Critical insights from alloys and composites of Ni-based electrocatalysts for HER on NaCl electrolyte

Ysea, Nadia B. ¹Llorente, Victoria Benavente ¹Loiacono, Antonella ¹Marquez, Lucrecia Lagucik ¹Diaz, Liliana ²Lacconi, Gabriela I. ¹Franceschini, Esteban A.¹

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作者信息

1. Univ Nacl Cordoba
2. Univ Vigo
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Abstract

It is critical to minimize the cost of materials and inputs used in hydrogen production and to create solutions for large-scale generation to reduce the cost of hydrogen produced. Seawater is a natural low-cost electrolyte with high Na+ and Cl- concentrations, among other soluble salts. Chloride ions allow a highly corrosive media to the materials typically used as electrodes. In this work, we have prepared and tested different Ni-based catalysts for hydrogen evolution in NaCl-containing solutions. NiMo alloy, Ni(WO3), and Ni(Nb2O5) composites are compared and studied from a critical point of view to find a viable solution for catalysis in seawater electrolysis. The NiMo catalyst presents a higher dissolution rate in the NaCl medium than all synthesized catalysts. Furthermore, Ni-based composites showed improved durability due to a decrease in dissolution, and an increase in catalytic activity when using Nb2O5 as the dispersed phase. The Ni(Nb2O5) electrodes presented the higher catalytic activity in NaCl solution, even higher than that found in NiMo catalyst. (C) 2022 Published by Elsevier B.V.

Key words

NiMo alloy/Tungsten oxide/Niobium oxide/Dissolution/Surface roughness factor/HYDROGEN EVOLUTION REACTION/MO ALLOY/NICKEL-MOLYBDENUM/WATER ELECTROLYSIS/OXYGEN EVOLUTION/CATALYSTS/SEAWATER/OXIDE/ELECTRODEPOSITION/PERFORMANCE

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出版年

2022

Journal of Alloys and Compounds

EISCI

ISSN：0925-8388

被引量8

参考文献量69

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