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Dendritic Hematite Nanoarray Photoanode Modified by Conformal Titanium Dioxide Interlayer for Effective Charge Collection

This paper describes the introduction of a thin titanium dioxide interlayer that serves as passivation layer and dopant source for hematite (α‐Fe2O3) nanoarray photoanode. This interlayer is demonstrated to boost the photocurrent by suppressing the substrate/hematite interfacial charge recombination, and increase the electrical conductivity by enabling Ti4+ incorporation. A dendritic nanostructure of this photoanode with enhanced solid‐liquid junction area further improves to the surface charge collection efficiency, generating a photocurrent of ~2.5 mA cm‐2 at 1.23 V versus reversible hydrogen electrode (vs. RHE) under air mass 1.5G illumination. A photocurrent of ~3.1 mA cm‐2 at 1.23 V vs. RHE could be achieved by loading hydroxyl‐ferric oxide cocatalyst.

Authors:   Jinlong Gong, Zhibin Luo, Tuo Wang, Jijie Zhang, Chengcheng Li, Huimin Li
Journal:   Angewandte Chemie International Edition
Year:   2017
Pages:   n/a
DOI:   10.1002/anie.201705772
Publication date:   25-Jul-2017
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