1.
Phys Chem Chem Phys
; 16(27): 13748-54, 2014 Jul 21.
Artigo
em Inglês
| MEDLINE
| ID: mdl-24788597
RESUMO
We measured the in situ polarization-dependent X-ray absorption fine structure of platinum nanoparticles (PtNPs) deposited on a flat highly oriented pyrolytic graphite (HOPG) substrate under electrochemical conditions using a back-side illumination method. In this method, the thin HOPG substrate with PtNPs deposited on one side was used as a window for incident and fluorescent X-rays, as well as an electrode. A bent crystal Laue analyzer (BCLA) was applied to the extraction of the Pt Lα fluorescent X-ray signals from strong scattered X-rays. Pt L3 edge XAFS spectra were observed for various electrode potentials and polarization directions.