NieCo/Mg(Al)O　alloy　catalysts　with　different　Co/Ni　molar　ratios　have　been　prepared　from　Ni-and　Co-substituted　Mg-Al　hydrotalcite-like　compounds　(HTlcs)　as　precursors　and　tested　for　dry　reforming　of　methane.　The　XRD　characterization　shows　that　Ni-Co-Mg-Al　HTlcs　are　decomposedby　calcination　into　Mg(Ni,Co,Al)O　solid　solution,　and　by　reduction　finely　dispersed　alloy　particles　are　formed.　H-2-TPR　indicates　a　strong　interaction　between　nickel/cobalt　oxides　and　magnesia,　and　the　presence　of　cobalt　in　Mg(Ni,Co,Al)O　enhances　the　metal-support　interaction.　STEM-EDX　analysis　reveals　that　nickel　and　cobalt　cations　are　homogeneously　distributed　in　the　HTlcs　precursor　and　in　the　derived　solid　solution,　and　by　reduction　the　resulting　Ni-Co　alloy　particles　are　composition-uniform.　The　Ni-Co/Mg(Al)O　alloy　catalysts　exhibit　relatively　high　activity　and　stability　at　severe　conditions,　i.e.,　a　medium　temperature　of　600　degrees　C　and　a　high　space　velocity　of　120000　mL　g(-1)　h(-1).　In　comparison　to　monometallic　Ni　catalyst,　NieCo　alloying　effectively　inhibits　methane　decomposition　and　coke　deposition,　leading　to　a　marked　enhancement　of　catalytic　stability.　From　CO2-TPD　and　TPSR,　it　is　suggested　that　alloying　Ni　with　Co　favors　the　CO2　adsorption/activation　and　promotes　the　elimination　of　carbon　species,　thus　improving　the　coke　resistance.　Furthermore,　a　high　and　stable　activity　with　low　coking　is　demonstrated　at　750　degrees　C.　The　hydrotalcite-derived　Ni-Co/Mg(Al)O　catalysts　show　better　catalytic　performance　than　many　of　the　reported　Ni-Co　catalysts,　which　can　be　attributed　to　the　formation　of　Ni-Co　alloy　with　uniform　composition,　proper　size,　and　strong　metal-support　interaction　as　well　as　the　presence　of　basic　Mg(Al)O　as　support.　(C)　2022　Hydrogen　Energy　Publications　LLC.　Published　by　Elsevier　Ltd.　All　rights　reserved.