International Journal of Hydrogen Energy Available online 21 March 2018 In Press, Corrected Proof — Note to users Short Communication Hydrogen production by water-gas shift reaction over Co-promoted MoS2/Al2O3 catalyst: The intrinsic activities of Co-promoted and unprompted sites Jianjun Chena, b, Jincheng Zhanga, Jinxing Mia, Elizabeth Dominguez Garciac, Yanning Caoa, Lilong Jianga, , , Laetitia Olivieroc, , , Françoise Maugéc Received 6 November 2017, Revised 11 February 2018, Accepted 28 February 2