在无形Ni(OH)2纳米片上获得负电荷的Pt单个原子,在进化过程中促进吸收
Yue Liu1,2, Gui Liu1, Xiangyu Chen1
1School of Chemistry, Beijing Advanced Innovation Center for Biomedical Engineering, Key Laboratory of Bio-inspired Smart Interfacial Science and Technology, Beihang University, Beijing, 100191, People's Republic of China.
Nano-micro letters
|May 23, 2024
概括
研究人员开发了一种新的单原子 (SA) 催化剂,通过将 (Pt) 与 (Ni) 位点结合. 这种Pt-Ni结合催化剂在性电解质中表现出增强的演化反应活性,性能优于商业催化剂.
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
- 催化剂是一种催化剂.
背景情况:
- 单原子 (SA) 催化剂在电解中提供了高原子利用率和催化性能.
- 目前的SA催化剂由于固定的原子结合,限制了活动监管,因此具有有限的可调性.
研究的目的:
- 构建一个Pt-Ni结合的单原子催化剂,具有可调节的电子状态.
- 研究性进化的增强电催化活性机制.
主要方法:
- 无形Ni(OH) 2纳米板阵列的电化学还原.
- 对X射线吸收细结构 (XAFS) 的分析.
- 第一原则计算.第一原则计算.
- 在现场拉曼光谱.
主要成果:
- 成功合成了与Ni位点 (Pt-Ni) 结合的Pt SA,从而产生负电荷的Pt (Ptδ-).
- 从无形Ni(OH) 2向Pt SA站点展示了增强的原子吸收和溢出.
- 在 -1000 mA cm−2 mg−1Pt 的低超电位达到 48 mV 的性进化的低超电位,超过商业 Pt/C.
结论:
- -结合策略使SA催化剂局部结构和电子状态的可控调节成为可能.
- 这种方法为设计高效的电催化剂提供了一条新的途径,用于的进化.
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