Nanostructural characterization of mesoporous hematite thin film photoanode used for water splitting

被引：0
作者：
Ricardo H. Goncalves
Edson R. Leite
机构：
[1] Federal University of Sao Carlos,Department of Chemistry
来源：
Journal of Materials Research | 2014年 / 29卷
关键词：
D O I：
暂无
中图分类号：
学科分类号：
摘要：
By combining high-resolution transmission electron microscopy and scanning transmission electron microscopy with analytical capability, we investigated the nanostructure of a textured hematite photoanode with columnar grains obtained by the colloidal deposition of magnetite nanocrystals. This initial report describes in detail the structure and chemistry of the α-Fe2O3/SnO2:F interface by identifying semicoherent and incoherent interfaces as well as a localized interdiffusion layer of Sn and Fe at the interface (∼100 nm in length). Our study indicates that unintentional doping by tin at a high sintering temperature is not significant in enhancing hematite photoanode performance for water oxidation. The correlation of nanoscale morphology with photoelectrochemical characterization facilitated the identification of the beneficial effect of a preferential growth direction of a hematite film along the [110] axis for water-splitting efficiency.
引用
收藏
页码：47 / 54
页数：7
相关论文
共 113 条
  • [1] Dare-Edwards MP(1983)Electrochemistry and photoelectrochemistry of iron(III) oxide J. Chem. Soc., Faraday Trans. 79 2027-2041
  • [2] Goodenough JB(1984)Stacked thin-film photoelectrode using thin-film photoelectrochemistry–iron-oxide J. Electrochem. Soc. 131 1266-863
  • [3] Hamnett A(1994)Photoelectrochemical studies on nanocrystalline hematite films Chem. Mater. 6 858-2017
  • [4] Trevellick PR(2006)Efficiency of solar water splitting using semiconductor electrodes Int. J.Hydrogen Energy 31 1999-6473
  • [5] Itoh K(1978)Photooxidation of water at α-Fe Electrochem. Soc. 125 709-449
  • [6] Bockris JO(1951)O Phys. Rev. 83 1005-5
  • [7] Bjorkstbn U(2010) electrodes Chem. Rev. 110 6446-2401
  • [8] Moser J(2011)Electrical properties of alpha-Fe Chem. Sus. Chem. 4 432-1107
  • [9] Gratzel M(2010)O Angew. Chem. Int. Ed. 49 1-468
  • [10] Murphy AB(2011) and alpha Fe J. Am. Chem. Soc. 133 2398-12395
12345678910