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- W4313490941 abstract "Cocatalyst plays a critical role in photocatalytic overall water splitting (POWS). However, the typical metal cocatalysts aimed at promoting hydrogen evolution are also highly active for H2-O2 recombination. Here we report a new strategic approach of coating single-layer graphene selectively on metal cocatalyst by chemical vapor deposition to effectively suppress the backward reaction for efficient POWS. Pt@C/SrTiO3 demonstrates steady POWS activity in contrast to the rapid activity decline by 65% in 5 h of Pt/SrTiO3, and no obvious H2 and O2 consumption is observed over Pt@C/SrTiO3 during dark reaction. Experimental and theoretical calculation results indicate that the graphene prevents O2 from contacting Pt and the O2 dissociation as the rate-determining step of backward reaction is retarded. Moreover, this method demonstrates good universality and similar suppressing effect is also achieved over Rh, Pd@C. These findings may open a new pathway for developing effective cocatalysts with suppressed backward reaction for efficient POWS." @default.
- W4313490941 created "2023-01-06" @default.
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- W4313490941 date "2023-05-01" @default.
- W4313490941 modified "2023-10-17" @default.
- W4313490941 title "Boosting photocatalytic overall water splitting over single-layer graphene coated metal cocatalyst" @default.
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- W4313490941 doi "https://doi.org/10.1016/j.apcatb.2023.122369" @default.
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