MATERIALS TRANSACTIONS
Online ISSN : 1347-5320
Print ISSN : 1345-9678
ISSN-L : 1345-9678
Surface Properties of Air-Exposed α-Ti–Pd Alloys via XPS and Cross-Coupling Reaction
Ryota KondoSeiya NakamichiRyusei AzumaYuya TakahashiYasushi OboraHiroyuki T. Takeshita
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JOURNALS FREE ACCESS Advance online publication

Article ID: M2018240

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Abstract

To identify the reasons why Ti–Pd alloys for hydrogen storage materials show good hydrogenation properties, X-ray photoelectron spectroscopy and the Suzuki–Miyaura cross-coupling reaction were used to investigate a small amount of Pd added Ti–Pd alloys. Pd in or on Ti oxide films is in a valence state of 0 (Pd0). Catalytic activity was shown by Pd0 in the Suzuki–Miyaura cross-coupling reaction. Therefore, the enhanced hydrogenation properties of Ti–Pd alloys for hydrogen storage materials is due to Pd0’s catalytic activity in dissociating hydrogen molecules. In addition, the potential catalytic activity of Ti–Pd alloys was shown to be based on a Pd catalyst.

XPS and cross-coupling reaction (CCR) were used to investigate the surface property of Pd in Ti-Pd alloys. Pd was present in a valence state of 0. Despite the flack-like shape of the alloy, the cross-coupling reaction proceeded up to 94% in product without pretreatment, such as heating in H2 atmosphere and in air conditions. Fullsize Image
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© 2018 The Japan Institute of Metals and Materials
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