Synthesis of Manganese Silicide Nanowires by Thermal Chemical Vapor Deposition for the Hydrogen Evolution Reaction
Document Type
Article
Publication Date
6-1-2023
Abstract
Thermalchemical vapor deposition investigated the growth-alignedmanganese silicide (MnSi) nanowires on a c-Si(111) substrate. Thegrowth, composition, and morphology of MnSi nanowires were studiedin detail using X-ray diffraction, transmission electron microscopy,field emission electron microscopy, and X-ray photoelectron spectroscopyat different reaction pressures (0.03, 0.12, 0.52, 1.20, and 6.20mbar). The effect of reaction pressure on the electrocatalytic activityof MnSi nanowires in the hydrogen evolution reaction (HER) was exploredfurther. Compared to higher pressure, at lower pressure (0.12 mbar),the as-synthesized MnSi nanowire exhibits the greatest electrocatalyticperformance (1.2 mbar). The electrochemical impedance spectroscopyanalysis revealed that the increase in HER electrocatalytic activityof MnSi nanowires at a lower reaction pressure of 0.12 mbar is associatedwith increasing number of charge carriers transported by a reducingdiameter of the nanowires, which is a function of the reaction pressure.
Keywords
MnSi, nanowires, thermal chemicalvapor deposition, reaction pressure, electrocatalytic, hydrogenevolution reaction
Divisions
CHEMISTRY,PHYSICS
Funders
Ministry of Higher Education Malaysia via Fundamental Research Grant Scheme (FRGS/1/2019/STG02/UM/02/7),Universiti Malaya (ST066-2021),Sussex Strategic Development Fund
Publication Title
ACS Applied Nano Materials
Volume
6
Issue
13
Publisher
American Chemical Society
Publisher Location
1155 16TH ST, NW, WASHINGTON, DC 20036 USA