Evolving catalysts evolve hydrogen
Transition metal dichalcogenides (TMDs) can be used for electrocatalytic generation of hydrogen from water. Guided by computation, Liu et al. show that high electrocatalytic activity can be achieved on the basal planes — rather than the edge sites, which are more commonly associated with high activity — of certain layered TMDs such as tantalum disulfide. The activity improves during cycling due to evolution of the catalyst morphology.
See Liu et al. 2, 17127 (2017) and News and Views by Chirdon & Wu, article 17132.