Boosting Photocatalytic Hydrogen Production of a Metal-Organic Framework Decorated with Platinum Nanoparticles: The Platinum Location Matters

Juan-Ding Xiao; Qichao Shang; Yujie Xiong; Qun Zhang; Yi Luo; Shu-Hong Yu; Hai-Long Jiang

doi:10.1002/anie.201603990

Boosting Photocatalytic Hydrogen Production of a Metal-Organic Framework Decorated with Platinum Nanoparticles: The Platinum Location Matters

Angew Chem Int Ed Engl. 2016 Aug 1;55(32):9389-93. doi: 10.1002/anie.201603990. Epub 2016 Jun 20.

Authors

Juan-Ding Xiao¹, Qichao Shang², Yujie Xiong¹, Qun Zhang³, Yi Luo², Shu-Hong Yu¹, Hai-Long Jiang⁴

Affiliations

¹ Hefei National Laboratory for Physical Sciences at the Microscale, CAS Key Laboratory of Soft Matter Chemistry, Collaborative Innovation Center of Suzhou Nano Science and Technology, Department of Chemistry, University of Science and Technology of China, Hefei, Anhui, 230026, P.R. China.
² Synergetic Innovation Center of Quantum Information and Quantum Physics, Department of Chemical Physics, Hefei Science Center of CAS, University of Science and Technology of China, Hefei, Anhui, 230026, P.R. China.
³ Synergetic Innovation Center of Quantum Information and Quantum Physics, Department of Chemical Physics, Hefei Science Center of CAS, University of Science and Technology of China, Hefei, Anhui, 230026, P.R. China. qunzh@ustc.edu.cn.
⁴ Hefei National Laboratory for Physical Sciences at the Microscale, CAS Key Laboratory of Soft Matter Chemistry, Collaborative Innovation Center of Suzhou Nano Science and Technology, Department of Chemistry, University of Science and Technology of China, Hefei, Anhui, 230026, P.R. China. jianglab@ustc.edu.cn.

PMID: 27321732
DOI: 10.1002/anie.201603990

Abstract

Improving the efficiency of electron-hole separation and charge-carrier utilization plays a central role in photocatalysis. Herein, Pt nanoparticles of ca. 3 nm are incorporated inside or supported on a representative metal-organic framework (MOF), UiO-66-NH2 , denoted as Pt@UiO-66-NH2 and Pt/UiO-66-NH2 , respectively, for photocatalytic hydrogen production via water splitting. Compared with the pristine MOF, both Pt-decorated MOF nanocomposites exhibit significantly improved yet distinctly different hydrogen-production activities, highlighting that the photocatalytic efficiency strongly correlates with the Pt location relative to the MOF. The Pt@UiO-66-NH2 greatly shortens the electron-transport distance, which favors the electron-hole separation and thereby yields much higher efficiency than Pt/UiO-66-NH2 . The involved mechanism has been further unveiled by means of ultrafast transient absorption and photoluminescence spectroscopy.

Keywords: Pt nanoparticles; hydrogen production; metal-organic frameworks; photocatalysis; ultrafast spectroscopy.

Publication types

Research Support, Non-U.S. Gov't