Division of Chemistry, Graduate School of Science, Kyoto University, Kitashirakawa-Oiwakecho, Sakyo-ku, Kyoto, 606-8502, Japan.
Precursory Research for Embryonic Science and Technology (PRESTO), Japan Science and Technology Agency (JST), 4-1-8 Honcho, Kawaguchi, Saitama, 332-0012, Japan.
Angew Chem Int Ed Engl. 2017 Jun 1;56(23):6578-6582. doi: 10.1002/anie.201703209. Epub 2017 May 4.
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.
我们通过向面心立方（fcc）钯（Pd）纳米晶体（NCs）中重掺杂硼（B）来报告六方密排（hcp）钯（Pd）-硼（B）纳米晶体（NCs）。扫描透射电子显微镜-电子能量损失光谱和同步加速器粉末 X 射线衍射测量证明，B 原子均匀分布在 hcp Pd 晶格内。X 射线吸收近边结构和理论计算表明，费米能级处态密度的减少，与 Pd-B NCs 中 Pd 的大顺磁磁化率的显著降低相吻合。
