Solar-driven　oxidative　coupling　of　methane　is　a　promising　approach　to　synthesize　important　C2+　products,　yet　poor　efficiency　limits　its　application.　Now,　a　TiO2　membrane　loaded　with　Au　nanoclusters,　which　act　as　hole　acceptors　and　catalytic　centres,　achieves　high　yield　and　selectivity　in　C2+　production.