Interfacial Microenvironment Modulation Boosting Electron Transfer between Metal Nanoparticles and MOFs for Enhanced Photocatalysis

Mingliang Xu; Dandan Li; Kang Sun; Long Jiao; Chenfan Xie; Chunmei Ding; Hai-Long Jiang

doi:10.1002/anie.202104219

Interfacial Microenvironment Modulation Boosting Electron Transfer between Metal Nanoparticles and MOFs for Enhanced Photocatalysis

Angew Chem Int Ed Engl. 2021 Jul 19;60(30):16372-16376. doi: 10.1002/anie.202104219. Epub 2021 Jun 24.

Authors

Mingliang Xu¹, Dandan Li², Kang Sun¹, Long Jiao¹, Chenfan Xie¹, Chunmei Ding³, Hai-Long Jiang¹

Affiliations

¹ Hefei National Laboratory for Physical Sciences at the Microscale, CAS Key Laboratory of Soft Matter Chemistry, Department of Chemistry, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China.
² Institute of Physical Science and Information Technology, Anhui University, Hefei, Anhui, 230601, P. R. China.
³ Dalian National Laboratory for Clean Energy, State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Liaoning, 116023, P. R. China.

PMID: 33988897
DOI: 10.1002/anie.202104219

Abstract

Interfacial electron transfer between cocatalyst and photosensitizer is key in heterogeneous photocatalysis, yet the underlying mechanism remains subtle and unclear. Surfactant coated on the metal cocatalysts, greatly modulating the microenvironment of catalytic sites, is largely ignored. Herein, a series of Pt co-catalysts with modulated microenvironments, including polyvinylpyrrolidone (PVP) capped Pt nanoparticles (denoted as Pt_PVP ), Pt with partially removed PVP (Pt_rPVP ), and clean Pt without PVP (Pt), were encapsulated into a metal-organic framework (MOF), UiO-66-NH₂ , to afford Pt_PVP @UiO-66-NH₂ , Pt_rPVP @UiO-66-NH₂ , and Pt@UiO-66-NH₂ , respectively, for photocatalytic hydrogen production. The PVP appears to have a negative influence on the interfacial electron transfer between Pt and the MOF. Compared with Pt_PVP @UiO-66-NH₂ , the removal of interfacial PVP improves the sluggish kinetics of electron transfer, boosting photocatalytic hydrogen production.

Keywords: hydrogen production; interfacial electron transfer; metal-organic frameworks; microenvironment modulation; photocatalysis.

Abstract

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