Nanocrystalline Ni5P4: a hydrogen evolution electrocatalyst of exceptional efficiency in both alkaline and acidic media A. B. Laursen, K. R. Patraju, M. J. Whitaker, M. Retuerto, T. Sarkar, N. Yao , K. V. Ramanujachary, M. Greenblatt and G. C. Dismukes Energy Environ. Sci., 2015, Advance Article DOI: 10.1039/C4EE02940B Link: http://pubs.rsc.org/en/content/articlelanding/2015/ee/c4ee02940b#!divAbstract Thank you very much.