Distributions of Size and Composition in Carbon-Supported Pt-Ru Composite Metal Fine-Particle Catalysts.

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  • 炭素担持微粒Ｐｔ―Ｒｕ複合金属触媒の粒径分布と粒子組成分布
  • タンソ タンジ ビリュウ Pt Ru フクゴウ キンゾク ショクバイ ノ リュ

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Abstract

Carbon-supported Pt-Ru composite catalysts that were dehydrogenation-active for alcohol under boiling conditions were prepared from the mixed chlorides RuCl3 and K2PtCl4, and from complexes with different charges [Pt3 (CO) 6] 2-4and [(C6Me6) 2Ru] 2+. The former gave broad particle-size distributions. A definite relationship between size and composition was elucidated by EDX analysis, namely that Ru-rich particles were small but Pt rich particles were large. As far as 2-propanol dehydrogenation was concerned, however, the most important factor for catalysis was the Pt/Ru ratio as a whole.

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