教師資料查詢 | 類別: 期刊論文 | 教師: 董崇禮 CHUNG-LI DONG (瀏覽個人網頁)

標題: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
語言英文
ISSN2367-198X
期刊性質國內
收錄於SCI;
產學合作
通訊作者
審稿制度
國別德國
公開徵稿
出版型式,電子版
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