光催化
铂金
制氢
金属有机骨架
催化作用
光催化分解水
光致发光
铂纳米粒子
材料科学
纳米复合材料
光化学
纳米颗粒
化学工程
载流子
无机化学
纳米技术
分解水
氢
化学
光电子学
吸附
物理化学
有机化学
工程类
作者
Jiaying Xiao,Qianqian Shang,Yujie Xiong,Qun Zhang,Yi Luo,Shu‐Hong Yu,Hai‐Long Jiang
标识
DOI:10.1002/anie.201603990
摘要
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.
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