Electrochemical Oxidation of Size-Selected Pt Nanoparticles Studied Using in Situ High-Energy-Resolution X-ray Absorption Spectroscopy
Abbreviated Journal Title
Pt; PtOx; nanoparticle; electrocatalysis; HERFD-XAS; XANES; OXYGEN REDUCTION REACTION; FUEL-CELL CATALYSTS; PROTON-EXCHANGE; MEMBRANE; PARTICLE-SIZE; PLATINUM NANOPARTICLES; ELECTRONIC-PROPERTIES; DISPERSED PLATINUM; THERMAL-STABILITY; ELECTROCATALYSIS; SURFACE; Chemistry, Physical
High-energy-resolution fluorescence-detected Xray absorption spectroscopy (HERFD-XAS) has been applied to study the chemical state of similar to 1.2 nm size-selected Pt nanoparticles (NPs) in an electrochemical environment under potential control. Spectral features due to chemisorbed hydrogen, chemisorbed O/OH, and platinum oxides can be distinguished with increasing potential. Pt electro-oxidation follows two competitive pathways involving both oxide formation and Pt dissolution.
"Electrochemical Oxidation of Size-Selected Pt Nanoparticles Studied Using in Situ High-Energy-Resolution X-ray Absorption Spectroscopy" (2012). Faculty Bibliography 2010s. 3021.