Back to Search
Start Over
Surviving High-Temperature Calcination: ZrO2-Induced Hematite Nanotubes for Photoelectrochemical Water Oxidation.
- Source :
- Angewandte Chemie International Edition; 4/3/2017, Vol. 56 Issue 15, p4150-4155, 6p
- Publication Year :
- 2017
-
Abstract
- Nanotubular Fe<subscript>2</subscript>O<subscript>3</subscript> is a promising photoanode material, and producing morphologies that withstand high-temperature calcination (HTC) is urgently needed to enhance the photoelectrochemical (PEC) performance. This work describes the design and fabrication of Fe<subscript>2</subscript>O<subscript>3</subscript> nanotube arrays that survive HTC for the first time. By introducing a ZrO<subscript>2</subscript> shell on hydrothermal FeOOH nanorods by atomic layer deposition, subsequent high-temperature solid-state reaction converts FeOOH-ZrO<subscript>2</subscript> nanorods to ZrO<subscript>2</subscript>-induced Fe<subscript>2</subscript>O<subscript>3</subscript> nanotubes (Zr-Fe<subscript>2</subscript>O<subscript>3</subscript> NTs). The structural evolution of the hematite nanotubes is systematically explored. As a result of the nanostructuring and shortened charge collection distance, the nanotube photoanode shows a greatly improved PEC water oxidation activity, exhibiting a photocurrent density of 1.5 mA cm<superscript>−2</superscript> at 1.23 V (vs. reversible hydrogen electrode, RHE), which is the highest among hematite nanotube photoanodes without co-catalysts. Furthermore, a Co-Pi decorated Zr-Fe<subscript>2</subscript>O<subscript>3</subscript> NT photoanode reveals an enhanced onset potential of 0.65 V (vs. RHE) and a photocurrent of 1.87 mA cm<superscript>−2</superscript> (at 1.23 V vs. RHE). [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 14337851
- Volume :
- 56
- Issue :
- 15
- Database :
- Complementary Index
- Journal :
- Angewandte Chemie International Edition
- Publication Type :
- Academic Journal
- Accession number :
- 122099825
- Full Text :
- https://doi.org/10.1002/anie.201611330