Ultrafine WC nanoparticles anchored on co-encased, N-doped carbon nanotubes for efficient hydrogen evolution

Ruguang Ma; Erhong Song; Yao Zhou; Zhenzhen Zhou; Guanghui Liu; Qian Liu; Jianjun Liu; Yufang Zhu; Jiacheng Wang

doi:10.1016/j.ensm.2016.10.006

Ultrafine WC nanoparticles anchored on co-encased, N-doped carbon nanotubes for efficient hydrogen evolution

Ruguang Ma
, Erhong Song
, Yao Zhou
, Zhenzhen Zhou
, Guanghui Liu
, Qian Liu^*
, Jianjun Liu
, Yufang Zhu
, Jiacheng Wang

^*此作品的通讯作者

CAS - Shanghai Institute of Ceramics
Shanghai Institute of Materials Genome
University of Shanghai for Science and Technology

科研成果: 期刊稿件 › 文章 › 同行评审

53 引用（Scopus）

摘要

The high-activity electrocatalysts for the hydrogen evolution reaction (HER) are highly desired to replace precious Pt, but difficult to achieve. Herein, we report the loading of ultrafine tungsten carbide (WC) nanoparticles (NPs) on cobalt-embedded, bamboo-like, nitrogen-doped carbon nanotubes (WC/Co@NCNTs) with high-level N doping via a one-step strategy, leading to a desirable multicomponent nanocomposite with superior activity and stability when used as the HER electrocatalyst. The optimized WC/Co@NCNTs showed a very low onset overpotential (U_onset) of ~18 mV, a small Tafel slope of 52 mV dec⁻¹, a small η₁₀ of only 98 mV to reach a current of 10 mA cm⁻², and a large exchange current density (j₀) of 0.103 mA cm⁻², which also retained its high activity for at least 12.5 h operation in acidic electrolyte. The DFT calculations revealed an important role of the N dopants in the HER as well as a favorable ΔG_H* for the adsorption and desorption of hydrogen derived from the synergistic effects between WC NPs and Co@NCNTs.

源语言	英语
页（从-至）	104-111
页数	8
期刊	Energy Storage Materials
卷	6
DOI	https://doi.org/10.1016/j.ensm.2016.10.006
出版状态	已出版 - 1 1月 2017
已对外发布	是

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可持续发展目标 7 经济适用的清洁能源

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@article{2c8c3da097be403394c1ec1e9e4fbd85,

title = "Ultrafine WC nanoparticles anchored on co-encased, N-doped carbon nanotubes for efficient hydrogen evolution",

abstract = "The high-activity electrocatalysts for the hydrogen evolution reaction (HER) are highly desired to replace precious Pt, but difficult to achieve. Herein, we report the loading of ultrafine tungsten carbide (WC) nanoparticles (NPs) on cobalt-embedded, bamboo-like, nitrogen-doped carbon nanotubes (WC/Co@NCNTs) with high-level N doping via a one-step strategy, leading to a desirable multicomponent nanocomposite with superior activity and stability when used as the HER electrocatalyst. The optimized WC/Co@NCNTs showed a very low onset overpotential (Uonset) of \textasciitilde{}18 mV, a small Tafel slope of 52 mV dec−1, a small η10 of only 98 mV to reach a current of 10 mA cm−2, and a large exchange current density (j0) of 0.103 mA cm−2, which also retained its high activity for at least 12.5 h operation in acidic electrolyte. The DFT calculations revealed an important role of the N dopants in the HER as well as a favorable ΔGH* for the adsorption and desorption of hydrogen derived from the synergistic effects between WC NPs and Co@NCNTs.",

keywords = "Carbon nanotubes, Density functional theory, Hydrogen evolution reaction, Synergistic effects, Tungsten carbide",

author = "Ruguang Ma and Erhong Song and Yao Zhou and Zhenzhen Zhou and Guanghui Liu and Qian Liu and Jianjun Liu and Yufang Zhu and Jiacheng Wang",

note = "Publisher Copyright: {\textcopyright} 2016",

year = "2017",

month = jan,

day = "1",

doi = "10.1016/j.ensm.2016.10.006",

language = "English",

volume = "6",

pages = "104--111",

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TY - JOUR

T1 - Ultrafine WC nanoparticles anchored on co-encased, N-doped carbon nanotubes for efficient hydrogen evolution

AU - Ma, Ruguang

AU - Song, Erhong

AU - Zhou, Yao

AU - Zhou, Zhenzhen

AU - Liu, Guanghui

AU - Liu, Qian

AU - Liu, Jianjun

AU - Zhu, Yufang

AU - Wang, Jiacheng

PY - 2017/1/1

Y1 - 2017/1/1

N2 - The high-activity electrocatalysts for the hydrogen evolution reaction (HER) are highly desired to replace precious Pt, but difficult to achieve. Herein, we report the loading of ultrafine tungsten carbide (WC) nanoparticles (NPs) on cobalt-embedded, bamboo-like, nitrogen-doped carbon nanotubes (WC/Co@NCNTs) with high-level N doping via a one-step strategy, leading to a desirable multicomponent nanocomposite with superior activity and stability when used as the HER electrocatalyst. The optimized WC/Co@NCNTs showed a very low onset overpotential (Uonset) of ~18 mV, a small Tafel slope of 52 mV dec−1, a small η10 of only 98 mV to reach a current of 10 mA cm−2, and a large exchange current density (j0) of 0.103 mA cm−2, which also retained its high activity for at least 12.5 h operation in acidic electrolyte. The DFT calculations revealed an important role of the N dopants in the HER as well as a favorable ΔGH* for the adsorption and desorption of hydrogen derived from the synergistic effects between WC NPs and Co@NCNTs.

AB - The high-activity electrocatalysts for the hydrogen evolution reaction (HER) are highly desired to replace precious Pt, but difficult to achieve. Herein, we report the loading of ultrafine tungsten carbide (WC) nanoparticles (NPs) on cobalt-embedded, bamboo-like, nitrogen-doped carbon nanotubes (WC/Co@NCNTs) with high-level N doping via a one-step strategy, leading to a desirable multicomponent nanocomposite with superior activity and stability when used as the HER electrocatalyst. The optimized WC/Co@NCNTs showed a very low onset overpotential (Uonset) of ~18 mV, a small Tafel slope of 52 mV dec−1, a small η10 of only 98 mV to reach a current of 10 mA cm−2, and a large exchange current density (j0) of 0.103 mA cm−2, which also retained its high activity for at least 12.5 h operation in acidic electrolyte. The DFT calculations revealed an important role of the N dopants in the HER as well as a favorable ΔGH* for the adsorption and desorption of hydrogen derived from the synergistic effects between WC NPs and Co@NCNTs.

KW - Carbon nanotubes

KW - Density functional theory

KW - Hydrogen evolution reaction

KW - Synergistic effects

KW - Tungsten carbide

UR - https://www.scopus.com/pages/publications/84994259895

U2 - 10.1016/j.ensm.2016.10.006

DO - 10.1016/j.ensm.2016.10.006

M3 - Article

AN - SCOPUS:84994259895

SN - 2405-8297

VL - 6

SP - 104

EP - 111

JO - Energy Storage Materials

JF - Energy Storage Materials

ER -

Ultrafine WC nanoparticles anchored on co-encased, N-doped carbon nanotubes for efficient hydrogen evolution

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