原子精确的Au24Pt(thiolate)12(dithiolate)3纳米集群具有卓越的电催化进化反应性
Miyu Sera1, Sakiat Hossain2, Sara Yoshikawa1
1Department of Applied Chemistry, Faculty of Science, Tokyo University of Science, Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan.
Journal of the American Chemical Society
|October 15, 2024
概括
新的金 (Au-Pt) 合金纳米集群显示出显著增强的演化反应 (HER) 活性. 与现有的纳米粒子催化剂相比,这些精确结构的催化剂具有更高的性能.
科学领域:
- 纳米材料科学
- 催化剂
- 电化学
背景情况:
- 金合金 (Au-Pt) 纳米聚合物正在成为演化反应 (HER) 的有希望的催化剂.
- 之前的研究表明[Au24Pt ((C6) 18) 0对HER具有很高的活性,强调了明确的纳米结构的潜力.
研究的目的:
- 合成和描述具有量身定制的连接体外的新型Au-Pt合金纳米集群.
- 在电催化 HER 中研究这些新纳米集群的结构-活性关系.
主要方法:
- 在前体Au-Pt纳米集群 ([Au24Pt(PET) 180) 上发生联体交换反应.
- 使用单和二酸连体合成新,包括4-丁二酸 (TBBT),二酸 (TDT) 和1,3-二酸 (PDT).
- 单晶X射线衍射分析以确定精确的原子结构.
主要成果:
- 成功合成了两个新的Au-Pt合金纳米集群: [Au24Pt (TBBT) 12 (TDT) ]0和 [Au24Pt (TBBT) 12 (PDT) ]0.
- 结构分析显示,与以前的同类产品相比,有明显的 - Au ((I) -SR-Au ((I) - 紧固件长度和方向.
- 新的纳米集群显示出显著增强的HER活性,[Au24Pt (TBBT) 12 (TDT) ]0比基准催化剂活跃3.5倍,[Au24Pt (TBBT) 12 (PDT) ]0比基准催化剂活跃4.9倍.
结论:
- 连接物结构和金属连接物形状的微妙变化极大地影响了Au-Pt纳米集群的电催化性能.
- 合成的[Au24Pt (TBBT) 12 (TDT) ]0和[Au24Pt (TBBT) 12 (PDT) ]0是HER的高效电催化剂.
- 这项工作为设计用于能源转换应用的可调节性质的先进Au-Pt纳米聚合催化剂提供了洞察力.
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