碳负载氮掺杂纳米碳化钨电催化剂的制备及析氢性能

doi:10.11896/cldb.20060079

材料导报

2021, Vol. 35

Issue (14): 14007-14011 https://doi.org/10.11896/cldb.20060079

无机非金属及其复合材料

碳负载氮掺杂纳米碳化钨电催化剂的制备及析氢性能

闫朋朋¹, 苏伟², 韦小凤^1,*, 朱学卫¹, 王府¹

1 西北农林科技大学机械与电子工程学院,杨陵712100
2 遵义师范学院物理与电子科学学院,遵义 563000

Preparation and Hydrogen Evolution Performance of Carbon-supported Nitrogen-doped Nano Tungsten Carbide Electrocatalyst

YAN Pengpeng¹, SU Wei², WEI Xiaofeng^1,*, ZHU Xuewei¹, WANG Fu¹

1 School of Mechanical and Electrical Engineering,Northwest A&F University,Yangling 712100,China
2 School of Physics and Electronic Sciences,Zunyi Normal University,Zunyi 563000,China

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摘要碳化钨(WC)是高成本和资源稀缺铂基催化剂的优良替代品。以偏钨酸铵(AMT)、葡萄糖(C₆H₁₂O₆)和二氰二胺(DCDA)为W、C和N源,采用简易的NaCl/KCl熔融盐一步碳化法制备碳负载氮(N)掺杂WC@NC纳米晶粒。利用XRD、SEM、TEM、XPS、电化学工作站对催化剂的物相、形貌及电催化析氢性能进行表征。结果表明,WC@NC由碳片和WC组成,颗粒分布均匀,纳米颗粒平均直径为10~30 nm。WC@NC在0.5 mol/L H₂SO₄电解液中电流密度为10 mA/ cm²的过电位是132 mV,塔菲尔斜率为64.2 mV/dec。经过5 000次循环伏安测试和25 h持续电解析氢测试后,线性扫描伏安(LSV)曲线和电流密度均无明显变化,表现出非常高的稳定性。

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	闫朋朋
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	王府

关键词: 熔融盐氮掺杂碳化钨电解水析氢反应(HER)

Abstract: Tungsten carbide(WC) is an alternative to the costly and resource-constrained Pt-based catalysts.Herein, ammonium metatungstate (AMT), glucose (C₆H₁₂O₆) and dicyandiamide (DCDA) were used as W, C and N sources.A one-step facile and easily scalable approach is reported to synthesize ultrafine WC nanocrystals supported on N-doped carbon nanosheets (NC) by molten salt. The morphology,composition and phases were characterized by SEM,TEM, XRD and XPS. Moreover, the HER performance of the catalysts in 0.5 mol/L H₂SO₄ was determined.The results showed that WC@NC is composed of carbon sheet and WC with uniform particle distribution. The average diameter of nanoparticles is 10—30 nm.As a result, WC@NC demonstrates remarkable hydrogen evolution reaction (HER) electrocatalytic performance with overpotentials of 132 mV at a current density of 10 mA/cm² and Tafel slope of 64.2 mV/dec in acid media, respectively. Moreover, catalysts exhibited remarkable stability during 5 000 times cycles cyclic voltammetry(CV) sweeps and 25 h testing at the fixed overpotential.

Key words: molten salt N-doped tungsten carbide electrolysis of water hydrogen evolution reaction(HER)

出版日期: 2021-07-25 发布日期: 2021-08-03

ZTFLH:

TQ116

基金资助: 陕西省自然科学基础研究计划(2019JQ-584);国家自然科学基金(51764017)

通讯作者: * wxf8412@163.com

作者简介: 闫朋朋,西北农林科技大学机械与电子工程学院在读,主要从事纳米材料研究。
韦小凤,西北农林科技大学机械与电子工程学院讲师,主要从事纳米材料研究。

引用本文:

闫朋朋, 苏伟, 韦小凤, 朱学卫, 王府. 碳负载氮掺杂纳米碳化钨电催化剂的制备及析氢性能[J]. 材料导报, 2021, 35(14): 14007-14011.
YAN Pengpeng, SU Wei, WEI Xiaofeng, ZHU Xuewei, WANG Fu. Preparation and Hydrogen Evolution Performance of Carbon-supported Nitrogen-doped Nano Tungsten Carbide Electrocatalyst. Materials Reports, 2021, 35(14): 14007-14011.

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http://www.mater-rep.com/CN/10.11896/cldb.20060079 或 http://www.mater-rep.com/CN/Y2021/V35/I14/14007

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