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Published on: April 10, 2018
An Amorphization-Engineered Catalyst for Electrocatalytic Reduction of Nitric Oxide to Ammonia
Baixing Liu1, Youjun Yu1, Guike Zhang2
1School of Bailie Mechanical Engineering, Lanzhou City University, Lanzhou 730070, China.
Abstract:
Electrocatalytic NO-to-NH3 conversion (NORR) provides a fascinating route toward the eco-friendly and valuable production of NH3. In this study, amorphous FeS2 (a-FeS2) is first demonstrated as a high-efficiency catalyst for the NORR, showing a maximum FENH3 of 92.5% with a corresponding NH3 yield rate of 227.1 μmol h-1 cm-2, outperforming most NORR catalysts reported earlier. Experimental measurements combined with theoretical computations clarify that the exceptional NORR activity of a-FeS2 originates from the amorphization-induced upshift of the d-band center to promote the NO activation and NO-to-NH3 hydrogenation energetics.
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