Enhancing solar-driven water splitting with surface-engineered nanostructures
學年 107
學期 2
出版(發表)日期 2019-02-01
作品名稱 Enhancing solar-driven water splitting with surface-engineered nanostructures
作品名稱(其他語言)
著者 S. Shen; S. A. Lindley; C. L. Dong; E. Chen; Y. R. Lu; J. Zhou; Y. Hu; D. A. Wheeler; P. Guo; J. Zhang; D. S. Kliger; S. S. Mao
單位
出版者
著錄名稱、卷期、頁數 Solar RRL 3(3), 1800285
摘要 Functional nanoscale interfaces that promote the transport of photoexcited charge carriers are fundamental to efficient hydrogen production during photoelectrochemical (PEC) splitting of water. Here, the realization of a functional one‐dimensional nanostructure achieved through surface engineering of hematite (α‐Fe2O3) nanorods with a TiO2 overlayer is reported. The surface‐engineered hematite nanostructure exhibits significantly improved PEC performance as compared to untreated α‐Fe2O3, with an increase in the maximum incident photon‐to‐current efficiency (IPCE) of nearly 400% at 350 nm. While addition of the TiO2 overlayer did not alter the lifetime of photoexcited charge carriers, as evidenced from transient absorption spectroscopy, it is found that the presence of TiO2 could enhance oxygen electrocatalysis by interfacial electron enrichment, largely attributed to enhanced O(2p )−Fe(3d ) hybridization. Moreover, the interfacial electronic structure revealed from XANES measurements of the α‐Fe2O3/TiO2 nanorods suggests that photoexcited holes in α‐Fe2O3 may efficiently transfer through the TiO2 overlayer to the electrolyte while electrons migrate to the external circuit along the one‐dimensional nanorods, thereby promoting charge separation and enhancing PEC splitting of water.
關鍵字
語言 en
ISSN 2367-198X
期刊性質 國內
收錄於 SCI
產學合作
通訊作者
審稿制度
國別 DEU
公開徵稿
出版型式 ,電子版
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機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/118697 )