从金属化物中获得的-铁氧化:在高电流密度下为氧气演化反应提供高效的电催化剂
María Isabel Díez-García1, Guillem Montaña-Mora1, Marc Botifoll2
1Catalonia Institute for Energy Research (IREC), Jardins de les Dones de Negre 1, Sant Adrià del Besòs, 08930 Barcelona, Spain.
ACS applied energy materials
|June 16, 2023
概括
来自铁化物纳米棒的新型铁氧化电催化剂使电化学细胞能够高效地氧化水. 这种双金属阳极在高电流密度下表现出高稳定性和高效率.
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:
- 实际的电化学电池需要高电流密度的阳极来进行氧气演化反应 (OER).
- 开发高效和稳定的电催化剂对于推进水氧化技术至关重要.
研究的目的:
- 为高性能氧气演化反应 (OER) 开发一种新的双金属电催化剂.
- 为了研究铁化物纳米棒的转化为铁氧化催化剂.
- 在高电流密度的离子交换膜电解装置中评估催化剂的性能.
主要方法:
- 在泡上合成无粘合剂的铁化物 (CoFeP) 纳米棒,使用三酸.
- 在性介质中转化过程中对CoFeP纳米棒进行形态和化学分析.
- 电化学表征包括Tafel斜率和OER的超电位测量.
- 在 1 A cm−2.2.2 的离子交换膜电解装置中测试基于 CoFeP 的集成阳极.
主要成果:
- CoFeP纳米棒转化为具有增强OER活性的双金属氧化.
- 由此产生的电极表现出42mV dec-1的低Tafel斜率和低的超电位.
- 集成的阳极表现出极好的稳定性和近100%的法拉代效率在高电流密度1A cm-2.2的高电流密度.
结论:
- 无粘合剂的基于CoFeP的阳极在性介质中的氧化演化反应 (OER) 中非常有效.
- 这种双金属氧化催化剂对实际的燃料电合成装置有很大的前景.
- 该研究强调了一种可扩展的方法,用于生产用于能源应用的先进电催化剂.
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