01570nas a2200169   4500008004100000245016400041210006900205260000800274300001400282490000600296520087000302100002601172700002001198700002301218700003001241856012901271       2016                        eng d00aIn situ electrochemical transformation of Ni3S2 and Ni3S2-Ni from sheets to nanodisks: towards efficient electrocatalysis for hydrogen evolution reaction (HER)0 aIn situ electrochemical transformation of Ni3S2 and Ni3S2Ni from  cDEC  a6708-67120 v13 aTransition metal sulphides have been viewed as alternatives to platinum based electrocatalysts for HER. Herein, we report the preparation of Ni3S2 in conjunction with Ni in a novel nanosheet morphology and verified its performance for HER. During cyclic polarization, exotic morphological transformation of Ni-3 S-2-Ni from nanosheets to nanodisks has been noted. This change is accompanied with initial increase in over-potential that passed through maxima (similar to 100mV above the starting potential) and decreased to similar to 50mV below the starting value. Enhanced electrocatalytic activity due to the morphological changes from sheets to nanodisks has been attributed to the formation of more number of exposed edge-planes known to promote HER. Kinetic analysis based on Tafel slope displayed by this composite is comparable to that of Pt based catalysts.1 aBusupalli, Balanagulu1 aBattu, Shateesh1 aHaram, Santosh, K.1 aPrasad, Bhagavatula L. V.  uhttps://library.ncl.res.in/content/situ-electrochemical-transformation-ni3s2-and-ni3s2-ni-sheets-nanodisks-towards-efficient