Tailoring widely used ammonia synthesis catalysts for H and N poisoning resistance

Kulbir Kaur Ghuman, Kota Tozaki, Masaaki Sadakiyo, Sho Kitano, Takashi Oyabe, Miho Yamauchi

    Research output: Contribution to journalArticlepeer-review

    1 Citation (Scopus)

    Abstract

    Despite many advancements, an inexpensive ammonia synthesis catalyst free from hydrogen and nitrogen poisoning, and capable of synthesizing ammonia under mild conditions is still unknown and is long sought-after. Here we present an active nanoalloy catalyst, RuFe, formed by alloying highly active Ru and inexpensive Fe, capable of activating both N2 and H2 without blocking the surface active sites and thereby overcoming the major hurdle faced by the current best performing pure metal catalysts. This novel RuFe nanoalloy catalyst operates under milder conditions than the conventional Fe catalyst and is less expensive than the so far best performing Ru-based catalysts providing additional advantages. Most importantly, by integrating theory and experiments, we identified the underlying mechanisms responsible for lower surface poisoning of this catalyst, which will provide directions for fabricating poison-free efficient NH3 synthesis catalysts in future.

    Original languageEnglish
    Pages (from-to)5117-5122
    Number of pages6
    JournalPhysical Chemistry Chemical Physics
    Volume21
    Issue number9
    DOIs
    Publication statusPublished - 2019

    All Science Journal Classification (ASJC) codes

    • Physics and Astronomy(all)
    • Physical and Theoretical Chemistry

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