文献类型：期刊文献

英文题名：Engineered Hematite Mesoporous Single Crystals Drive Drastic Enhancement in Solar Water Splitting

作者：Wang, Chong Wu[1];Yang, Shuang[1];Fang, Wen Qi[1];Liu, Porun[2];Zhao, Huijun[2];Yang, Hua Gui[1]

机构：[1]E China Univ Sci & Technol, Sch Mat Sci & Engn, Minist Educ, Key Lab Ultrafine Mat, Shanghai 200237, Peoples R China;[2]Griffith Univ, Griffith Sch Environm, Ctr Clean Environm & Energy, Nathan, Qld 4222, Australia

年份：2016

卷号：16

期号：1

起止页码：427

外文期刊名：NANO LETTERS

收录：;EI(收录号：20160701938152);WOS:【SCI-EXPANDED(收录号:WOS:000368322700066)】；

基金：This work was financially supported by Program of Shanghai Subject Chief Scientist (15XD1501300), SRF for ROCS, SEM, and Programme for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning.

语种：英文

外文关键词：Mesoporous single crystals; hematite; hydrogen; photoanode; water splitting

摘要：Mesoporous single crystals (MSCs) rendering highly accessible surface area and long-range electron conductivity are extremely significant in many fields, including catalyst, solar fuel, and electrical energy storage technologies. Hematite semiconductor, whose performance has been crucially limited by its pristine poor charge separation efficiency in solar water splitting, should benefit from this strategy. Despite successful synthesis of many metal oxide MSCs, the fabrication of hematite MSCs remains to be a great challenge due to its quite slow hydrolysis rate in water. Herein, for the first time, we have developed a synthetic strategy to prepare hematite MSCs and systematically investigated their growth mechanism. The electrode fabricated with these crystals is able to achieve a photo current density of 0.61 mA/cm(2) at 1.23 V vs RHE under AM 1.5G simulated sunlight, which is 20 times higher than that of electrodes made of solid single crystals. The enhancement is ascribed to the superior light absorption and enhanced charges separation. Our results demonstrate the advantage of incorporation of nanopores into the large-sized hematite single crystals and provide a valuable insight for the development of high performance photoelectrodes in PEC application.