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低温熔盐辅助铈掺杂钴基氢氧化物用于工业级电催化析氧反应

王福利 吕千喜 董宜文 谢静宜 王志才 董斌 柴永明

王福利, 吕千喜, 董宜文, 谢静宜, 王志才, 董斌, 柴永明. 低温熔盐辅助铈掺杂钴基氢氧化物用于工业级电催化析氧反应[J]. 燃料化学学报(中英文). doi: 10.1016/S1872-5813(24)60456-1
引用本文: 王福利, 吕千喜, 董宜文, 谢静宜, 王志才, 董斌, 柴永明. 低温熔盐辅助铈掺杂钴基氢氧化物用于工业级电催化析氧反应[J]. 燃料化学学报(中英文). doi: 10.1016/S1872-5813(24)60456-1
WANG Fuli, LV Qianxi, DONG Yiwen, XIE Jingyi, WANG Zhicai, DONG Bin, CHAI Yongming. Ce-doped cobalt-based hydroxide assisted with low-temperature molten salt for industrial oxygen evolution reaction[J]. Journal of Fuel Chemistry and Technology. doi: 10.1016/S1872-5813(24)60456-1
Citation: WANG Fuli, LV Qianxi, DONG Yiwen, XIE Jingyi, WANG Zhicai, DONG Bin, CHAI Yongming. Ce-doped cobalt-based hydroxide assisted with low-temperature molten salt for industrial oxygen evolution reaction[J]. Journal of Fuel Chemistry and Technology. doi: 10.1016/S1872-5813(24)60456-1

低温熔盐辅助铈掺杂钴基氢氧化物用于工业级电催化析氧反应

doi: 10.1016/S1872-5813(24)60456-1
基金项目: 国家自然科学基金面上基金项目 (52174283, 52274308);中国石油大学(华东)研究生创新基金项目和中央高校基本科研业务费专项资金资助(No. 23CX04028A)资助。
详细信息
    通讯作者:

    Tel: +86-532-86981156, Fax: +86-532-86981156, E-mail: dongbin@upc.edu.cn

    ymchai@upc.edu.cn

  • 中图分类号: O643.36

Ce-doped cobalt-based hydroxide assisted with low-temperature molten salt for industrial oxygen evolution reaction

Funds: The project was supported by the National Natural Science Foundation of China (52174283 and 52274308), Innovation Fund Project for Graduate Student of China University of Petroleum (East China) and the Fundamental Research Funds for the Central Universities (No. 23CX04028A).
  • 摘要: 开发低成本、高性能的析氧电催化剂提升电化学水分解的效率,对于氢能的大规模利用具有重要的意义。钴基氢氧化物是一类极具潜力的析氧(OER)电催化剂,但是较差的导电性与催化活性严重制约了其应用推广。本文采用一步低温熔盐法合成了铈掺杂的硝酸氢氧化钴电催化剂(Ce-CoNH/CF)。该催化剂在1 mol/L KOH电解液中具有最低的过电位(448 mV @ 1000 mA/cm2)。塔菲尔(Tafel)斜率,循环伏安(CV)和电化学阻抗谱(EIS)测试表明,快速的反应动力学、高效的电化学活性比表面积(ECSA)和极低的电荷转移电阻(Rct)共同作用使得催化剂具有优异的性能。并且在实验室条件下的模拟工业化测试也表明Ce-CoNH/CF在工业级高温、高浓度的电解液(6 mol/L KOH,70 ℃)中同样展现出了出色的析氧性能。
  • 图  1  所制备催化剂的结构示意图

    Figure  1  Structure diagram of the prepared catalyst

    图  2  (a) Ce-CoNH/CF和CoNH/CF的XRD图;(b) CoNH/CF和(c) Ce-CoNH/CF的SEM图;(d) Ce-CoNH/CF的TEM和HRTEM图;(e) Ce-CoNH/CF的EDS谱图和(f)元素映射图

    Figure  2  (a) XRD patterns of Ce-CoNH/CF and CoNH/CF; SEM images of (b) CoNH/CF and (c) Ce-CoNH/CF; (d) TEM and HRTEM images of Ce-CoNH/CF; EDS diagram (e) and corresponding SEM-Mapping (f) of Ce-CoNH/CF

    图  3  (a) Ce-CoNH/CF和CoNH/CF的XPS全谱图;(b) Ce-CoNH/CF和CoNH/CF的XPS Co 2p谱图;(c) Ce-CoNH/CF和CoNH/CF的XPS O 1s谱图;(d) Ce-CoNH/CF的XPS Ce 3d谱图

    Figure  3  (a) XPS survey spectra of Ce-CoNH/CF and CoNH/CF; (b) XPS spectra of Co 2p for Ce-CoNH/CF and CoNH/CF; (c) XPS spectra of O 1s for Ce-CoNH/CF and CoNH/CF; (d) XPS spectra of Ce 3d for Ce-CoNH/CF

    图  4  在1 mol/L KOH电解液中不同样品的电化学性能: (a) LSV曲线;(b) 过电位柱状图; (c) 双电层电容曲线;(d) Tafel图;(e) EIS谱图;(f) Ce-CoNH/CF的稳定性测试

    Figure  4  Electrocatalytic properties of different samples in 1 mol/L KOH: (a) LSV curves; (b) Histogram for overpotential; (c) Electric double layer capacitance curves; (d) Tafel diagram; (e) EIS spectra; (f) Stability test of Ce-CoNH/CF

    图  5  在6 mol/L 和1 mol/L KOH电解液中Ce-CoNH/CF的电化学性能: (a) LSV曲线;(b) 过电位柱状图; (c) Tafel图;(d) 在不同电流密度下(200,400,600,800,1000 mA/cm2)阶梯型稳定性;(e) 模拟工业级测试条件下的恒电流稳定性测试

    Figure  5  Electrocatalytic properties of different samples in 6 mol/L and 1 mol/L KOH: (a) LSV curves; (b) Histogram for overpotential; (c) Tafel diagram; (d) Multi-step chronopotentiometric curves at different current densities (200,400,600,800,1000 mA/cm2); (e) Stability test of Ce-CoNH/CF under simulating industrial condition

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  • 收稿日期:  2024-01-19
  • 修回日期:  2024-02-23
  • 录用日期:  2024-02-27
  • 网络出版日期:  2024-05-21

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