Electronic asymmetry of lattice oxygen sites in ZnO promotes the photocatalytic oxidative coupling of methane.

ABSTRACT: Photocatalytic oxidative coupling of methane with oxygen is promising to obtain valuable muti-carbon products, yet suffering low reactivity. Here, we apply cerium modifications on zinc oxide-supported gold catalysts based on the electronic asymmetry design of lattice oxygen to improve the coupling activity. The methane conversion rate exceeds 16000 μmol g^-1 h^-1 with muti-carbon selectivity of 94.9% and catalytic durability of 3 days, and it can increase to 34000 μmol g^-1 h^-1 under more thermal assistance, with a turnover frequency of 507 h^-1 for ethane and an apparent quantum efficiency of 33.7% at 350 nm. According to systematic characterizations and theoretical analysis, cerium dopants not only can boost the formation of reactive oxy

SUBMITTER: Sun M 

PROVIDER: S-EPMC11568292 | biostudies-literature | 2024 Nov

REPOSITORIES: biostudies-literature