X-Shaped α-FeOOH with Enhanced Performance in Visible-Light-Driven Photocatalytic Water Splitting
Invited conference paper presented and published in conference proceedings


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摘要Photocatalytic water splitting (PWS) is a promising technology for converting solar energy into clean and sustainable energy. In this talk, a simple hydrothermal approach was used to fabricate X-shaped -FeOOH catalyst with high-index facets. The X-shaped -FeOOH exhibited much better visible-light-driven (VLD)-PWS performance than that of its counter-part without X-structure, with a maximum H2 and O2 evolution rate of 9.2 and 4.7 mmol h-1 g-1, respectively. The morphology and particle size of the -FeOOH could be controlled by adjusting the NH4F concentration in the synthesis. The photodeposition of Pt and RuO2 on the X-shaped -FeOOH indicated that there were separated reduction and oxidation centers on the surface of -FeOOH, with the oxidation-active sites selectively located on the edges of the -FeOOH X-structures. Electrochemical analyses further supported there was enhanced charge separation in the X-shaped -FeOOH. The smaller particle size and unique X-shape of the -FeOOH significantly enhanced its VLD-PWS performance due to (i) large specific surface area, (ii) high proportion of exposed high-index facets, (iii) high electron-transfer efficiency, and (iv) effective separation of the photogenerated electron-hole pairs. These results indicated that the X-shaped -FeOOH could be used as a cost-effective and stable catalyst for VLD-PWS.
著者Wang Tianqi, Jiang Zhifeng, Wong Po Keung
會議名稱International Conference on Energy and Environmental Materials (ICEEM 2018)
會議開始日30.07.2018
會議完結日02.08.2018
會議地點Hefei
會議國家/地區中國
會議論文集題名International Conference on Energy and Environmental Materials
出版年份2018
月份7
日期30
出版社Institute of Solid State Physics, Chinese Academy of Science
出版地Hefei
頁次1 - 1
語言美式英語
關鍵詞X-shaped alpha-FeOOH, Visible-light-driven photocatalysis, Water splitting

上次更新時間 2018-07-11 於 12:04