期刊
NANOMATERIALS
卷 11, 期 5, 页码 -出版社
MDPI
DOI: 10.3390/nano11051313
关键词
nanostructured materials; molybdenum oxides; free corrosion; intermetallic compound; hydrogen evolution reaction
类别
资金
- Compagnia di San Paolo-Bando
In this study, nanostructured molybdenum oxides were successfully obtained using Mo3Al8 as a precursor. Corrosion studies in different solutions demonstrated the formation of a few microns thick layer of nanostructured molybdenum oxides. The electrocatalytic performance of these nanostructured molybdenum oxides showed promising results for hydrogen evolution reaction.
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.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据