Open AccessCNT modified by mesoporous carbon anchored by Ni nanoparticles for CO 2 electrochemical reduction
Author(s) -
Du Juan,
Chen Aibing,
Hou Senlin,
Guan Jing
Publication year - 2022
Publication title -
carbon energy
Language(s) - English
Resource type - Journals
ISSN - 2637-9368
DOI - 10.1002/cey2.223
Subject(s) - overpotential , electrocatalyst , materials science , mesoporous material , ammonium bromide , nanoparticle , chemical engineering , catalysis , inorganic chemistry , electrochemical reduction of carbon dioxide , carbon fibers , carbon nanotube , pyrolysis , electrolyte , electrochemistry , faraday efficiency , carbon monoxide , nanotechnology , electrode , chemistry , pulmonary surfactant , organic chemistry , composite number , composite material , engineering
The design of novel catalysts for efficient electroreduction of CO 2 into value‐added chemicals is a promising approach to alleviate the energy crisis. Herein, we successfully modify the carbon nanotube by a layer of mesoporous carbon shell anchored by nickel (Ni) nanoparticles. Ni species effectively enable carbon deposition derived from pyrolysis of surfactant 1‐hexadecyl trimethyl ammonium bromide to form a mesoporous carbon shell. At the same time, Ni nanoparticles can be embedded in the mesoporous carbon shell due to the confinement effect. Owing to the dispersive Ni nanoparticles and N‐doping active sites of mesoporous carbon, the as‐prepared electrocatalyst exhibits exciting catalytic performance for the selective reduction of CO 2 to carbon monoxide (CO) with a maximum Faradaic efficiency of 98% at a moderate overpotential of −0.81 V (vs. reversible hydrogen electrode) and a high partial current density of 60 mA cm −2 in H‐cell with an aqueous electrolyte.