Ag-M (M: Ni, Co, Cu, Fe) bimetal catalysts prepared by galvanic deposition method for CO oxidation

作者：Mahara Yuji^*; Ishikawa Hiroyuki; Ohyama Junya; Sawabe Kyoichi; Satsuma Atsushi^*

来源：Catalysis Today, 2016, 265: 2-6.

DOI：10.1016/j.cattod.2015.11.043

• CO oxidation
• Galvanic deposition
• Ag catalyst
• Bimetal catalyst

Ag-M (M: Fe, Co, Ni, Cu) bimetal catalysts supported on SiO2 were prepared by galvanic deposition (GD) method. HAADF-STEM observation and EDX elemental mapping showed that Ag was successfully introduced on Fe, Co, Ni, and Cu particles using the GD method. Ag-Fe, Ag-Co, and Ag-Cu catalysts showed Janus structure that is Ag nanoparticles (NPs) on the 3d metals. On the other hand, Ag-Ni catalyst showed core-shell like structure composed of small Ag NPs (<10 nm) or thin layer on Ni particles. The catalytic activities of Ag-M bimetal catalysts were evaluated by CO oxidation reaction. All Ag-M bimetal catalysts showed higher catalytic activities than Fe, Co, Ni, Cu, and Ag mono-metal catalysts. In particular, Ag-Ni bimetal catalyst having core-shell like structure showed remarkable enhancement of the catalytic activity.

• 出版日期2016-5-1