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Direct Observation of Ni–Mo Catalyst Formation via Thermal Reduction of Nickel Molybdate Nanorods

preprint
revised on 14.05.2020 and posted on 15.05.2020 by Rituja Patil, Stephen House, Aayush Mantri, Judith C. Yang, James McKone
Ni-Mo composites are known to catalyze several industrial relevant reactions involving hydrogen. Our interest is in Ni-Mo composites for hydrogen evolution reaction in alkaline anion exchange membrane water electrolyzers. We recently found that Ni-Mo composites comprise of core-shell structure where the core is metallic, rich in Ni while the shell is Mo-rich oxide. The transformation of the oxide intermediate into a core-shell architecture is studied in this work using in situ transmission electron microscopy. We reduced nickel molybdate nanorods in environmental transmission electron microscope and observed its transformation into the Ni-Mo catalyst composite. We further correlated these chemical transformations with the observed hydrogen evolution activity.

History

Email Address of Submitting Author

rbp25@pitt.edu

Institution

University of Pittsburgh

Country

United States

ORCID For Submitting Author

0000-0001-5037-448X

Declaration of Conflict of Interest

No conflict of interest

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