Abstract
Monolayer HSr2Nb3O10 nanosheets with a thickness of about 1.95 nm were synthesized via a top-down approach. The structure and morphology were well characterized by XRD, SEM and TEM analyses. The sample served as an efficient photocatalyst for hydrogen evolution with the in situ growth of highly dispersed Pt clusters (about 2 nm). The photocatalytic hydrogen evolution rate of the Pt/HSr2Nb3O10 nanosheets was 530.2 μmol gcatalyst-1 h-1 under the optimal conditions of 1 wt% of Pt (PtCl4 as the precursor), triethanolamine (TEOA) as the sacrificial reagent and the aqueous solution pH = 10.7, which was about 2.2 times higher than that of the layered HSr2Nb3O10.
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