Home > Articles > Published articles > MoSx@NiO Composite Nanostructures : |
Date: | 2019 |
Abstract: | 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. |
Grants: | 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 |
Rights: | Tots els drets reservats. |
Language: | Anglès |
Document: | Article ; recerca ; Versió sotmesa a revisió |
Subject: | Alkaline media ; Electrolysis ; MoSx@NiO composites |
Published in: | Advanced functional materials, Vol. 29, Issue 7 (February 2019) , art. 1807562, ISSN 1616-3028 |
Preprint 29 p, 2.1 MB |