Type

Journal Article

Authors

Igor Shvets
Georg Duesberg
Niall Mc Evoy
John Brendan Mc Manus

Subjects

Chemistry

Topics
hydrogen thin film electrocatalysis hydrogen evolution reaction raman spectroscopy 1t phase molybdenum ditelluride nanoscience materials electrochemical hydrogen generation thin film growth mote2

Growth of 1T′ MoTe2 by Thermally Assisted Conversion of Electrodeposited Tellurium Films (2019)

Abstract Molybdenum ditelluride (MoTe2) is a transition metal dichalcogenide (TMD) which has two phases stable under ambient conditions, a semiconducting (2H) and semimetallic (1T′) phase. Despite a host of interesting properties and potential applications, MoTe2 is one of the less-studied TMDs, perhaps due its relatively low abundance in nature or challenges associated with its synthesis, such as the toxicity of most precursors. In this report, we describe the fabrication of thin films of phase-pure 1T′ MoTe2 using predeposited molybdenum and electrodeposited tellurium layers, at the relatively low temperature of 450 °C. This method allows control over film geometry and over the tellurium concentration during the conversion. The MoTe2 films are characterized by Raman spectroscopy, X-ray photoelectron spectroscopy, X-ray diffraction, atomic force microscopy, and electron microscopies. When applied as a catalyst for the hydrogen evolution reaction, the films display promising initial results. The MoTe2 films have a Tafel slope of below 70 mV dec–1 and compare favorably with other MoTe2 catalysts reported in the literature, especially considering the inherently scalable fabrication method. The variation in electrocatalytic behavior with thickness and morphology of the films is also investigated.
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Full list of authors on original publication

Igor Shvets, Georg Duesberg, Niall Mc Evoy, John Brendan Mc Manus

Experts in our system

1
Igor Shvets
Trinity College Dublin
Total Publications: 202
 
2
Georg Duesberg
Trinity College Dublin
Total Publications: 116
 
3
Niall Mc Evoy
Trinity College Dublin
Total Publications: 20
 
4
John Brendan Mc Manus
Trinity College Dublin
Total Publications: 3