Enhanced charge separation and transfer through Fe₂O₃/ITO nanowire arrays wrapped with reduced graphene oxide for water-splitting

详细信息    查看全文

• 作者：Zemin ZhangAuthor Vitae ; Caitian GaoAuthor Vitae ; Yunxia LiAuthor Vitae ; Weihua Han ; ^{hanwh@lzu.edu.cn}Author Vitae ; Wenbin FuAuthor Vitae ; Yongmin HeAuthor Vitae ; Erqing Xie ; ^{xieeq@lzu.edu.cn}Author Vitae
• 关键词：Photoelectrochemical water splitting ; Reduced graphene oxide ; Core-shell structure ; ITO nanowire arrays ; Fe2O3 nanorods
• 刊名：Nano Energy
• 出版年：2016
• 出版时间：December 2016
• 年：2016
• 卷：30
• 期：Complete
• 页码：892-899
• 全文大小：2012 K
• 卷排序：30

文摘

This work reports the synthesis and investigation of reduced graphene oxide (rGO)-wrapped ITO@Fe2O3 (rGO-ITO@Fe2O3) core-shell nanowire arrays for water splitting, in which Fe2O3 nanorods are primary light-absorber, ITO nanowires act as high speed electron conductor and rGO as highly active electrocatalyst. This design considerably reduced the charge transfer and injection resistance, thus decreasing the recombination and improving the oxygen reaction kinetics. As a result, the rGO-ITO@Fe2O3 photoanode yields a photocurrent up to 5.38 mA cm−2 at 0.6 V (versus SCE), which is 3.5 times and 10 times of ITO@Fe2O3 and Fe2O3 in the same situation. The rGO-ITO@Fe2O3 photoanode also exhibits an excellent photoelectrochemical stability and there is no obvious degradation after 60 min. Our work has provided an efficient strategy to improve the energy conversion efficiency and life-time of water splitting materials.