The diffuse and intermittent nature of renewable power sources such as wind and solar presents problems regarding how best to harvest the energy they produce and store it for times when the sun is not shining and the wind is not blowing. Devices that use renewable energy to split water into hydrogen and oxygen could be one solution to these problems, because hydrogen is an excellent fuel. In terms of the hydrogen evolution reaction (HER), layered transition metal chalcogenides such as MoS2 and MoTe2 hold particular promise. The proposed work is aimed at understanding the crystal structure of an emerging material for HER with a composition DxMoTe2. The access to neutron data could help us to locate the position of light atoms within the structure which appear to be responsible for a substantial improvement of electrochemical performance in MoTe2.