过电位
催化作用
化学
三元运算
电化学
无机化学
过渡金属
金属
化学工程
电极
有机化学
物理化学
计算机科学
工程类
程序设计语言
作者
Sho Kitano,Mei Lee Ooi,Tomokazu Yamamoto,Syo Matsumura,Miho Yamauchi
标识
DOI:10.1246/bcsj.20210007
摘要
Abstract Electrooxidation of NH3 has gained extensive attention for energy and environmental applications such as fuel cells and water purification. Pt-based precious metal alloy catalysts have been intensively studied as anode catalysts for the NH3 electrooxidation whereas applicability of earth-abundant transition metals to catalysts has not been sufficiently examined. In this study, we synthesized carbon-supported simple metal-nanoparticle, binary- and ternary-nanoalloy (NA) catalysts composed of Fe-group elements, i.e., Fe, Co and Ni, and systematically investigated catalytic performance of these catalysts for NH3 electrooxidation in alkaline media. We found that the affinity of constituent metals to nitrogen species controls overpotential and durability for the NH3 electrooxidation on Fe-group simple monometal and NA catalysts for the first time. Furthermore, each Fe-group element shows distinctive catalytic features for the NH3 electrooxidation, i.e., Ni ensures chemical stability, Fe effectively lowers overpotential and Co increases current density. The ternary FeCoNi/C shows excellent activities due to combination of all the catalytic features and synergetic effects exerted by the alloying.
科研通智能强力驱动
Strongly Powered by AbleSci AI