Cathodic shift of onset potential on TiO_(2)nanorod arrays with significantly enhanced visible light photoactivity via nitrogen/cobalt co-implantation  

作　　者：Xianyin Song Hongtao Zhou Changzhong Jiang 宋先印;周洪涛;蒋昌忠(College of Materials Science and Engineering,Hunan University,Changsha 410082,China)

机构地区：[1]College of Materials Science and Engineering,Hunan University,Changsha 410082,China

出　　处：《Chinese Physics B》2021年第5期114-119,共6页中国物理B（英文版）

基　　金：the National Natural Science Foundation of China(Grant No.11875211);the Major Science and Technology Program of Changsha,China(Grant No.kq1902046);the Fundamental Research Funds for the Central Universities,China.

摘　　要：Despite anionic doping has been widely implemented to increase the visible light activity of TiO_(2),it often gives rise to a dramatical anodic shift in current onset potential.Herein,we show an effective method to achieve the huge cathodic shift of TiO_(2) photoanode with significantly enhanced visible light photo-electrochemical activity by nitrogen/cobalt coimplantation.The nitrogen/cobalt co-doped TiO_(2)nanorod arrays(N/Co-TiO_(2))exhibit a cathodic shift of 350 mV in onset potential relative to only nitrogen-doped TiO_(2)(N-TiO_(2)).Moreover,the visible-light(λ>420 nm)photocurrent density of N/Co-TiO_(2) reaches 0.46 mA/cm^(2),far exceeding 0.07 mA/cm^(2) in N-TiO_(2)at 1.23 V versus reversible hydrogen electrode(RHE).Systematic characterization studies demonstrate that the enhanced photo-electrochemical performance can be attributed to the surface synergic sputtering of high-energy nitrogen/cobalt ions.

关 键 词：ion implantation TiO_(2) surface sputtering photo-electrochemical water splitting 

分 类 号：TQ134.11[化学工程—无机化工] TB383.1[一般工业技术—材料科学与工程]