A novel strategy for loading metal cocatalysts onto hollow nano-TiO_(2)inner surface with highly enhanced H_(2)production activity  

作　　者：Nan Chen Yu Zhou Songtao Cao Ruixin Wang Weizhou Jiao 

机构地区：[1]School of Chemical Engineering and Technology,North University of China,Taiyuan,Shanxi,030051,China

出　　处：《Green Energy & Environment》2023年第2期509-518,共10页绿色能源与环境（英文版）

基　　金：supported by the Natural Science Foundation of the Shanxi Province of China(No.201801D121069);Graduate Education Innovation Foundation of Province Shanxi of China(No.2020SY359)。

摘　　要：The loading strategy of cocatalysts affects its activity exerting and atom utilization.Here,a novel strategy for loading precious metal(Pt)cocatalysts by means of ultrathin N-doped carbon layer is reported.The strategy is based on a pyrolysis process of predesigned N-containing polymers and Pt complexes on hard-template surface,during which Pt can be reduced by carbon from pyrolysis at high temperatures.Finally,the hollow TiO_(2)composite with stable and dispersed Pt on its inner surface was prepared.It shows an ultrahigh photocatalytic H_(2)production activity as high as 25.7 mmol h^(-1)g^(-1)with methanol as sacrificial regent,and displays an apparent quantum yield as 13.2%.The improved photocatalytic activity and stability can be attributed to the highly dispersed and ultrafine Pt nanoparticles,enhanced interaction between Pt-species and carbon support,fast photo-excited electron transport from the high graphitization degree of NC layers,ample oxygen vacancies/defects,as well as the manipulated local charge distribution of Pt/NC-layer configuration.Additionally,the universality of the proposed strategy was demonstrated by replacing metal sources(such as,Ru and Pd).This work presented a promising strategy for the design and development of novel photocatalysts,which shows a broad application prospect.

关 键 词：Ultrathin carbon layer Ultrafine Pt nanoparticles LOADING Hollow photocatalyst Photocatalytic hydrogen production 

分 类 号：O643.36[理学—物理化学] O644.1[理学—化学]