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N‐Doped Carbon Nanotubes Encapsulating Ni/MoN Heterostructures Grown on Carbon Cloth for Overall Water Splitting
Author(s) -
Wang Pan,
Qi Ji,
Li Chuang,
Chen Xiao,
Wang Tonghua,
Liang Changhai
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.202000023
Subject(s) - overpotential , carbon nanotube , water splitting , materials science , electrocatalyst , bifunctional , heterojunction , chemical engineering , nanotechnology , carbon fibers , catalysis , electrochemistry , composite number , chemistry , composite material , optoelectronics , electrode , photocatalysis , organic chemistry , engineering
Herein, we reported a new strategy to grow N‐doped carbon nanotubes encapsulating Ni/MoN heterostructures on carbon cloth (Ni/MoN@NCNT/CC). The high intrinsic activity in the interface engineering of the Ni/MoN heterostructures, the high conductivity and protection of NCNT, and the three‐dimensional structure of the Ni/MoN@NCNT/CC contribute to its outstanding activity and stability for HER (overpotential of 207 mV at 10 mA cm −2 ) and OER (overpotential of 252 mV at 10 mA cm −2 ). Particularly, for HER, it can maintain a consistent potential at 100 mA cm −2 for 100 h. Besides, for OER the generated surface roughness and larger surface area can enhance OER activity of the catalyst. When used as a bifunctional electrocatalyst for overall water splitting, it can achieve a current density of 10 mA cm −2 at a cell voltage of 1.699 V with excellent durability. This work provides a new strategy to fabricate three‐dimensional heterostructured water‐splitting electrocatalysts with large surface area.