Boosting Photocatalytic Hydrogen Production of a Metal-Organic Framework Decorated with Platinum Nanoparticles: The Platinum Location Matters.
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.
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.
Juan-Ding
JD
Xiao
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.
Qichao
Q
Shang
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.
Yujie
Y
Xiong
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.
Qun
Q
Zhang
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.
Yi
Y
Luo
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.
Shu-Hong
SH
Yu
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.
Hai-Long
0000-0002-2975-7977
HL
Jiang
Pt nanoparticles; hydrogen production; metal-organic frameworks; photocatalysis; ultrafast spectroscopy