Photocatalytic Oxidative Coupling of Methane over SrTiO3 Overlayers on Au Nanoparticles.

Authors

Xueyuan Wang, Pu Guo, Chenwei Ni, Xiaoju Cui, Ruotian Chen, Jianping Xiao, Nengchao Luo, Feng Wang

Published in

Journal of the American Chemical Society. Volume 148. Issue 29. Pages 30826-30835. Jul 29, 2026.

Abstract

Photocatalytic oxidative coupling of methane (OCM) is a prevailing method to access multicarbon (C2+) hydrocarbons. However, the kinetically slow C-C coupling of the methyl radical hinders the overall methane coupling reaction and leads to overoxidation side reactions. Here we report photocatalytic OCM over SrTiO3 supported, SrTiO3 overlayer coated Au nanoparticles (Au@SrTiO3). The SrTiO3 support and overlayers capture photogenerated holes to activate the methane C-H bond. C-C coupling between the methyl radical intermediate is rate limiting and occurs with an improved selectivity of 93% over the SrTiO3 overlayers on Au nanoparticles (NPs). The Au@SrTiO3 catalyst is stable for more than 300 h, affording C2H6 with a formation rate of 155 μmol h-1, 7 times that of Au/SrTiO3 without SrTiO3 overlayers. The activity is improved to 1050 μmol h-1 with a C2+ selectivity of 94% by increasing Au@SrTiO3 loading to harvest more light. These figures of merits are comparable with the benchmarking photocatalysts for OCM by elucidating the chemistry of C-C coupling sites.

PMID:
42532955
Bibliographic data and abstract were imported from PubMed on 31 Jul 2026.

Read full publication at:
Please sign in to see all details.

Stats

1-terrible, 9-excellent. How would you rate this publication? Sign in in to submit your rating.

Post a comment

You need to be signed in to post comments. You can sign in here.

Comments

There are no comments yet.