阴离子调节的Ni/Ni3N化合物异质连接作为水分的高效双功能电催化剂
Weigao Zhong1, Qiming Sun1, Lin Lv2
1Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, Yunnan, PR China.
ACS applied materials & interfaces
|December 28, 2024
概括
研究人员开发了一种新的非贵金属双功能电催化剂,用于整体水分. Ni/Ni3N@NiFe(OH) x核心外催化剂表现出色的性能,降低了水分裂所需的电压.
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
- 纳米技术纳米技术
背景情况:
- 开发高效的非贵金属双功能电催化剂对于大规模的整体水分裂至关重要.
- 现有的催化剂在性能,耐用性和成本效益方面经常面临挑战.
研究的目的:
- 设计和合成一个高性能,耐用,非贵金属双功能电催化剂,用于整体的水分离.
- 研究新型催化剂的结构-活性关系和催化机制.
主要方法:
- 使用简单的合方法制造一个核心纳米结构催化剂 (Ni/Ni3N核心和NiFe(OH) x).
- 电化学表征,包括对演化反应 (HER) 和氧演化反应 (OER) 的超电位测量.
- 在现场拉曼光谱学以阐明催化机制和表面重建.
主要成果:
- Ni/Ni3N@NiFe(OH) x-4催化剂在10 mA cm-2的1.0 M KOH中显示出57 mV (HER) 和243 mV (OER) 的低超电位.
- 与未经修改的Ni/Ni3N相比,HER和OER在质量和内在活动方面取得了显著的改进.
- 双功能催化剂在1.58V的降低电压下在10mA cm-2.2下运行了整体水分裂.
- 发现表面重建和Fe蚀刻促进了活性NiOOH相的形成并加速了动力学.
结论:
- 开发的Ni/Ni3N@NiFe(OH) x核心外催化剂是一个非常有前途的非贵金属双功能电催化剂,用于整体的水分裂.
- 简单的合成和表面重建策略有效地提高了催化活性和耐用性.
- 这项工作为设计用于清洁能源应用的先进电催化剂提供了宝贵的见解.
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