skip to main content

SciTech ConnectSciTech Connect

Title: Size and alloying induced shift in core and valence bands of Pd-Ag and Pd-Cu nanoparticles

In this report, X-ray photoelectron spectroscopy studies have been carried out on Pd, Ag, Cu, Pd-Ag, and Pd-Cu nanoparticles having identical sizes corresponding to mobility equivalent diameters of 60, 40, and 20 nm. The nanoparticles were prepared by the gas phase synthesis method. The effect of size on valence and core levels in metal and alloy nanoparticles has been studied by comparing the values to those with the 60 nm nanoparticles. The effect of alloying has been investigated by comparing the valence and core level binding energies of Pd-Cu and Pd-Ag alloy nanoparticles with the corresponding values for Pd, Ag, and Cu nanoparticles of identical sizes. These effects have been explained in terms of size induced lattice contractions, alloying induced charge transfer, and hybridization effects. The observation of alloying and size induced binding energy shifts in bimetallic nanoparticles is important from the point of view of hydrogen reactivity.
Authors:
;  [1] ;  [2]
  1. Thin Film Laboratory, Department of Physics, Indian Institute of Technology Delhi, New Delhi 110016 (India)
  2. Surface Physics Group, National Physical Laboratory (CSIR), New Delhi 110012 (India)
Publication Date:
OSTI Identifier:
22271173
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 115; Journal Issue: 12; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 77 NANOSCIENCE AND NANOTECHNOLOGY; BINDING ENERGY; COMPARATIVE EVALUATIONS; COPPER ALLOYS; CRYSTAL LATTICES; HYDROGEN; NANOSTRUCTURES; PALLADIUM ALLOYS; PARTICLE SIZE; PARTICLES; SILVER ALLOYS; VALENCE; X-RAY PHOTOELECTRON SPECTROSCOPY