Catalytic roles and synergetic effects of iron-group elements on monometals and alloys for electrochemical oxidation of ammonia

Sho Kitano, Mei Lee Ooi, Tomokazu Yamamoto, Syo Matsumura, Miho Yamauchi

研究成果: Contribution to journalArticle査読

抄録

Electrooxidation of NH3 has gained extensive attention for energy and environmental applications such as fuel cells and water purification. In this study, carbon-supported simple metal-nanoparticle, binary- and ternary-nanoalloy (NA) catalysts composed of Fe-group elements, i.e., Fe, Co and Ni, were synthesized and their catalytic performance for NH3 electrooxidation in alkaline media was investigated. Cyclic voltammetry and chronoamperometry revealed that Ni-containing catalysts show appropriate activities for NH3 electrooxidation and the catalytic performances of Fe-group catalysts depend on affinity between constituent metals and nitrogen. Each Fe-group element exhibited distinctive catalytic features for the NH3 electrooxidation, i.e., Ni ensured chemical stability, Fe effectively reduced overpotential and Co increased current density. The ternary NA catalyst showed excellent activities due to combination of all the catalytic features and synergetic effects exerted by the alloying.

本文言語英語
ページ(範囲)1292-1299
ページ数8
ジャーナルBulletin of the Chemical Society of Japan
94
4
DOI
出版ステータス出版済み - 2021

All Science Journal Classification (ASJC) codes

  • 化学 (全般)

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