无形/晶体Ni-Fe基电极具有丰富的氧气空缺,使海水电解中的高度活跃的氧气演变成为可能
Jingcheng Zhang1, Xinru Ji1, Chenhui Han1
1School of Energy and Power, Jiangsu University of Science and Technology, Zhenjiang 212100, PR China.
Journal of colloid and interface science
|November 3, 2024
概括
研究人员开发了一种新的铁电极,用于在海水电解中进行氧化演化反应 (OER). 这种催化剂表现出高活性和特殊的稳定性,为高效的生产铺平了道路.
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
- 可持续的能源 可持续的能源
背景情况:
- 通过海水电解进行高效的生产需要强大的氧化演化反应 (OER) 催化剂.
- 开发具有成本效益和高活性的电催化剂对于大规模的气生产至关重要.
研究的目的:
- 设计一种基于Ni-Fe的新型无形/晶体电极 (a/c-NiFeOxHy@NF) 用于性介质和海水中的高性能OER.
- 调查工业应用开发的催化剂的结构-活动关系和长期稳定性.
主要方法:
- 使用易于蚀刻的生长策略,在泡 (NF) 上合成a/c-NiFeOxHy@NF电极.
- 进行了电化学表征,以评估OER在性溶液和模拟海水中的活性和稳定性.
- 建造了一台自组装的海水电解器,以证明催化剂在运行条件下的性能.
主要成果:
- 该a/c-NiFeOxHy@NF电极表现出极好的OER活性,在100mA cm-2时达到219mV (性) 和233mV (海水) 的超电位.
- 电极表现出了显著的稳定性,在100 mA cm-2下连续运行超过1200小时,没有明显的退化.
- 使用这种阳极的海水电解仪在1.795V和65°C下实现了500mA cm-2的高电流密度.
结论:
- 设计的无形/晶体Ni-Fe基电极具有丰富的氧空缺,为海水电解中的高效和稳定的OER提供了一个有希望的解决方案.
- 开发的催化剂的卓越性能和耐用性为低成本,高效的生产提供了一个新的范式,显示了工业采用的巨大潜力.
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