IOCAS-IR  > 海洋环境腐蚀与与生物污损重点实验室
Significantly enhanced photoelectrochemical cathodic protection performance of hydrogen treated Cr-doped SrTiO3 by Cr6+ reduction and oxygen vacancy modification
Jing, Jiangping1,3,5; Chen, Zhuoyuan1,3,5; Bu, Yuyu2; Sun, Mengmeng1,5; Zheng, Wenqiang4; Li, Weibing4
2019-05-01
Source PublicationELECTROCHIMICA ACTA
ISSN0013-4686
Volume304Pages:386-395
Corresponding AuthorChen, Zhuoyuan(zychen@qdio.ac.cn) ; Bu, Yuyu(yybu@xidian.edu.cn)
AbstractSrTiO3 is a promising material for the photoelectrochemical (PEC) cathodic protection technology due to its intrinsic band structure. Its disadvantage of light absorption only in the ultraviolet region can be effectively solved by Cr doping. The Cr dopant usually exists as two states of Cr3+ and Cr6+, among which the latter one usually behaves as the trapping center for the photoinduced electrons and leads to the decrease of the PEC performance. In this paper, a hydrogen treatment process is performed on the Cr-doped SrTiO3 to reduce the Cr6+. It is verified that hydrogen treatment reduces Cr6+ to Cr3+, leading to the increase of the concentration of the charge carriers and the decrease of the charge transfer resistance. And also, hydrogen treatment induces the formation of oxygen vacancy, which leads to the negative shift of conduction band potential and the increase of the concentration of the charge carriers. The effect of the hydrogen treatment temperature is further studied in this work. Higher temperature will promote the reduction degree of Cr6+ and increase the concentration of oxygen vacancy. However, hydrogen treatment with excessively high temperature will induce too high concentration of oxygen vacancy, which would act as the recombination centers of the photogenerated charge carriers, suppress the mobility conduction and thus lead to the decrease of the PEC performance. Therefore, benefiting from the Cr6+ reduction and modification with appropriate concentration of oxygen vacancy, the Cr-doped SrTiO3 with hydrogen treatment at 250 degrees C shows the optimal PEC cathodic protection performance in NaCl solution. (C) 2019 Elsevier Ltd. All rights reserved.
KeywordCr doped-SrTiO3 Hydrogen treatment Photoelectrochemical cathodic protection Cr6+ reduction Oxygen vacancy
DOI10.1016/j.electacta.2019.03.020
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[41506093] ; National Natural Science Foundation of China[41676069] ; Qingdao Innovative Leading Talent Foundation[15-10-3-15-(39)-zch] ; Qingdao Science and Technology Achievement Transformation Guidance Plan (Applied Basic Research)[14-2-4-4-jch] ; State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute, China[614290101011703]
WOS Research AreaElectrochemistry
WOS SubjectElectrochemistry
WOS IDWOS:000461909000042
PublisherPERGAMON-ELSEVIER SCIENCE LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.qdio.ac.cn/handle/337002/154959
Collection海洋环境腐蚀与与生物污损重点实验室
Corresponding AuthorChen, Zhuoyuan; Bu, Yuyu
Affiliation1.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Environm Corros & Biofouling, 7 Nanhai Rd, Qingdao 266071, Peoples R China
2.Xidian Univ, Sch Microelect, Key Lab Wide Band Gap Semicond Mat & Devices, Xian, Peoples R China
3.Luoyang Ship Mat Res Inst, State Key Lab Marine Corros & Protect, Wenhai Rd, Qingdao 266237, Peoples R China
4.Qingdao Univ Sci & Technol, Sch Environm & Safety Engn, 53 Zhengzhou Rd, Qingdao 266042, Peoples R China
5.Chinese Acad Sci, Ctr Ocean Megasci, 7 Nanhai Rd, Qingdao 266071, Peoples R China
First Author AffilicationInstitute of Oceanology, Chinese Academy of Sciences
Corresponding Author AffilicationInstitute of Oceanology, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Jing, Jiangping,Chen, Zhuoyuan,Bu, Yuyu,et al. Significantly enhanced photoelectrochemical cathodic protection performance of hydrogen treated Cr-doped SrTiO3 by Cr6+ reduction and oxygen vacancy modification[J]. ELECTROCHIMICA ACTA,2019,304:386-395.
APA Jing, Jiangping,Chen, Zhuoyuan,Bu, Yuyu,Sun, Mengmeng,Zheng, Wenqiang,&Li, Weibing.(2019).Significantly enhanced photoelectrochemical cathodic protection performance of hydrogen treated Cr-doped SrTiO3 by Cr6+ reduction and oxygen vacancy modification.ELECTROCHIMICA ACTA,304,386-395.
MLA Jing, Jiangping,et al."Significantly enhanced photoelectrochemical cathodic protection performance of hydrogen treated Cr-doped SrTiO3 by Cr6+ reduction and oxygen vacancy modification".ELECTROCHIMICA ACTA 304(2019):386-395.
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