MoSx@NiO Composite Nanostructures : An Advanced Nonprecious Catalyst for Hydrogen Evolution Reaction in Alkaline Media
Ibupoto, Zafar Hussain (University of Sindh Jamshoro)
Tahira, Aneela (Luleå University of Technology. Department of Engineering Sciences and Mathematics)
Tang, PengYi (Institut Català de Nanociència i Nanotecnologia)
Liu, Xianjie (Linkoping University. Department of Physics)
Morante, Joan Ramon (Institut de Recerca en Energia de Catalunya)
Fahlman, Mats (Linkoping University. Department of Physics)
Arbiol i Cobos, Jordi (Institut Català de Nanociència i Nanotecnologia)
Vagin, Mikhail (Linkoping University. Department of Physics)
Vomiero, Alberto (Luleå University of Technology. Department of Engineering Sciences and Mathematics)

Data:	2019
Resum:	The design of the earth-abundant, nonprecious, efficient, and stable electrocatalysts for efficient hydrogen evolution reaction (HER) in alkaline media is a hot research topic in the field of renewable energies. A heterostructured system composed of MoS deposited on NiO nanostructures (MoS @NiO) as a robust catalyst for water splitting is proposed here. NiO nanosponges are applied as cocatalyst for MoS in alkaline media. Both NiO and MoS @NiO composites are prepared by a hydrothermal method. The NiO nanostructures exhibit sponge-like morphology and are completely covered by the sheet-like MoS . The NiO and MoS exhibit cubic and hexagonal phases, respectively. In the MoS @NiO composite, the HER experiment in 1 m KOH electrolyte results in a low overpotential (406 mV) to produce 10 mA cm current density. The Tafel slope for that case is 43 mV per decade, which is the lowest ever achieved for MoS -based electrocatalyst in alkaline media. The catalyst is highly stable for at least 13 h, with no decrease in the current density. This simple, cost-effective, and environmentally friendly methodology can pave the way for exploitation of MoS @NiO composite catalysts not only for water splitting, but also for other applications such as lithium ion batteries, and fuel cells.
Ajuts:	Agència de Gestió d'Ajuts Universitaris i de Recerca 2017/SGR-327 Agència de Gestió d'Ajuts Universitaris i de Recerca 2017/SGR-1246 Ministerio de Economía y Competitividad ENE2017-85087-C3 Ministerio de Economía y Competitividad SEV-2013-0295
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Llengua:	Anglès
Document:	Article ; recerca ; Versió sotmesa a revisió
Matèria:	Alkaline media ; Electrolysis ; MoSx@NiO composites
Publicat a:	Advanced functional materials, Vol. 29, Issue 7 (February 2019) , art. 1807562, ISSN 1616-3028

DOI: 10.1002/adfm.201807562

Preprint 29 p, 2.1 MB

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