title: Atomic-layer-deposited ultrafine MoS2nanocrystals on cobalt foam for efficient and stable electrochemical oxygen evolution.
abstract: Ultrafine molybdenum sulfide (MoS2) nanocrystals are grown on a porous cobalt (Co) foam current collector by atomic layer deposition (ALD) using molybdenum hexacarbonyl and hydrogen sulfide as precursors. When used to catalyze the oxygen evolution reaction (OER), the optimal Co@MoS2electrode, even with a MoS2loading as small as 0.06 mg cm-2, exhibits a large cathodic shift of ca. 200 mV in the onset potential (the potential at which the current density is 5 mA cm-2), a low overpotential of only 270 mV to attain an anodic current density of 10 mA cm-2, much smaller charge transfer resistance and substantially improved long-term stability at both low and high current densities, with respect to the bare Co foam electrode, showing substantial promise for use as an efficient, low-cost and durable anode in water electrolyzers.
authors.affiliation: International Iberian Nanotechnology Laboratory (INL), Av. Mestre Jose Veiga, 4715-330 Braga, Portugal. lifeng.liu@inl.int and State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, P. R. China.
authors.forename: Dehua
authors.identifier: http://orcid.org/0000-0002-4714-9019
authors.initials: D
authors.lastname: Xiong
authors.affiliation: State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, P. R. China.
authors.forename: Qingqing
authors.initials: Q
authors.lastname: Zhang
authors.affiliation: International Iberian Nanotechnology Laboratory (INL), Av. Mestre Jose Veiga, 4715-330 Braga, Portugal. lifeng.liu@inl.int.
authors.forename: Wei
authors.identifier: http://orcid.org/0000-0003-2802-7443
authors.initials: W
authors.lastname: Li
authors.affiliation: International Iberian Nanotechnology Laboratory (INL), Av. Mestre Jose Veiga, 4715-330 Braga, Portugal. lifeng.liu@inl.int.
authors.forename: Junjie
authors.initials: J
authors.lastname: Li
authors.affiliation: State Key Laboratory for Information Photonics & Optical Communications and School of Science, Beijing University of Posts & Telecommunications, Beijing 100876, P. R. China.
authors.forename: Xiuli
authors.initials: X
authors.lastname: Fu
authors.affiliation: Center of Physics, University of Minho, 4710-057 Braga, Portugal.
authors.forename: M F
authors.initials: MF
authors.lastname: Cerqueira
authors.affiliation: International Iberian Nanotechnology Laboratory (INL), Av. Mestre Jose Veiga, 4715-330 Braga, Portugal. lifeng.liu@inl.int and Center of Physics, University of Minho, 4710-057 Braga, Portugal.
authors.forename: Pedro
authors.initials: P
authors.lastname: Alpuim
authors.affiliation: International Iberian Nanotechnology Laboratory (INL), Av. Mestre Jose Veiga, 4715-330 Braga, Portugal. lifeng.liu@inl.int.
authors.forename: Lifeng
authors.identifier: http://orcid.org/0000-0003-2732-7399
authors.initials: L
authors.lastname: Liu