Developent of Multi-monolayer-type Catalysts for Direct Ammonia Fuel Cells

点击翻译按钮获取中文摘要

Multi-walled carbon nanotube (MWCNT) supported multi-layered shell core noble metal particles has been developed by an ethanol reduction method. The successful combination of metals were Pt outer shell / Ir inner shell / Pd core and Pt outer shell / Ir inner shell / Rh core. It is demonstrated that the overpotential of Pt/Ir/Rh/MWCNT by the ethanol reduction method was lower than that of Pt and Pt/Ir/MWCNT, suggesting that the electronic state of a shell metal was influenced by the core metal to change the catalytic activity toward ammonia oxidation in the case of two layer shells. Thus, it is suggested that multilayer shells enable to adjust the adsorption energy of Nads which is a poisoning specie of ammonia oxidation.