The valence band (VB) structures of face-centered-cubic Ag-Rh alloy nanoparticles (NPs), which are known to have excellent hydrogen-storage properties, were investigated using bulk-sensitive hard x-ray photoelectron spectroscopy. The observed VB spectra profiles of the Ag-Rh alloy NPs do not resemble simple linear combinations of the VB spectra of Ag and Rh NPs. The observed VB hybridization was qualitatively reproduced via a first-principles calculation. The electronic structure of the Ag0.5Rh0.5 alloy NPs near the Fermi edge was strikingly similar to that of Pd NPs, whose superior hydrogen-storage properties are well known.
The valence band structure of AgxRh1–x alloy nanoparticles
Anli Yang, Osami Sakata, Kohei Kusada, Tomoe Yayama, Hideki Yoshikawa, Takayoshi Ishimoto, Michihisa Koyama, Hirokazu Kobayashi, Hiroshi Kitagawa; The valence band structure of AgxRh1–x alloy nanoparticles. Appl. Phys. Lett. 13 October 2014; 105 (15): 153109. https://doi.org/10.1063/1.4896857
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