2中對金屬氧化物和石墨進(jìn)行電脫氧，制備了具有面心立方結(jié)構(gòu)的納米級(VNbTaZrHf)C高熵碳化物（HEC）粉末。適當(dāng)?shù)臏囟葪l件有利于抑制HEC顆粒的原位燒結(jié)生長。在1 mol/L KOH溶液中進(jìn)行了電化學(xué)性能測試，探索(VNbTaZrHf)C HEC的催化性能。通過極化曲線、Tafel斜率、電化學(xué)阻抗譜和雙層電容值CV測試評估了(VNbTaZrHf)C HEC的催化析氫反應(yīng)（HER）性能。結(jié)果表明，(VNbTaZrHf)C HEC的雙層電容值為40.6 mF/cm2。雙層電容值越大，表明電化學(xué)活性表面積越大。由于(VNbTaZrHf)C HEC的高熵效應(yīng)和納米級結(jié)構(gòu)，它表現(xiàn)出優(yōu)異的催化HER性能，并為通過熔鹽電脫氧制備HECs提供了新方法。"/>

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熔鹽電脫氧工藝制備納米級(VNbTaZrHf)C高熵碳化物及其析氫反應(yīng)的催化性能
作者:
作者單位:

1.華北理工大學(xué) 綜合測試分析中心，河北 唐山 063009;2.華北理工大學(xué) 冶金與能源學(xué)院，河北 唐山 063210;3.重慶大學(xué) 材料科學(xué)與工程學(xué)院，重慶 400044;4.重慶工業(yè)職業(yè)技術(shù)學(xué)院 機(jī)械工程學(xué)院 材料成型及模具技術(shù)重點實驗室，重慶 401120

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基金項目:

重慶市自然科學(xué)基金；唐山市科技創(chuàng)新團(tuán)隊培養(yǎng)計劃項目


Preparation of Nanoscale (VNbTaZrHf)C High-Entropy Carbides via Molten Salt Electro-deoxidation and Its Catalytic Performance of Hydrogen Evolution Reaction
Author:
Affiliation:

1.Comprehensive Testing and Analyzing Center, North China University of Science and Technology, Tangshan 063009, China;2.College of Metallurgy and Energy, North China University of Science and Technology, Tangshan 063210, China;3.College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China;4.Key Laboratory of Material Processing and Mold Technology, School of Mechanical Engineering, Chongqing Industry Polytechnic College, Chongqing 401120, China

Fund Project:

Chongqing Natural Science Foundation (cstc2021jcyj-msxmX1049); Tangshan Science and Technology Innovation Team Training Plan Project (21130207D)

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    摘要:

    通過在1173 K的CaCl2中對金屬氧化物和石墨進(jìn)行電脫氧，制備了具有面心立方結(jié)構(gòu)的納米級(VNbTaZrHf)C高熵碳化物（HEC）粉末。適當(dāng)?shù)臏囟葪l件有利于抑制HEC顆粒的原位燒結(jié)生長。在1 mol/L KOH溶液中進(jìn)行了電化學(xué)性能測試，探索(VNbTaZrHf)C HEC的催化性能。通過極化曲線、Tafel斜率、電化學(xué)阻抗譜和雙層電容值CV測試評估了(VNbTaZrHf)C HEC的催化析氫反應(yīng)（HER）性能。結(jié)果表明，(VNbTaZrHf)C HEC的雙層電容值為40.6 mF/cm2。雙層電容值越大，表明電化學(xué)活性表面積越大。由于(VNbTaZrHf)C HEC的高熵效應(yīng)和納米級結(jié)構(gòu)，它表現(xiàn)出優(yōu)異的催化HER性能，并為通過熔鹽電脫氧制備HECs提供了新方法。

    Abstract:

    The nanoscale (VNbTaZrHf)C high-entropy carbide (HEC) powders with face-centered cubic structure were prepared by electro-deoxidation of metal oxides and graphite in CaCl2 at 1173 K. Appropriate temperature conditions are favorable for suppressing the in-situ sintering growth of HEC particles. Electrochemical performance tests were conducted in 1 mol/L KOH solution to investigate the catalytic performance of (VNbTaZrHf)C HEC. The catalytic performance of (VNbTaZrHf)C HEC for hydrogen evolution reaction (HER) was evaluated through polarization curves, Tafel slope, electrochemical impedance spectroscopy, and double-layer capacitance value cyclic voltammetry tests. Results show that the double-layer capacitance value of (VZrHfNbTa)C HEC is 40.6 mF/cm2. The larger the double-layer capacitance value, the larger the electrochemically active surface area. Due to the high-entropy effect and nanoscale structure of (VNbTaZrHf)C HEC, it exhibits superior catalytic performance to HER. This research provides a novel method for the preparation of HECs via molten salt electro-deoxidation.

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楊宇,陳庚,李慧,梁精龍,扈玫瓏,胡蒙均.熔鹽電脫氧工藝制備納米級(VNbTaZrHf)C高熵碳化物及其析氫反應(yīng)的催化性能[J].稀有金屬材料與工程,2024,53(6):1566~1573.[Yang Yu, Chen Geng, Li Hui, Liang Jinglong, Hu Meilong, Hu Mengjun. Preparation of Nanoscale (VNbTaZrHf)C High-Entropy Carbides via Molten Salt Electro-deoxidation and Its Catalytic Performance of Hydrogen Evolution Reaction[J]. Rare Metal Materials and Engineering,2024,53(6):1566~1573.]
DOI：10.12442/j. issn.1002-185X.20230580

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  • 收稿日期:2023-09-14
  • 最后修改日期:2023-11-07
  • 錄用日期:2023-11-13
  • 在線發(fā)布日期: 2024-06-20
  • 出版日期: 2024-06-17