Intermetallics as cathode materials in the electrolytic hydrogen production |
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| Affiliation: | 1. Institute of Theoretical Chemistry, Ulm University, D-89069 Ulm, Germany;2. CNRS-Institut Charles Gerhardt, UMR 5253, équipe MACS, 8 rue de l''Ecole Normale, 34296 Montpellier, France;3. Sorbonne Universités, UPMC Univ Paris 06, UMR 7574, Laboratoire de Chimie de la Matière Condensée de Paris, Collège de France, 11 place Marcelin, F-75005 Paris, France;4. Facultad de Matemática, Astronomía y Física, Instituto de Física Enrique Gaviola (IFEG-CONICET), Universidad Nacional de Córdoba, 5000 Córdoba, Argentina;1. Key Laboratory of Coal Science and Technology (Taiyuan University of Technology), Ministry of Education and Shanxi province, Taiyuan 030024, PR China;2. Training Base of State Key Laboratory of Coal Science and Technology Jointly Constructed by Shanxi Province and Ministry of Science and Technology, Taiyuan 030024, PR China;3. Southern Illinois University Carbondale, Carbondale, IL 62901, USA |
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| Abstract: | The intermetallics of transition metals have been investigated as cathode materials for the production of hydrogen by electrolysis from water–KOH solutions, in an attempt to increase the electrolytic process efficiency. We found that the best effect among all investigated cathodes (Hf2Fe, Zr–Pt, Nb–Pd(I), Pd–Ta, Nb–Pd(II), Ti–Pt) exhibits the Hf2Fe phase. These materials were compared with conventional cathodes (Fe and Ni), often used in the alkaline electrolysis. A significant upgrade of the electrolytic efficiency using intermetallics, either in pure KOH electrolyte or in combination with ionic activators added in situ, was achieved.The effects of these cathode materials on the process efficiency were discussed in the context of transition metal features that issue from their electronic configuration. |
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