First principles calculation of CH4 decomposition on nickel (111) surface Rizal Arifin, Yasushi Shibuta, Kohei Shimamura and Fuyuki Shimojo Eur. Phys. J. B, 88 11 (2015) 303 Published online: 18 November 2015 DOI: 10.1140/epjb/e2015-60557-7