biostudies-literaturePan YFundamental Research Funds for the Central UniversitiesChinese Academy of SciencesNational Natural Science Foundation of Chinanwaa224https://www.ebi.ac.uk/biostudies/studies/S-EPMC8288370biostudies-literatureUnknown8(1)While the surface charge state of co-catalysts plays a critical role for boosting photocatalysis, studies on surface charge regulation via their precise structure control remain extremely rare. Herein, metal-organic framework (MOF) stabilized bimetallic Pd@Pt nanoparticles, which feature adjustable Pt coordination environment and a controlled structure from core-shell to single-atom alloy (SAA), have been fabricated. Significantly, apart from the formation of a Mott-Schottky junction in a conventional way, we elucidate that Pt surface charge regulation can be alternatively achieved by changing its coordination environment and the structure of the Pd@Pt co-catalyst, where the charge between Pd and Pt is redistributed. As a result, the optimized Pd₁₀@Pt₁/MOF composite, which involves an unprecedented SAA co-catalyst, exhibits exceptionally high photocatalytic hydrogen production activity, far surpassing its corresponding counterparts.National science reviewPrecise fabrication of single-atom alloy co-catalyst with optimal charge state for enhanced photocatalysis.PMC8288370216732132187124421725101Jiang HLYu SHPan YQian YZheng XYang YDing CWang XChu SQfalsePrecise fabrication of single-atom alloy co-catalyst with optimal charge state for enhanced photocatalysis.While the surface charge state of co-catalysts plays a critical role for boosting photocatalysis, studies on surface charge regulation via their precise structure control remain extremely rare. Herein, metal-organic framework (MOF) stabilized bimetallic Pd@Pt nanoparticles, which feature adjustable Pt coordination environment and a controlled structure from core-shell to single-atom alloy (SAA), have been fabricated. Significantly, apart from the formation of a Mott-Schottky junction in a conventional way, we elucidate that Pt surface charge regulation can be alternatively achieved by changing its coordination environment and the structure of the Pd@Pt co-catalyst, where the charge between Pd and Pt is redistributed. As a result, the optimized Pd₁₀@Pt₁/MOF composite, which involves an unprecedented SAA co-catalyst, exhibits exceptionally high photocatalytic hydrogen production activity, far surpassing its corresponding counterparts.2021-01-01T00:00:00Z2021 Jan2024-10-18T18:47:26.214Z2024-10-18T18:47:26.214ZS-EPMC82883703469156110.1093/nsr/nwaa224