4.7 Article

Antenna Effect in BODIPY-(Zn)Porphyrin Entities Promotes H2 Evolution in Dye-Sensitized Photocatalytic Systems

期刊

ACS APPLIED ENERGY MATERIALS
卷 4, 期 9, 页码 10042-10049

出版社

AMER CHEMICAL SOC
DOI: 10.1021/acsaem.1c01975

关键词

antenna effect; photocatalytic hydrogen production; dye-sensitized photocatalytic systems (DSPs); porphyrin; BODIPY; axial coordination; covalent attachment

资金

  1. General Secretariat for Research and Technology (GSRT)
  2. Hellenic Foundation for Research and Innovation (HFRI) [508]
  3. European Union
  4. Greek national funds through the Operational Program Competitiveness, Entrepreneurship, and Innovation, under the call RESEARCH-CREATE-INNOVATE [T1EDK-01504]
  5. Greek national funds through the Regional Operational Program Crete 2014-2020 [OPS:5029187]
  6. European Commission's Seventh Framework Program (FP7/2007-2013) [229927]
  7. University of Crete
  8. Region des Pays de la Loire

向作者/读者索取更多资源

This study utilizes BODIPY-(Zn)Porphyrin hybrids as photosensitizers for photocatalytic hydrogen production from water, comparing the impact of different connectivity on catalytic activity. Covalently connected dyad BDP-Por demonstrated higher catalytic activity compared to axially coordinated BDP(Im)-Por, with the introduction of an additional BDP(Im) moiety leading to further enhanced performance in dye-sensitized photocatalytic systems.
In this study, we report the utilization of BODIPY-(Zn)Porphyrin hybrids in photocatalytic H-2 production from water. These entities were applied as photosensitizers upon their chemisorption onto the surface of platinum-doped titanium dioxide nanoparticles (Pt-TiO2), which acted as photocatalysts. To evaluate the impact of the different connectivity between the chromophores in photocatalytic in H-2 evolution, we employed two diverse BODIPY-(Zn)Porphyrin entities, in which the BODIPY moiety is either covalently attached (BDP-Por) or axially coordinated (BDP(Im)-Por) with the (Zn)Porphyrin. The covalently connected dyad (BDP-Por) presented higher catalytic activity (17 500 TONs) compared to the axial coordinated (BDP(Im)-Por, 13 700 TONs). In BDP-Por dyad, an additional BDP(Im) moiety was introduced and the formed hybrid (BDP-Por-BDP(Im)) outperformed the aforementioned systems, due to the enhanced light harvesting ability. Overall, we developed highly efficient dye-sensitized photocatalytic systems (DSPs) based on noble-metal-free photosensitizers reaching 18 600 turnover numbers (TONs) and 225 mmol(H-2) g(cat)(-1) h(-1).

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