单原子调制氧化用于促进整体水分的分裂
Rui Wan1,2, Yuguang Wang1,2, Xiaoxiao Wu1,2
1Key Laboratory of Materials Physics and Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei 230031, China.
ACS nano
|October 27, 2025
概括
这项研究引入了一种新的双功能电催化剂,该电催化剂由单个原子在氧化纳米片上制成. 这种催化剂在水电解中的和氧进化反应中显示出高效率和稳定性.
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:
- 开发高效的双功能电催化剂用于演化反应 (HER) 和氧演化反应 (OER) 是工业水电解的关键.
- 现有的催化剂在高电流密度下往往难以保持活性和稳定.
研究的目的:
- 创建一个简单的单阶段热水制造方法来制造一种新的双功能电催化剂.
- 研究用于水电解的单一原子调制氧化纳米片的结构和电子特性.
主要方法:
- 采用一阶段的热水合成策略,在泡 (Ir-Ni(OH) 2/NF) 上制备Ir单原子 (SA) 调制的超薄氧化纳米片.
- 密度函数理论 (DFT) 的计算被用来理解催化机制和电子结构.
- 在性介质中评估了HER和OER的电化学性能.
- 使用开发的电极组装了一个离子交换膜水电解 (AEMWE) 电池.
主要成果:
- 在Ir-Ni(OH) 2/NF电极表现出HER的23mV和OER的217mV的低超电位在10mA cm-2时.
- 加入Ir原子调节了Ni (OH) 2的电子特性,创造了氧气空缺并优化了活性位点.
- 使用Ir-Ni(OH) 2/NF的AEMWE电解器在500mA cm-2时实现了1.54V的超小电池电压,稳定时间超过225小时.
结论:
- - (OH) 2/NF电极表现出优异的双功能活性和水电解的稳定性.
- 这项研究为通过单原子调制设计先进的双功能电催化剂提供了有希望的途径.
- 这项工作有助于推进高效和持久的水分技术.
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