| 硼磷共掺杂铁钴双金属材料的制备及其电催化析氧性能 |
| Synthesis of Boron and Phosphorus Co-doped Fe-Co Bimetallic Materialsfor Electrocatalytic Oxygen Evolution Performance |
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| 摘要: 析氧反应(OER)作为电解水的限速步骤,受到缓慢动力学的限制,因此开发一种高效的OER电催化剂具有重要意义。本文采用一步水热法合成硼、磷共掺杂铁钴(Fe-Co-B-P)材料。借助SEM、XRD、XPS、FT-IR等技术对所合成材料的形貌、结构和组成进行表征。利用LSV、CV、EIS等技术研究材料电化学析氧性能。结果表明,Fe-Co-B-P表面疏松且粗糙,颗粒间有许多空隙。在电流密度为10 mA cm-2时,其过电位为254 mV,Tafel斜率为33 mV dec-1,说明该材料具有较优的电催化析氧性能。连续进行10 h的计时电位测试,电位基本保持在1.55 V,表明该催化剂具有较好的电化学稳定性。这是由于铁钴双金属与硼磷非金属之间的协同作用促进了电子的传递。本文所合成的OER电催化剂有望成为贵金属基电催化剂的理想替代品,为开发高效的电解水催化剂提供了设计思路。 |
| 关键词: 析氧反应 电催化 掺杂 铁钴双金属 协同作用 |
| 基金项目: 国家自然科学基金,其它 |
| Abstract: As a rate-limiting step for water electrolysis, oxygen evolution reaction (OER) is limited by slow kinetics, so it is of great significance to develop an efficient OER electrocatalyst. In this paper, boron and phosphorus co-doped Fe-Co (Fe-Co-B-P) materials were synthesized by one-step hydrothermal method. The morphology, structure and composition of the synthesized materials were characterized by SEM, XRD, XPS and FT-IR. The electrochemical oxygen evolution properties of the materials were studied by LSV, CV and EIS techniques. The results show that the surface of Fe-Co-B-P is loose and rough, and there are many voids between the particles. The overpotential of Fe-Co-B-P is 254 mV under the current density of 10 mA cm-2, and the Tafel slope is 33 mV dec-1, indicating that the as-synthesized Fe-Co-B-P material has better electrocatalytic oxygen evolution performance. This is due to the synergistic effect between Fe-Co bimetal and B-P-nonmetal to promote electron transfer. The synthesized OER electrocatalyst is expected to be an ideal substitute for noble metal-based electrocatalyst, which provides a design idea for the development of high-efficiency water electrolysis catalyst. |
| Keywords: oxygen evolution reaction electrocatalysis doping Fe-Co bimetal synergistic effect |
| 投稿时间：2022-08-17 修订日期：2023-03-16 |
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