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Title: Nitrogen-doped tungsten carbide nanoarray as an efficient bifunctional electrocatalyst for water splitting in acid

Abstract

Tungsten carbide is one of the most promising electrocatalysts for the hydrogen evolution reaction, although it exhibits sluggish kinetics due to a strong tungsten-hydrogen bond. In addition, tungsten carbide’s catalytic activity toward the oxygen evolution reaction has yet to be reported. Here, we introduce a superaerophobic nitrogen-doped tungsten carbide nanoarray electrode exhibiting high stability and activity toward hydrogen evolution reaction as well as driving oxygen evolution efficiently in acid. Nitrogen-doping and nanoarray structure accelerate hydrogen gas release from the electrode, realizing a current density of -200 mA cm -2 at the potential of -190 mV vs. reversible hydrogen electrode, which manifest one of the best non-noble metal catalysts for hydrogen evolution reaction. Under acidic conditions (0.5 M sulfuric acid), water splitting catalyzed by nitrogen-doped tungsten carbide nanoarray starts from about 1.4 V, and outperforms most other water splitting catalysts.

Authors:
 [1];  [2];  [1];  [1];  [1];  [1];  [1];  [1];  [2]; ORCiD logo [3];  [1]
  1. Beijing Univ. of Chemical Technology (China). State Key Lab. of Chemical Resource Engineering
  2. Yale Univ., New Haven, CT (United States). Dept. of Chemistry and Energy Sciences Inst.
  3. Beijing Univ. of Chemical Technology (China). State Key Lab. of Chemical Resource Engineering; Yale Univ., New Haven, CT (United States). Dept. of Chemistry and Energy Sciences Inst.
Publication Date:
Research Org.:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1490192
Grant/Contract Number:  
SC0001059
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Nature Communications
Additional Journal Information:
Journal Volume: 9; Journal Issue: 1; Journal ID: ISSN 2041-1723
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats

Han, Nana, Yang, Ke R., Lu, Zhiyi, Li, Yingjie, Xu, Wenwen, Gao, Tengfei, Cai, Zhao, Zhang, Ying, Batista, Victor S., Liu, Wen, and Sun, Xiaoming. Nitrogen-doped tungsten carbide nanoarray as an efficient bifunctional electrocatalyst for water splitting in acid. United States: N. p., 2018. Web. doi:10.1038/s41467-018-03429-z.
Han, Nana, Yang, Ke R., Lu, Zhiyi, Li, Yingjie, Xu, Wenwen, Gao, Tengfei, Cai, Zhao, Zhang, Ying, Batista, Victor S., Liu, Wen, & Sun, Xiaoming. Nitrogen-doped tungsten carbide nanoarray as an efficient bifunctional electrocatalyst for water splitting in acid. United States. doi:10.1038/s41467-018-03429-z.
Han, Nana, Yang, Ke R., Lu, Zhiyi, Li, Yingjie, Xu, Wenwen, Gao, Tengfei, Cai, Zhao, Zhang, Ying, Batista, Victor S., Liu, Wen, and Sun, Xiaoming. Fri . "Nitrogen-doped tungsten carbide nanoarray as an efficient bifunctional electrocatalyst for water splitting in acid". United States. doi:10.1038/s41467-018-03429-z. https://www.osti.gov/servlets/purl/1490192.
@article{osti_1490192,
title = {Nitrogen-doped tungsten carbide nanoarray as an efficient bifunctional electrocatalyst for water splitting in acid},
author = {Han, Nana and Yang, Ke R. and Lu, Zhiyi and Li, Yingjie and Xu, Wenwen and Gao, Tengfei and Cai, Zhao and Zhang, Ying and Batista, Victor S. and Liu, Wen and Sun, Xiaoming},
abstractNote = {Tungsten carbide is one of the most promising electrocatalysts for the hydrogen evolution reaction, although it exhibits sluggish kinetics due to a strong tungsten-hydrogen bond. In addition, tungsten carbide’s catalytic activity toward the oxygen evolution reaction has yet to be reported. Here, we introduce a superaerophobic nitrogen-doped tungsten carbide nanoarray electrode exhibiting high stability and activity toward hydrogen evolution reaction as well as driving oxygen evolution efficiently in acid. Nitrogen-doping and nanoarray structure accelerate hydrogen gas release from the electrode, realizing a current density of -200 mA cm-2 at the potential of -190 mV vs. reversible hydrogen electrode, which manifest one of the best non-noble metal catalysts for hydrogen evolution reaction. Under acidic conditions (0.5 M sulfuric acid), water splitting catalyzed by nitrogen-doped tungsten carbide nanoarray starts from about 1.4 V, and outperforms most other water splitting catalysts.},
doi = {10.1038/s41467-018-03429-z},
journal = {Nature Communications},
number = 1,
volume = 9,
place = {United States},
year = {Fri Mar 02 00:00:00 EST 2018},
month = {Fri Mar 02 00:00:00 EST 2018}
}

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