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Hydrogen Electrode Reactions over Nickel-Based Catalysts in Alkaline Medium: Influence of Composition and Structure of Ni Particles Conference attendances

Language Английский
Participant type Устный
Conference EuropaCat-XII: 12th European Congress on Catalysis “Catalysis: Balancing the use of fossil and renewable resources”
30 Aug - 4 Sep 2015 , Казань
Tags electrocatalysis, nickel, hydrogen oxidation, hydrogen evolution, alkali
Authors Oshchepkov Alexandr G. 1,2,3 , Bonnefont Antoine 3 , Simonov Pavel Anatolʹevich 2 , Sherstyuk Olʹga Viktorovna 2 , Pronkin Sergey N. 1 , Parmon Valentin Nikolaevich 2 , Savinova Elena Romanovna 1
Affiliations
1 University of Strasbourg
2 Boreskov Institute of Catalysis SB RAS
3 University of Strasbourg

Abstract: Activity of (electro)catalysts is known to be strongly influenced by the composition and structure of the particles. After contact with air the surface of metallic Ni is oxidized to form several layers of NiO covered by α-Ni(OH)2, which further transform into β-Ni(OH)2. We demonstrate the influence of NiO/Ni(OH)2 species on the activity of Ni in the hydrogen electrode reactions in alkaline media. Electrodeposited Ni nanoparticles with different sizes was studied and compared with polycrystalline Ni disk electrode. Preparing of bimetallic Ni-based materials provides another way of changing the activity of Ni. We demonstrate the enhanced activity of carbon supported NiCu/C catalysts for the hydrogen oxidation/evolution reactions. We also developed a kinetic meanfield model which provides some insights into the mechanism of the hydrogen electrode reactions.
Cite: Oshchepkov A.G. , Bonnefont A. , Simonov P.A. , Sherstyuk O.V. , Pronkin S.N. , Parmon V.N. , Savinova E.R.
Hydrogen Electrode Reactions over Nickel-Based Catalysts in Alkaline Medium: Influence of Composition and Structure of Ni Particles
EuropaCat-XII: 12th European Congress on Catalysis “Catalysis: Balancing the use of fossil and renewable resources” 30 Aug - 4 Sep 2015