无机材料学报 ›› 2024, Vol. 39 ›› Issue (11): 1265-1274.DOI: 10.15541/jim20240074 CSTR: 32189.14.10.15541/jim20240074

所属专题: 【能源环境】氢能材料(202409)

• 研究论文 • 上一篇    下一篇

高熵磷化物双功能催化剂的制备及高效电解水性能

张文宇1,2,3(), 郭瑞华1,2,3(), 岳全鑫1,2,3, 黄雅荣1, 张国芳1, 关丽丽1,2   

  1. 1.材料科学与工程学院 内蒙古科技大学, 包头 014010
    2.内蒙古自治区先进陶瓷材料与器件重点实验室 内蒙古科技大学, 包头 014010
    3.轻稀土资源绿色提取与高效利用教育部重点实验室 内蒙古科技大学, 包头 014010
  • 收稿日期:2024-02-21 修回日期:2024-05-23 出版日期:2024-11-20 网络出版日期:2024-06-24
  • 通讯作者: 郭瑞华, 教授. E-mail: grh7810@163.com
  • 作者简介:张文宇(1997-), 男, 硕士研究生. E-mail: zhangwenyu529@qq.com
  • 基金资助:
    国家自然科学基金(51864040);国家自然科学基金(51962028);国家自然科学基金(52162010);内蒙古自治区科技计划(2021GG0042);内蒙古自治区高等学校青年科技英才(NJYT22064);内蒙古自治区自然科学基金(2022MS05018);内蒙古自治区自然科学基金(2022LHMS05021)

High-entropy Phosphide Bifunctional Catalyst: Preparation and Performance of Efficient Water Splitting

ZHANG Wenyu1,2,3(), GUO Ruihua1,2,3(), YUE Quanxin1,2,3, HUANG Yarong1, ZHANG Guofang1, GUAN Lili1,2   

  1. 1. School of Materials Science and Engineering, Inner Mongolia University of Science & Technology, Baotou 014010, China
    2. Inner Mongolia Key Laboratory of Advanced Ceramic Materials and Devices, Inner Mongolia University of Science & Technology, Baotou 014010, China
    3. Key Laboratory of Green Extraction & Efficient Utilization of Light Rare-Earth Resources, Ministry of Education, Inner Mongolia University of Science & Technology, Baotou 014010, China
  • Received:2024-02-21 Revised:2024-05-23 Published:2024-11-20 Online:2024-06-24
  • Contact: GUO Ruihua, professor. E-mail: grh7810@163.com
  • About author:ZHANG Wenyu (1997-), male, Master candidate. E-mail: zhangwenyu529@qq.com
  • Supported by:
    National Natural Science Foundation of China(51864040);National Natural Science Foundation of China(51962028);National Natural Science Foundation of China(52162010);Inner Mongolia Autonomous Region Science and Technology Program(2021GG0042);Inner Mongolia Autonomous Region Youth Science and Technology Excellence in Higher Education(NJYT22064);Inner Mongolia Autonomous Region Natural Science Foundation Program(2022MS05018);Inner Mongolia Autonomous Region Natural Science Foundation Program(2022LHMS05021)

摘要:

在电解水制氢过程中, 析氢反应(HER)和析氧反应(OER)的缓慢电催化动力学限制了其能量转换效率。高熵材料具有独特的结构特征和优异的性能, 是一种潜在的电解水催化剂, 有可能取代传统的金属氧化物和贵金属。由于金属与非金属之间的不相容性, 关于高熵化合物特别是高熵金属磷化物合成的报道很少。本研究以柠檬酸为络合剂、磷酸二氢铵为磷源, 采用低温溶胶-凝胶法, 通过添加不同组元金属合成了一系列以碳为基底的高熵合金磷化物纳米颗粒。在1 mol·L-1的KOH介质中, FeCoNiMoCeP/C表现出良好的电解水性能, 在电流密度为10 mA·cm-2条件下, FeCoNiMoCeP/C电极电催化HER和OER所需的过电位分别为119和240 mV。在全解水研究中, FeCoNiMoCeP/C表现出优异的催化活性。在电流密度为10 mA·cm-2条件下, FeCoNiMoCeP/C同时用作阴极和阳极的电解水反应所需过电位仅为1.53 V。这是由于高熵磷化物催化剂原子之间的协同作用可以提供更多的反应位点, 增加反应活性和选择性。本研究可拓展高熵合金在电催化领域的潜在应用范围。

关键词: 高熵金属磷化物, 双功能催化剂, 全解水, 协同效应

Abstract:

In the process of electrolyzing water to produce hydrogen, the sluggish electrocatalytic kinetics of the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) limit the energy conversion efficiency. High-entropy materials have been considered as potential catalysts due to their unique structural features and excellent performance, which could potentially replace traditional metal oxides and precious metals for energy conversion and water electrolysis. Due to the incompatibility between different metals and non-metals, there have been few reports on the synthesis of high-entropy compounds, especially high-entropy metal phosphides. In this study, a series of carbon-based high-entropy alloy phosphide nanoparticles were synthesized using citric acid as complexing agent and ammonium dihydrogen phosphate as phosphorus source via a low-temperature Sol-Gel method with different elemental metals. In 1 mol·L-1 KOH solution, FeCoNiMoCeP/C exhibited good water electrolysis performance at a current density of 10 mA·cm-2, with overpotentials of 119 and 240 mV for the HER and OER, respectively. Similarly, in overall water splitting studies, FeCoNiMoCeP/C also showed excellent catalytic activity. When operating at a current density of 10 mA·cm-2, FeCoNiMoCeP/C required only 1.53 V as the combined anode and cathode voltage for electrolyzing water. This is due to the synergistic effects among the atoms of high-entropy phosphide catalysts which provide more reaction sites to increase reaction activity and selectivity. This study is expected to expand the potential applications of high-entropy alloys in the field of electrocatalysis.

Key words: high-entropy metal phosphide, bifunctional catalyst, overall water splitting, synergistic effect

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