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Dendritic Hematite Nanoarray Photoanode Modified with a Conformal Titanium Dioxide Interlayer for Effective Charge Collection.
- Source :
- Angewandte Chemie International Edition; 10/9/2017, Vol. 56 Issue 42, p12878-12882, 5p
- Publication Year :
- 2017
-
Abstract
- This paper describes the introduction of a thin titanium dioxide interlayer that serves as passivation layer and dopant source for hematite (α-Fe<subscript>2</subscript>O<subscript>3</subscript>) nanoarray photoanodes. This interlayer is demonstrated to boost the photocurrent by suppressing the substrate/hematite interfacial charge recombination, and to increase the electrical conductivity by enabling Ti<superscript>4+</superscript> incorporation. The dendritic nanostructure of this photoanode with an increased solid-liquid junction area further improves the surface charge collection efficiency, generating a photocurrent of about 2.5 mA cm<superscript>−2</superscript> at 1.23 V versus the reversible hydrogen electrode (vs. RHE) under air mass 1.5G illumination. A photocurrent of approximately 3.1 mA cm<superscript>−2</superscript> at 1.23 V vs. RHE could be achieved by addition of an iron oxide hydroxide cocatalyst. [ABSTRACT FROM AUTHOR]
- Subjects :
- HEMATITE
ANODES
TITANIUM dioxide
PASSIVATION
DOPING agents (Chemistry)
Subjects
Details
- Language :
- English
- ISSN :
- 14337851
- Volume :
- 56
- Issue :
- 42
- Database :
- Complementary Index
- Journal :
- Angewandte Chemie International Edition
- Publication Type :
- Academic Journal
- Accession number :
- 125483878
- Full Text :
- https://doi.org/10.1002/anie.201705772