Strategic Surface Modification of TiO₂ nanorods by WO₃ and TiCl₄ for the Enhancement in Oxygen Evolution Reaction

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• 作者：Xiaoniu Peng^a ; Chao He^a ; Qingyun Liu^a ; Xina Wang^a ; Hanbin Wang^a ; Yingjun Zhang^a ; Qingcui Ma^a ; Kun Zhang^b ; Yibo Han^b ; Hao Wang^a ; ^{nanoguy@126.com}
• 关键词：water splitting ; surface modification ; TiO2 nanorods ; charge utilization efficiency ; active surface area
• 刊名：Electrochimica Acta
• 出版年：2016
• 出版时间：20 December 2016
• 年：2016
• 卷：222
• 期：Complete
• 页码：1112-1119
• 全文大小：3056 K
• 卷排序：222

文摘

The titanium dioxide (TiO2) is the typical durable and lowcost but poor efficiency catalysts for the oxygen evolution reaction (OER) in the water splitting. In this study, the TiO2 nanorods were strategically modified by the WO3 and TiCl4 from the aspects of the charge utilization efficiency and the active surface area for improving photoelectrochemical water oxidation performance. Comparing with that of the pristine TiO2, the photocatalytic activity for the oxygen evolution was obviously enhanced after depositing the WO3 layer, attributing to the efficient separation and the restrained recombination of the photogenerated charges. The further optimization was achieved through the surface modification with TiCl4 to extend the active surface area, leading to significant enhancement of the oxidation performance with ∼211.9 enhancement factor. These intriguing results expand the comprehensive understanding of the photoinduced charges transfer in the TiO2 heteronanostructure and give a better manipulation of their applications in the solar nanodevices of the energy conversion.