Elucidating Charge Separation Dynamics in a Hybrid Metal-Organic Framework Photocatalyst for Light-Driven H2 Evolution

作者：Yang, Sizhuo; Fan, Donghua; Hu, Wenhui; Pattengale, Brian; Liu, Cunming; Zhang, Xiaoyi; Huang, Jier^*

来源：Journal of Physical Chemistry C, 2018, 122(6): 3305-3311.

DOI：10.1021/acs.jpcc.8b00471

• POROUS COORDINATION POLYMERS
• CARBON-DIOXIDE REDUCTION
• VISIBLE-LIGHT
• HYDROGEN-PRODUCTION
• ENERGY-TRANSFER
• ARTIFICIAL PHOTOSYNTHESIS
• WATER
• CATALYST
• NANOCRYSTALS
• GENERATION

Metal organic frameworks (MOFs) have emerged as novel scaffolds for artificial photosynthesis due to their unique capability in incorporating homogeneous photosensitizer and catalyst to their robust heterogeneous matrix. In this work, we report the charge separation dynamics between molecular Ru-photosensitizer and Pt-catalyst, both of which were successfully incorporated into a Zr-MOF that demonstrates excellent activity and stability for light-driven H2 generation from water. Using optical transient absorption (OTA) spectroscopy, we show that charge separation in this hybrid MOF occurs via electron transfer (ET) from Ru-photosensitizer to Pt-catalyst. Using Pt L-3-edge X-ray transient absorption (XTA) spectroscopy, we observed the intermediate reduced Pt site, directly confirming the formation of charge separated state due to ET from Ru-photosensitizer and unraveling their key roles in photocatalysis.

• 出版日期2018-2-15
• 单位五邑大学