Reaction-Driven Restructuring of Rh-Pd and Pt-Pd Core-Shell   Nanoparticles

doi:10.1126/science.1164170

CORC > 北京大学 > 化学与分子工程学院

	Reaction-Driven Restructuring of Rh-Pd and Pt-Pd Core-Shell Nanoparticles
	Tao, Feng ; Grass, Michael E. ; Zhang, Yawen ; Butcher, Derek R. ; Renzas, James R. ; Liu, Zhi ; Chung, Jen Y. ; Mun, Bongjin S. ; Salmeron, Miquel ; Somorjai, Gabor A.
刊名	science
	2008
关键词	SURFACE CATALYSTS CHEMISTRY METALS
DOI	10.1126/science.1164170
英文摘要	Heterogeneous catalysts that contain bimetallic nanoparticles may undergo segregation of the metals, driven by oxidizing and reducing environments. The structure and composition of core- shell Rh(0.5)Pd(0.5) and Pt(0.5)Pd(0.5) nanoparticle catalysts were studied in situ, during oxidizing, reducing, and catalytic reactions involving NO, O(2), CO, and H(2) by x- ray photoelectron spectroscopy at near-ambient pressure. The Rh(0.5)Pd(0.5) nanoparticles underwent dramatic and reversible changes in composition and chemical state in response to oxidizing or reducing conditions. In contrast, no substantial segregation of Pd or Pt atoms was found in Pt(0.5)Pd(0.5) nanoparticles. The different behaviors in restructuring and chemical response of Rh(0.5)Pd(0.5) and Pt(0.5)Pd(0.5) nanoparticle catalysts under the same reaction conditions illustrates the flexibility and tunability of the structure of bimetallic nanoparticle catalysts during catalytic reactions.; Multidisciplinary Sciences; SCI(E); 424; ARTICLE; 5903; 932-934; 322
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/397108]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	Tao, Feng,Grass, Michael E.,Zhang, Yawen,et al. Reaction-Driven Restructuring of Rh-Pd and Pt-Pd Core-Shell Nanoparticles[J]. science,2008.
APA	Tao, Feng.,Grass, Michael E..,Zhang, Yawen.,Butcher, Derek R..,Renzas, James R..,...&Somorjai, Gabor A..(2008).Reaction-Driven Restructuring of Rh-Pd and Pt-Pd Core-Shell Nanoparticles.science.
MLA	Tao, Feng,et al."Reaction-Driven Restructuring of Rh-Pd and Pt-Pd Core-Shell Nanoparticles".science (2008).