On the Nature of Strong Hydrogen Atom Trapping Inside Pd Nanoparticles

J. Am. Chem. Soc., 130 (6), 1828 -1829, 2008. 10.1021/ja7102372 S0002-7863(71)00237-3
Web Release Date: January 18, 2008

On the Nature of Strong Hydrogen Atom Trapping Inside Pd 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 November 12, 2007

Abstract:

We have investigated the hydrogen absorption/desorption hysteresis by means of in situ powder X-ray diffraction (XRD) and solid-state ²H NMR to clarify the location of hydrogen, surface or body, and its chemical form, molecular, atomic, or as hydride. The present results point out that strongly trapped hydrogen atoms exist inside the Pd nanoparticles due to a strong Pd-H bond formation and are stabilized in the lattice of Pd nanoparticles, compared to bulk Pd.

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