Roles of various Ni species on TiO2 in enhancing photocatalytic H2 evolution  

作　　者：Xiaoping CHEN Jihai XIONG Jinming SHI Song XIA Shuanglin GUI Wenfeng SHANGGUAN 

机构地区：[1]Institute of Energy Research,Jiangxi Academy of Sciences,Nanchang 330096,China [2]Research Center for Combustion and Environment Technology Shanghai Jiao Tong University,Shanghai 200240,China

出　　处：《Frontiers in Energy》2019年第4期684-690,共7页能源前沿（英文版）

基　　金：the National Natural Science Foundation of China(Grant Nos.21773153 and 31700311);the Collaborative Innovation Project of Jiangxi Academy of Sciences(2017-XTPH1-05);the Post-Doctoral Project of Jiangxi Academy of Sciences.

摘　　要：Low-cost nickels can be used as cocatalyst to improve the performance of photocatalysts,which may be promising materials applied in the field of photocatalytic water splitting.In this study,different nickel species Ni,Ni(OH)2,NiO,NiOx,and NiS are used to modified titanium dioxide(P25)to investigate their roles on the photocatalytic hydrogen evolution activities.UV-visible,X-ray diffraction(XRD),Brunner-Emmet-Teller(BET)measurements,transmission electron microscopy(TEM),X-ray photoelectron spectroscopy(XPS)analysis etc.are employed to characterize the physical and chemical properties of catalysts.The results indicate that all the nickel species can improve the photocatalytic hydrogen production activity of P25.The P25 modified with NiOx and NiS has more superior photocatalytic hydrogen evolution activities than those modified with other nickel species.The reason for this is that NiOx and NiS can form p-n junctions with P25 respectively.In addition,NiOx can be selectively deposited on the active sites of P25 via in situ the photodeposition method and NiS is beneficial for H+reacting with photo-excited electrons.

关 键 词：nickel species TI02 photocatalytic hydrogen evolution 

分 类 号：O64[理学—物理化学]