在岩类型NiWO4上进行低Pt负荷,以优化电催化水分裂和氨氧化反应
Hirak Kumar Basak1, Mrinal Kanti Adak1, Anubha Rajput1
1Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India.
ACS applied materials & interfaces
|January 28, 2025
概括
这项研究开发了一种新的配NiWO4催化剂,通过水或氨电解有效生产. 催化剂显示了增强的电催化活性和稳定性,使电解剂的实际应用成为可能.
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:
- 具有成本效益的气生产对于可持续能源至关重要.
- 基于过渡金属的电极对水分裂和氨电解有很大的希望.
- 提高这些电极的电催化效率是一个关键的挑战.
研究的目的:
- 提高NiWO4用于生产的电催化效率.
- 为了研究兴奋剂对NiWO4的催化性能的影响.
- 开发一种用于水和氨电解的多式电催化剂.
主要方法:
- 合成配的NiWO4 (Pt/NiWO4) 具有不同的Pt度 (1-4%).
- 使用粉末X射线衍射,ICP-MS和XPS进行表征.
- 使用旋转环盘电极 (RRDE) 等技术,对氧演变反应 (OER),演变反应 (HER) 和氨氧化反应 (AOR) 的电化学评估.
主要成果:
- 富含3~4%Pt的NiWO4显著改善了OER和HER活动,超电位下降了50mV.
- 3%Pt/NiWO4电极在OER和HER中表现为110小时的稳定性能.
- 使用3%Pt/NiWO4的水分裂电解器实现了H2生产的>90%法拉戴效率;AOR主要产生酸盐.
结论:
- 在NiWO4中原子稀释的Pt兴奋剂通过优化电子结构和分析剂结合来增强电催化活性.
- Pt/NiWO4材料作为水和氨电解的双功能催化剂.
- 这种低Pt兴奋剂的NiWO4是一种具有成本效益和高效的多式联通电催化剂,用于气生成.
更多相关视频
09:02Synthesis of Platinum-nickel Nanowires and Optimization for Oxygen Reduction Performance
Published on: April 27, 2018
7.7K
08:40Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production
Published on: December 6, 2021
3.5K
相关概念视频
00:52Washing, Drying, and Ignition of Precipitates
5.8K
After filtration, the precipitate is washed to remove coprecipitated impurities and any remaining mother liquor. Colloidal precipitates, such as silver chloride, are washed with an electrolyte (such as dilute nitric acid) to prevent the peptization of the precipitate. In the case of slightly soluble precipitates, the wash solution contains a common ion to reduce solubility. Lead sulfate, which is slightly soluble in water, is washed with dilute sulfuric acid. Similarly, wash solutions may be...
5.8K
01:08Electrodeposition
2.7K
Electrodeposition is a technique used to separate an analyte from interferents by electrochemical processes. Here, the analyte is a metal ion that can be deposited on an electrode immersed in the sample solution. The electrochemical setup consists of an anode and a cathode. When an electric current is applied to the setup, oxidation occurs at the anode. At the cathode, which consists of a large metal surface, metal ions undergo reduction and deposit onto the surface.
Electrodeposition can...
Electrodeposition can...
2.7K