不钢激活用于高效的性氧的进化在先进的电解器
Yong Zuo1, Valentina Mastronardi2, Agnese Gamberini2
1Nanochemistry Department, Istituto Italiano di Tecnologia, Via Morego 30, Genova, 16163, Italy.
Advanced materials (Deerfield Beach, Fla.)
|February 20, 2024
概括
这项研究通过电化学激活增强了不钢电极,以实现高效的氧演化反应 (OER). 这种方法显著降低了过量的电位,并改善了水电解应用的长期稳定性.
科学领域:
- 电化学 电化学 电化学
- 材料科学 材料科学 材料科学
- 催化剂是一种催化剂.
背景情况:
- 为氧化演化反应 (OER) 开发具有成本效益的电催化剂对于水电解至关重要.
- 不钢 (SS) 是一种潜在的低成本材料,但其内在的OER活动需要增强.
研究的目的:
- 开发一种电化学策略,以激活不钢电极,以获得高效和稳定的性OER.
- 调查激活机制和浸出物种在提高OER性能中的作用.
主要方法:
- 在特定的潜在窗口内进行电化学循环,以激活SS电极.
- 电化学表征,感应合等离子体 - 光学发射光谱学 (ICP-OES) 和操作拉曼光谱学.
- 对OER活动再生和稳定性测试的潜在脉冲策略.
主要成果:
- 电化学激活显著降低了OER超电位的40mV在100mA cm-2.2.显著降低了OER超电位.
- 铁的漏加速,暴露了Cr和Ni物种,Ni积累为OER活性Fe-纳入的NiOOH.
- 激活的SS电极表现出了显著的稳定性,在300小时后没有表现衰退,并且在性水电解仪中具有竞争性表现.
结论:
- 电化学激活是一种有效的策略,可以提高不钢的OER性能.
- 该机制涉及受控的浸出和表面重建,导致活性Ni基物种的形成.
- 激活不钢显示出作为性水电解中的贵金属催化剂的耐用和经济有效的替代品的希望.
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