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  • Title: Tandem Electrocatalytic Nitrate Reduction to Ammonia on MBenes.
    Author: Zhang G, Li X, Chen K, Guo Y, Ma D, Chu K.
    Journal: Angew Chem Int Ed Engl; 2023 Mar 20; 62(13):e202300054. PubMed ID: 36734975.
    Abstract:
    We demonstrate the great feasibility of MBenes as a new class of tandem catalysts for electrocatalytic nitrate reduction to ammonia (NO3 RR). As a proof of concept, FeB2 is first employed as a model MBene catalyst for the NO3 RR, showing a maximum NH3 -Faradaic efficiency of 96.8 % with a corresponding NH3 yield of 25.5 mg h-1  cm-2 at -0.6 V vs. RHE. Mechanistic studies reveal that the exceptional NO3 RR activity of FeB2 arises from the tandem catalysis mechanism, that is, B sites activate NO3 - to form intermediates, while Fe sites dissociate H2 O and increase *H supply on B sites to promote the intermediate hydrogenation and enhance the NO3 - -to-NH3 conversion.
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