J. Am. Chem. Soc., 130 (6), 1818 -1819, 2008. 10.1021/ja078126k S0002-7863(07)08126-7
Web Release Date: January 15, 2008

Copyright © 2008 American Chemical Society

Hydrogen Absorption in the Core/Shell Interface of Pd/Pt Nanoparticles

Hirokazu Kobayashi, Miho Yamauchi,# Hiroshi Kitagawa,* Yoshiki Kubota, Kenichi Kato, and Masaki Takata

Department of Chemistry, Faculty of Science, Kyushu University, Hakozaki, Fukuoka 812-8581, Japan, JST PRESTO, Sanbancho 5, Chiyoda-ku, Tokyo 102-0075, Japan, JST CREST, Sanbancho 5, Chiyoda-ku, Tokyo 102-0075, Japan, Department of Physical Science, Graduate School of Science, Osaka Prefecture University, Sakai, Osaka 599-8531, Japan, and RIKEN SPring-8 Center, Sayo-gun, Hyogo 679-5148, Japan

hiroshiscc@mbox.nc.kyushu-u.ac.jp

Received October 23, 2007

Abstract:

We have investigated the hydrogen absorption behavior of Pd/Pt nanoparticles with a core/shell-type structure. From the results of the hydrogen pressure-composition (PC) isotherm and solid-state 2H NMR measurements, it was revealed that the Pd/Pt nanoparticles can absorb hydrogen, and most of the absorbed hydrogen atoms are situated around the interfacial region between the Pd core and the Pt shell of the Pd/Pt nanoparticles, indicating that the core/shell boundary plays an important role in the formation of the hydride phase of the Pd/Pt nanoparticles.

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