促进了基于NiFe的电催化剂的快速自我重建,以实现高效的氧气进化
Boxuan Jin1, Wenwen Zhang1, Shuaichong Wei1
1Tianjin Key Laboratory of Chemical Process Safety, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, China.
Journal of colloid and interface science
|August 1, 2024
概括
兴奋剂加速了NiFe催化剂中活性位点的形成,显著提高了氧化演化反应 (OER) 在水分裂中的性能. 这种Mg促进的策略增强了OER动力学和催化剂稳定性.
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:
- 高性能电催化剂对于高效的水分解至关重要.
- 表面重建和活性部位形成是开发先进氧化演化反应 (OER) 催化剂的关键.
- 开发具有成本效益和稳定的催化剂仍然是一个挑战.
研究的目的:
- 使用 (Mg) 促进的策略开发一种高活性和稳定的基于NiFe的催化剂,用于氧化演化反应 (OER).
- 调查Mg兴奋剂在加速表面重建和增强OER动力学中的作用.
- 为了评估Mg促进催化剂在水电解中的性能.
主要方法:
- 使用简单的一步腐蚀方法,制备了Mg-Ni/Fe2O3预催化剂.
- 现场拉曼和红外光谱学被用来研究OER期间催化剂的自我重建过程.
- 进行了理论计算,以了解胺兴奋剂对氧中间体吸附的影响.
- 在一个离子交换膜水电解仪中测试了电化学性能.
主要成果:
- 胺兴奋剂加速了Ni/Fe2O3的自我重建,形成活跃的NiOOH物种.
- 兴奋剂促进了*OOH中间体的形成和优化氧中间体吸附.
- -/铁2O3催化剂在10 mA cm-2时实现了168 mV的超电位,用于OER.
- 催化剂表现出极好的稳定性,在离子交换膜水电解器中在1.53V时达到200mA cm-2超过500小时.
结论:
- 促进策略有效地提高了基于NiFe的OER催化剂的活性和稳定性.
- 由Mg兴奋剂加速的表面重建对于高OER性能至关重要.
- 这种方法为开发高效的电催化剂用于水分应用提供了有希望的途径.
更多相关视频
09:18Simple Methods for the Preparation of Non-noble Metal Bulk-electrodes for Electrocatalytic Applications
Published on: June 21, 2017
11.4K
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
01:26Thermal and Photochemical Electrocyclic Reactions: Overview
2.3K
Electrocyclic reactions are reversible reactions. They involve an intramolecular cyclization or ring-opening of a conjugated polyene. Shown below are two examples of electrocyclic reactions. In the first reaction, the formation of the cyclic product is favored. In contrast, in the second reaction, ring-opening is favored due to the high ring strain associated with cyclobutene formation.
2.3K
03:00Electrolysis
26.2K
In a galvanic cell, the electrical work is done by a redox system on its surroundings as electrons produced by the spontaneous redox reactions are transferred through an external circuit. Alternatively, an external circuit does work on a redox system by imposing a voltage sufficient to drive an otherwise nonspontaneous reaction in a process known as electrolysis. For instance, recharging a battery involves the use of an external power source to drive the spontaneous (discharge) cell reaction in...
26.2K
03:11Oxidation-Reduction Reactions
64.6K
Oxidation–Reduction Reactions
64.6K
02:47Voltaic/Galvanic Cells
56.9K
Spontaneous Chemical Reactions
Spontaneous redox reactions occur abundantly in nature. The chemical reaction occurring in a disposable AA battery powering our remote controls is one such example of a spontaneous redox reaction. Another example is the immersion of coiled copper wire into an aqueous silver nitrate solution. The reaction shows a gradual, visually impressive color change from colorless to bright blue and the formation of a grey precipitate on the copper wire. In this experiment,...
Spontaneous redox reactions occur abundantly in nature. The chemical reaction occurring in a disposable AA battery powering our remote controls is one such example of a spontaneous redox reaction. Another example is the immersion of coiled copper wire into an aqueous silver nitrate solution. The reaction shows a gradual, visually impressive color change from colorless to bright blue and the formation of a grey precipitate on the copper wire. In this experiment,...
56.9K