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Sulfur‐Decorated Ni−N−C Catalyst for Electrocatalytic CO 2 Reduction with Near 100 % CO Selectivity
Author(s) -
Lu Song,
Zhang Yang,
Mady Mohamed F.,
Egwu Eleri Obinna,
Mekonnen Tucho Wakshum,
Mazur Michal,
Li Ang,
Lou Fengliu,
Gu Minfen,
Yu Zhixin
Publication year - 2022
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.202200870
Subject(s) - electrocatalyst , catalysis , faraday efficiency , selectivity , reversible hydrogen electrode , electrochemistry , sulfur , inorganic chemistry , pyrolysis , materials science , chemistry , chemical engineering , electrode , working electrode , metallurgy , organic chemistry , engineering
Abstract Developing highly efficient electrocatalysts for electrochemical CO 2 reduction (ECR) to value‐added products is important for CO 2 conversion and utilization technologies. In this work, a sulfur‐doped Ni−N−C catalyst is fabricated through a facile ion‐adsorption and pyrolysis treatment. The resulting Ni−NS−C catalyst exhibits higher activity in ECR to CO than S‐free Ni−N−C, yielding a current density of 20.5 mA cm −2 under −0.80 V versus a reversible hydrogen electrode (vs. RHE) and a maximum CO faradaic efficiency of nearly 100 %. It also displays excellent stability with negligible activity decay after electrocatalysis for 19 h. A combination of experimental investigations and DFT calculations demonstrates that the high activity and selectivity of ECR to CO is due to a synergistic effect of the S and Ni−N X moieties. This work provides insights for the design and synthesis of nonmetal atom‐decorated M−N−C‐based ECR electrocatalysts.