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基于Fe的等级电催化剂用于网状氧介导的水氧化,具有工业级活动

Rui Yang¹, Hao Fu¹, Zimin Han¹

¹School of Materials and Chemistry, Anhui Agricultural University, Anhui Provincial Engineering Center for High Performance Biobased Nylons, Anhui Provincial Engineering Center for Automotive Highly Functional Fiber Products, Hefei 230036 China.

Journal of colloid and interface science

|February 1, 2025

概括

开发先进的电催化剂是工业性水电解的关键. 这项研究在Ni泡上引入了一种新的Fe2O3/FeMoO4异构催化剂,显示出异常的氧化演化反应活性和耐用性.

科学领域:

材料科学材料科学材料科学
电化学电化学电化学
催化剂是一种催化剂.

背景情况:

工业性水电解需要高效的电催化剂,以在高电流密度下进行氧化演化反应 (OER).
基于过渡金属的催化剂对于提高能源转换效率至关重要.

研究的目的:

为了合理设计和合成一种新的3D层次结构异构结构电催化剂,以提高OER性能.
调查催化机制,并了解为优越的活性和耐用性贡献的因素.

主要方法:

在Ni泡上支持Fe2O3纳米颗粒装饰FeMoO4纳米原料催化剂的制造.
电化学表征包括OER活性,超电位测量和长期耐用性测试.
现场FTIR光谱和理论计算以阐明OER机制.
操作电化学阻抗光谱,以评估电荷传输特性.

主要成果:

Fe2O3 / FeMoO4 / NF电极表现出极好的OER活性,在1000mA cm-2和352mV的2000mA cm-2.2时,超电位为315mV的低超电位.
观察到特殊的长期耐用性,在500 mA cm-2.2下保持超过900小时的性能.
现场FTIR和理论研究证实了网状氧介导机制 (LOM),涉及直接的OO基合,从而加速动力学.
操作EIS表示催化剂结构内的快速电荷传输.

结论:

层次化的Fe2O3/FeMoO4/NF电催化剂表现出工业级OER活动和稳定性.
性能提升归因于丰富的异构接口和LOM主导的机制,该机制克服了扩展限制.
这项工作为开发用于实际性水电解应用的先进电催化剂提供了有前途的战略.

关键词:

层次结构结构的层次结构.较大的电流密度.网格是氧气介导的路径.长期稳定性的长期稳定性氧气的演变氧气的演变

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