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Metal‐Modulated Nitrogen‐Doped Carbon Electrocatalyst for Efficient Carbon Dioxide Reduction
Author(s) -
Peng Zhen,
Huang Yiyin,
Wang Jian,
Yang Rui,
Xie Jiafang,
Wang Yaobing
Publication year - 2020
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.202000185
Subject(s) - electrocatalyst , faraday efficiency , heteroatom , carbon fibers , electrochemical reduction of carbon dioxide , catalysis , inorganic chemistry , electrochemistry , electrolysis , dopant , materials science , chemical engineering , chemistry , doping , electrode , organic chemistry , carbon monoxide , ring (chemistry) , optoelectronics , composite material , composite number , engineering , electrolyte
Carbon‐based catalysts have been increasingly studied for electrochemical CO 2 reduction, and their design is mainly focused on modulation of heteroatom dopants, of which chemical states rely highly on the synthesis approach and precursor used. In this work, we present a nitrogen‐doped carbon (NC) catalyst with modulation of N assembled states by Fe particles. The synthetic NC@Fe electrocatalyst enabled efficient and durable CO 2 reduction at the maximum CO Faradaic efficiency of 90.6 % and 93 % reservation of its initial activity after long‐term electrolysis. Studies from experiments and DFT calculations indicated that Fe particles induced formation of N‐doped carbon layers in NC@Fe electrocatalyst. These N‐doped carbon layers provide more N‐assembled domains on the surface, in which the triple graphitic N, triple pyridinic N and graphitic‐pyrrolic N configurations were revealed to reduce the formation energy of key intermediates *COOH and *CO for efficient CO 2 ‐to‐CO conversion. These results are hoped to motivate more research on modulation over chemical states of heteroatoms toward synthesis of efficient carbon‐based catalysts for electrocatalytic applications.