在C2+酒精电氧化反应中增强C-C裂变的双金属纳米线
Kecheng Wei1, Honghong Lin1, Xueru Zhao2
1Department of Chemistry, Brown University, Providence, Rhode Island 02912, United States.
Journal of the American Chemical Society
|August 22, 2023
概括
我们开发了新的金/ (Au/Pt) 芯/外纳米线, 这一突破推动了可再生能源和直接酒精燃料电池的发展.
科学领域:
- 材料科学
- 电化学
- 可再生能源
背景情况:
- 对于直接的酒精燃料电池来说,高效的酒精氧化为二氧化碳至关重要.
- 开发先进的催化剂是可再生能源应用的关键.
研究的目的:
- 合成和评估核心/外Au/Pt纳米线 (NWs) 作为酒精电氧化的催化剂.
- 研究结构与活性之间的关系,以提高催化性能.
主要方法:
- 具有阶段结构的核心/外Au/Pt纳米线的合成.
- 对酒精氧化 (乙醇,甲醇,n-醇,乙烯基醇) 的电化学测试.
- 在现场光谱 (X射线吸收,红外线) 和DFT计算用于机械研究.
主要成果:
- 具有阶段集群的Au/Pt NW显示出高乙醇电氧化活性 (196.9 A/mgPt).
- 最佳的Au/Pt比率 (Au1.0/Pt0.2) 显示出最高的分级位点和催化活性.
- 催化剂有效氧化了各种初级酒精.
结论:
- 低协调的 Pt 位点和阶段 Au NW 之间的协同作用对于高效的酒精氧化是必不可少的.
- 具有阶段性位置的核心/外结构增强了电化学氧化.
- 这项研究有助于开发高效率的直接酒精燃料电池.
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