Reaction-Driven Restructuring of Rh-Pd and Pt-Pd Core-Shell Nanoparticles
Lawrence Berkeley National Laboratory · Peking University · +1 more institution
Abstract
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, O2, CO, and H2 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…
Citation impact
- FWCI
- 28.01
- Percentile
- 100%
- References
- 14
Authors
10- TFTao Feng
Lawrence Berkeley National Laboratory, Peking University, University of California, Berkeley
- MGMichael Graß
Lawrence Berkeley National Laboratory, Peking University, University of California, Berkeley
- YZYa‐Wen Zhang
Lawrence Berkeley National Laboratory, Peking University, University of California, Berkeley
- DRDerek R. Butcher
Lawrence Berkeley National Laboratory, Peking University, University of California, Berkeley
- RRRuss Renzas
Lawrence Berkeley National Laboratory, Peking University, University of California, Berkeley
Topics & keywords
- Bimetallic strip
- Catalysis
- Oxidizing agent
- Nanoparticle
- X-ray photoelectron spectroscopy
- Chemical engineering
- Chemistry
- Chemical state