4.6 Article

The reactivity of lattice nitrogen within the Ni2Mo3N and NiCoMo3N phases

Journal

MATERIALS RESEARCH BULLETIN
Volume 118, Issue -, Pages -

Publisher

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.materresbull.2019.110519

Keywords

Nitride; Catalysis; Ammonia synthesis; Neutron diffraction; isotopic exchange

Funding

  1. UK Engineering and Physical Sciences Research Council [EP/J018384/1, EP/J019208/1, EP/L02537X/1]
  2. government of Saudi Arabia [5-23-671]
  3. EPSRC [EP/L02537X/1, EP/J019208/1, EP/J018384/1] Funding Source: UKRI

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In this study, the reactivity of bulk lattice nitrogen within the filled beta-Mn structured Ni2Mo3N phase has been investigated by application of powder neutron diffraction and heterolytic nitrogen isotopic exchange measurements. In contrast to Co3Mo3N, despite the similarity in the N immediate local environment comprising NMo6 octahedra, its reactivity is found to be limited and this lower reactivity was maintained upon the introduction of a significant proportion of cobalt to yield its filled beta-Mn structured CoNiMo3N quaternary nitride counterpart.

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