摘要
The conversion of methane to syngas(H_(2) and CO)is an important route to produce high value-added products.Oxidize methane into syngas in the absence of gaseous oxidants is an economical route.In this work,NiO-MgO composite is successfully synthesized via an impregnation method.At 764 K,methane is directly converted to syngas on the NiO-MgO without gaseous oxidants.A synergistic effect of NiO and MgO was observed,in which NiO induced lattice oxygen of MgO mobility to oxidize methane and suppressed the formation of intermediates for side reaction.As a result,NiO-MgO exhibited enhancement of catalytic activity with the H2 production rate of 1241.0µmol g^(-1) min^(-1),which was 3.4 times higher than that of pure MgO.This work provides a direct guidance to understand of methane oxidation via lattice oxygen under low temperature(<773 K).
基金
financially supported by the Sichuan Provincial International Cooperation Project,China(Nos.2019YFH0164 and 2021YFH0055).
