碳支对单分散Co45Pt55纳米粒子在性介质中氧气演变的活性的影响
Stevan Andrić1,2, Jadranka Milikić1, Melike Sevim3
1Faculty of Physical Chemistry, University of Belgrade, Belgrade, Serbia.
Frontiers in chemistry
|August 23, 2023
概括
我们在碳支器上开发了新的- (CoPt) 合金纳米粒子,用于高效的氧化演化反应 (OER) 催化. 与其他材料相比,CoPt/rGO表现出卓越的性能,显示出较低的超电位和较高的电流密度.
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
- 纳米技术纳米技术
背景情况:
- 氧化演化反应 (OER) 对水电解器和燃料电池等能量转化设备至关重要.
- 提高性介质的OER效率对于推进这些技术至关重要.
研究的目的:
- 制造和评估用于性OER的不同碳材料上支持的新型CoPt合金纳米粒子电催化剂.
- 将CoPt/rGO,CoPt/mpg-CN和CoPt/KB与商业CoPt/C的OER性能进行比较.
主要方法:
- Co45Pt55合金纳米粒子 (NP) 的合成.
- 在减少的石墨烯氧化物 (rGO),半孔石墨碳化物 (mpg-CN) 和黑色碳 (KB) 上组装NP.
- 电化学表征使用电压测量,时测量,时间电压测量和电化学阻抗光谱学.
主要成果:
- 与CoPt/mpg-CN和CoPt/KB相比,CoPt/rGO表现出较低的OER过量的潜力和较高的电流密度.
- 与商业 CoPt/C 相比,CoPt/rGO 显示出更高的特定电流密度.
- 电催化剂活性随着温度升至85°C而增加,由更高的交换电流密度表明.
- 在所有催化剂中观察到类似的电荷转移阻力,但CoPt/rGO实现了更高的电流密度.
结论:
- CoPt/rGO 是一个有前途的电催化剂,可以在性介质中有效地进行开放式反应.
- 在开放式资源两极化下的物质不稳定性仍然是未来研究和开发的挑战.
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