化:含量对基介质中氧化演变反应的活性和稳定性的影响
Fatemeh Poureshghi1,2, Frode Seland1, Jens Oluf Jensen3
1Department of Materials Science and Engineering, Norwegian University of Science and Technology (NTNU), Trondheim, N-7491, Norway.
ChemSusChem
|August 28, 2024
概括
化纳米颗粒中的金属与的比率显著影响了它们对氧演化反应 (OER) 的催化活性. 通过in-situ方法合成的化纳米颗粒表现出优越的OER性能,与ex-situ方法相比.
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:
- 酸 (Ni-P) 纳米粒子是氧化演化反应 (OER) 的有希望的电催化剂.
- 金属与的比率是影响Ni-P纳米粒子催化性能的关键因素.
- 了解合成依赖性质对于优化OER催化剂至关重要.
研究的目的:
- 系统地研究Ni-P纳米颗粒中的金属与比对其OER催化活性的影响.
- 通过in-situ和ex-situ化路径合成的Ni-P纳米颗粒的OER性能进行比较.
- 评估Ni-P纳米颗粒的稳定性和铁杂质对其催化活性的影响.
主要方法:
- 使用两个不同的路径合成Ni-P纳米粒子:in-situ和ex-situ化.
- 在现场化涉及两步,一合成产生Ni12P5或Ni2P纳米晶体.
- 现场化涉及在不同大气层 (H2/Ar,Ar,空气) 中预先合成的纳米颗粒的化,以形成NixPy纳米颗粒.
主要成果:
- 通过in-situ化合成的Ni-P纳米颗粒 (特别是Ni12P5) 显示出优异的OER电催化活性.
- 通过现场化合成的[NixPy-air]纳米粒子表现出良好的OER活性,并且与其他现场变体相比显著提高了稳定性.
- 电解质中偶然和尖铁的存在被发现会影响所有合成的Ni-P纳米颗粒的OER性能.
结论:
- Ni-P纳米颗粒中的金属与的比率是其OER催化活性和稳定性的关键决定因素.
- 在现场合成路线为在Ni-P纳米颗粒中实现高OER性能提供了优势.
- 需要进行进一步的研究,以了解电解质中的铁杂质对Ni-P纳米粒子电催化物的作用.
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