通过Pd@Pt核心电催化剂中的动态格子迁移来改善性氧化
Tonghui Zhao1, Mengting Li2, Dongdong Xiao3
1Key Laboratory of Material Chemistry for Energy Conversion and Storage (Ministry of Education), Hubei Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, 430074, P. R. China.
一种新的动态晶格迁移机制显著增强性氧化反应 (HOR) 在Pd@Pt催化剂上的活性. 这一进步提高了用于高效电催化剂的催化剂设计.
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
- 催化剂是一种催化剂.
背景情况:
- 设计高效的催化剂用于电催化,需要了解的中间行为.
- 协同的多组分催化剂通过化学分工提供了更好的性能.
研究的目的:
- 为了展示一种新的动态格子迁移机制.
- 为了研究其对性氧化反应 (HOR) 活性的影响.
主要方法:
- 使用Palladium-Platinum核心外 (Pd@Pt) 的纳米粒子.
- 使用电化学化和脱过程.
- 在现场分析以追踪格子 (LH) 动态.
主要成果:
- 与纯Pd相比,Pd@Pt催化剂的性HOR活性增加了两个数量级.
- 质量活动增强达到了商业Pt.的约31.8倍.
- 证明了一种动态的LH迁移机制,涉及PdHx形成和脱,增强表面Pt位点并降低Volmer阶段能量屏障.
结论:
- 动态晶格迁移机制显著增强了HOR活动.
- PdHx充当气储存器,促进了对Pt表面的连续气供应.
- 这种机制为设计用于相关能源应用的先进电催化剂提供了新的途径.
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