Boosting photocatalytic hydrogen peroxide production by plasmonic Ag decorated perovskite-type BaSnO3

[Display omitted] •Plasmonic Ag was anchored on perovskite-type BaSnO3.•Ag-BaSnO3 exhibited five-fold H2O2 formation rate higher than that of BaSnO3.•The modification of Ag can effectively promote separation efficiency of carriers and the water oxidation. Rational design of photocatalyst to regulate the electronic structure and two-electron oxygen reduction reaction is very crucial to promote the photocatalytic H2O2 production. Herein, we developed a silver (Ag) with d10 electronic configuration anchored onto the perovskite-type BaSnO3 photocatalyst for the artificial photosynthesis of H2O2. The Ag/BaSnO3 demonstrated a H2O2 formation rate of 248.9 μmol g-1h−1, which is 6.08 times as high as that of bare BaSnO3. The enhanced photocatalytic activity was ascribed to the formation of schottky barrier, which can effectively promote the separation efficiency of photoinduced carriers. Moreover, the ability of water oxidation has also been strengthened and more oxygen and hydroxyl radical can be produced, which acts as precursors to participate in the synthesis of H2O2. This study offers a promising approach for the rational design of photocatalyst for photocatalytic H2O2 production.