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Article

Nanostructured Molybdenum Oxides from Aluminium-Based Intermetallic Compound: Synthesis and Application in Hydrogen Evolution Reaction

1
Dipartimento di Chimica and Centro Interdipartimentale NIS (Nanostructured Interfaces and Surfaces), Università di Torino, V. Giuria 7, 10125 Turin, Italy
2
Istituto Nazionale di Ricerca Metrologica (INRIM), Str. Delle Cacce 91, 10135 Turin, Italy
*
Author to whom correspondence should be addressed.
Academic Editor: Mikhael Bechelany
Nanomaterials 2021, 11(5), 1313; https://doi.org/10.3390/nano11051313
Received: 30 April 2021 / Revised: 11 May 2021 / Accepted: 13 May 2021 / Published: 17 May 2021
(This article belongs to the Special Issue Metallic Oxide Nanostructures)
Characterized by a large surface area to volume ratio, nanostructured metal oxides possess unique chemical and physical properties with applications in electronics, catalysis, sensors, etc. In this study, Mo3Al8, an intermetallic compound, has been used as a precursor to obtain nanostructured molybdenum oxides. It was prepared into ribbons by arc-melting and melt-spinning techniques. Single and double-step free corrosion of the as-quenched material have been studied in 1 M KOH, 1 M HF and 1.25 M FeCl3 at room temperature. In both cases, nanostructured molybdenum oxides were obtained on a surface layer a few microns thick. Two of the as-prepared samples were tested for their electrocatalytic capability for hydrogen evolution reaction (HER) in 0.5 M H2SO4 giving low onset potential (−50 mV, −45 mV), small Tafel slopes (92 mV dec−1, 9 mV dec−1) and high exchange current densities (0.08 mA cm−2, 0.35 mA cm−2 respectively). The proposed nanostructured molybdenum oxides are cost-effective and sustainable due to the cheap and abundant starting material used and the simple synthetic route, paving the way for their possible application as HER electrocatalysts. View Full-Text
Keywords: nanostructured materials; molybdenum oxides; free corrosion; intermetallic compound; hydrogen evolution reaction nanostructured materials; molybdenum oxides; free corrosion; intermetallic compound; hydrogen evolution reaction
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MDPI and ACS Style

Raj, D.; Scaglione, F.; Fiore, G.; Celegato, F.; Rizzi, P. Nanostructured Molybdenum Oxides from Aluminium-Based Intermetallic Compound: Synthesis and Application in Hydrogen Evolution Reaction. Nanomaterials 2021, 11, 1313. https://doi.org/10.3390/nano11051313

AMA Style

Raj D, Scaglione F, Fiore G, Celegato F, Rizzi P. Nanostructured Molybdenum Oxides from Aluminium-Based Intermetallic Compound: Synthesis and Application in Hydrogen Evolution Reaction. Nanomaterials. 2021; 11(5):1313. https://doi.org/10.3390/nano11051313

Chicago/Turabian Style

Raj, Deepti, Federico Scaglione, Gianluca Fiore, Federica Celegato, and Paola Rizzi. 2021. "Nanostructured Molybdenum Oxides from Aluminium-Based Intermetallic Compound: Synthesis and Application in Hydrogen Evolution Reaction" Nanomaterials 11, no. 5: 1313. https://doi.org/10.3390/nano11051313

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