Discovery of Hexagonal Structured Pd-B Nanocrystals

Keigo Kobayashi; Hirokazu Kobayashi; Mitsuhiko Maesato; Mikihiro Hayashi; Tomokazu Yamamoto; Satoru Yoshioka; Syo Matsumura; Takeharu Sugiyama; Shogo Kawaguchi; Yoshiki Kubota; Hiroshi Nakanishi; Hiroshi Kitagawa

doi:10.1002/anie.201703209

Discovery of Hexagonal Structured Pd-B Nanocrystals

Angew Chem Int Ed Engl. 2017 Jun 1;56(23):6578-6582. doi: 10.1002/anie.201703209. Epub 2017 May 4.

Authors

Keigo Kobayashi¹, Hirokazu Kobayashi^{1

2}, Mitsuhiko Maesato¹, Mikihiro Hayashi¹, Tomokazu Yamamoto³, Satoru Yoshioka³, Syo Matsumura^{3

4

5}, Takeharu Sugiyama⁶, Shogo Kawaguchi⁷, Yoshiki Kubota⁸, Hiroshi Nakanishi^{9

10}, Hiroshi Kitagawa^{1

5

11}

Affiliations

¹ Division of Chemistry, Graduate School of Science, Kyoto University, Kitashirakawa-Oiwakecho, Sakyo-ku, Kyoto, 606-8502, Japan.
² Precursory Research for Embryonic Science and Technology (PRESTO), Japan Science and Technology Agency (JST), 4-1-8 Honcho, Kawaguchi, Saitama, 332-0012, Japan.
³ Department of Applied Quantum Physics and Nuclear Engineering, , Graduate School of Engineering, Kyushu University, Motooka 744, Nishi-ku, Fukuoka, 819-0395, Japan.
⁴ The Ultramicroscopy Research Center, Kyushu University, Motooka 744, Nishi-ku, Fukuoka, 819-0395, Japan.
⁵ INAMORI Frontier Research Center, Kyushu University, Motooka 744, Nishi-ku, Fukuoka, 819-0395, Japan.
⁶ Research Center for Synchrotron Light Applications, Kyushu University, 6-1, Kasuga-koen, Kasuga, Fukuoka, 816-8580, Japan.
⁷ Japan Synchrotron Radiation Research Insitute (JASRI), SPring-8, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo, 679-5198, Japan.
⁸ Department of Physical Science, Graduate School of Science, Osaka Prefecture University, Sakai, Osaka, 599-8531, Japan.
⁹ National Institute of Technology, Akashi College, 679-3 Nishioka, Uozumi, Akashi, Hyogo, 674-8501, Japan.
¹⁰ Graduate School of Engineering, Osaka University, Suita, Osaka, 565-0871, Japan.
¹¹ Institute for Integrated Cell-Material Sciences (iCeMS), Kyoto University, Yoshida, Sakyo-ku, Kyoto, 606-8501, Japan.

PMID: 28471071
DOI: 10.1002/anie.201703209

Abstract

We report on hexagonal close-packed (hcp) palladium (Pd)-boron (B) nanocrystals (NCs) by heavy B doping into face-centered cubic (fcc) Pd NCs. Scanning transmission electron microscopy-electron energy loss spectroscopy and synchrotron powder X-ray diffraction measurements demonstrated that the B atoms are homogeneously distributed inside the hcp Pd lattice. The large paramagnetic susceptibility of Pd is significantly suppressed in Pd-B NCs in good agreement with the reduction of density of states at Fermi energy suggested by X-ray absorption near-edge structure and theoretical calculations.

Keywords: boron; magnetic properties; nanocrystals; palladium; solid-state chemistry.

Publication types

Research Support, Non-U.S. Gov't