dioxide -- Environmental aspects; Carbon dioxide mitigation; Periodicals; 628.53205
• DOI: 10.1016/j.jcou.2021.101549
• Languages: English
• ISSNs: 2212-9820

Abstract

Graphical abstract: Highlights: A monolithic electrocatalyst by combining carbon foam with Ni-Nx active sites is prepared. The monolithic electrocatalyst possesses high conductivity, low mass transfer resistance and abundant active sites. The electrocatalyst exhibits a large partial current density (71.6 mA cm −2 ) under high Faradaic efficiency of CO over 90 %. Abstract: Carbon materials are considered as one of the most promising electrocatalysts for the electrochemical CO2 reduction which can convert CO2 to value-added chemical products in a clean, cheap and efficient manner. However, the carbon-based catalysts still suffer from low partial current density under high Faradaic efficiency of products, which results from their poor intrinsic electrocatalytic activity and the use of insulating binders. Herein, we design a novel monolithic electrocatalyst by combining the carbon foam with Ni-Nx active sites, which possesses high electrical conductivity, low mass transfer resistance and abundant active sites. Benefiting from these structural advantages, this monolithic electrocatalyst exhibits a large partial current density (71.6 mA cm −2 at -1.4 V versus reversible hydrogen electrode) and a stable Faradaic efficiency of CO (>90 %) at the applied potential range from -1.0 to -1.4 V.