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S‐Doped Carbon Nanospheres: An Efficient Electrocatalyst toward Artificial N 2 Fixation to NH 3
Author(s) -
Xia Li,
Wu Xiufeng,
Wang Yuan,
Niu Zhiguo,
Liu Qian,
Li Tingshuai,
Shi Xifeng,
Asiri Abdullah M.,
Sun Xuping
Publication year - 2019
Publication title -
small methods
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 4.66
H-Index - 46
ISSN - 2366-9608
DOI - 10.1002/smtd.201800251
Subject(s) - electrocatalyst , electrochemistry , catalysis , selectivity , carbon fibers , reversible hydrogen electrode , carbon fixation , materials science , nitrogen , chemistry , electrode , inorganic chemistry , carbon dioxide , organic chemistry , working electrode , composite material , composite number
Industrial NH 3 synthesis mainly relies on the carbon‐emitting Haber–Bosch process operating under severe conditions. Electrocatalytic N 2 to NH 3 fixation at ambient conditions is an attractive approach to reduce energy consumption and avoid direct carbon emission. In this communication, it is reported that the S‐doped carbon nanosphere (S‐CNS) acts as an efficient and stable nitrogen reduction reaction (NRR) catalyst for ambient N 2 to NH 3 conversion with excellent selectivity. In 0.1 m Na 2 SO 4 , the S‐CNS achieves a large NH 3 yield of 19.07 μg h −1 mg −1 cat. and a high Faradic efficiency of 7.47% at –0.7 V versus reversible hydrogen electrode, much higher than those of undoped CNS (3.70 μg h −1 mg −1 cat. , 1.45%). Notably, this catalyst also demonstrates high electrochemical and structure stability.