Electrocatalysis of layered Group 5 metallic transition metal dichalcogenides (MX2, M = V, Nb, and Ta; X = S, Se, and Te) Xinyi Chia, Adriano Ambrosi, Petr Lazar, Zdeněk Sofer, Martin Pumera* Journal Of Materials Chemistry A 2016, 4(37), 14241-14253