Please use this identifier to cite or link to this item: http://hdl.handle.net/10995/111328
Title: W Doping in Ni12P5as a Platform to Enhance Overall Electrochemical Water Splitting
Authors: Ghosh, S.
Kadam, S. R.
Kolatkar, S.
Neyman, A.
Singh, C.
Enyashin, A. N.
Bar-Ziv, R.
Bar-Sadan, M.
Issue Date: 2022
Publisher: American Chemical Society
American Chemical Society (ACS)
Citation: W Doping in Ni12P5as a Platform to Enhance Overall Electrochemical Water Splitting / S. Ghosh, S. R. Kadam, S. Kolatkar et al. — DOI 10.3367/UFNe.2020.12.038898 // ACS Applied Materials and Interfaces. — 2022. — Vol. 14. — Iss. 1. — P. 581-589.
Abstract: Bifunctional electrocatalysts for efficient hydrogen generation from water splitting must overcome both the sluggish water dissociation step of the alkaline hydrogen evolution half-reaction (HER) and the kinetic barrier of the anodic oxygen evolution half-reaction (OER). Nickel phosphides are a promising catalysts family and are known to develop a thin active layer of oxidized Ni in an alkaline medium. Here, Ni12P5 was recognized as a suitable platform for the electrochemical production of γ-NiOOH-a particularly active phase-because of its matching crystallographic structure. The incorporation of tungsten by doping produces additional surface roughness, increases the electrochemical surface area (ESCA), and reduces the energy barrier for electron-coupled water dissociation (the Volmer step for the formation of Hads). When serving as both the anode and cathode, the 15% W-Ni12P5 catalyst provides an overall water splitting current density of 10 mA cm-2 at a cell voltage of only 1.73 V with good durability, making it a promising bifunctional catalyst for practical water electrolysis. © 2021 American Chemical Society.
Keywords: DFT CALCULATIONS
NICKEL PHOSPHIDE
OXYGEN EVOLUTION REACTION
STRUCTURE-FUNCTION RELATIONSHIP
Γ-NIOOH
DISSOCIATION
ELECTROCATALYSTS
ELECTRODES
HYDROGEN PRODUCTION
OXYGEN
PHOSPHORUS COMPOUNDS
SURFACE ROUGHNESS
BIFUNCTIONAL ELECTROCATALYSTS
DFT CALCULATION
ELECTROCHEMICALS
HALF-REACTIONS
STRUCTURE-FUNCTION RELATIONSHIP
W-DOPING
WATER DISSOCIATION
WATER SPLITTING
]+ CATALYST
Γ-NIOOH
NICKEL COMPOUNDS
URI: http://hdl.handle.net/10995/111328
Access: info:eu-repo/semantics/openAccess
SCOPUS ID: 85122593524
PURE ID: 29563699
ISSN: 1944-8244
DOI: 10.3367/UFNe.2020.12.038898
metadata.dc.description.sponsorship: S.G. and S.K. thank the financial support of the Kreitman Post- Doctoral fellowship at the BGU. This center of excellence was supported by The Israel Science Foundation (grant no. 1212/21).
Appears in Collections:Научные публикации, проиндексированные в SCOPUS и WoS CC

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