Kim, Do Hong Andoshe, Dinsefa M. Shim, Young-Seok Moon, Cheon-Woo Sohn, Woonbae Choi, Seokhoon Kim, Taemin Ludvic Lee, Migyoung Park, Hoonkee Hong, Kootak Kwon, Ki Chang Suh, Jun Min Kim, Jin-Sang Lee, Jong-Heun Jang, Ho Won 2024-01-20T03:31:49Z 2024-01-20T03:31:49Z 2022-01-25 2016-09 1944-8244 https://pubs.kist.re.kr/handle/201004/123694 Vertically ordered hematite nanotubes are considered to be promising photoactive materials for high-performance water-splitting photoanodes. However, the synthesis of hematite nanotubes directly on conducting substrates such as fluorine-doped tin oxide (FTO)/glass is difficult to be achieved because of the poor adhesion between hematite nanotubes and FTO/glass. Here, we report the synthesis of hematite nanotubes directly on FTO/glass substrate and high-performance photoelectrochemical properties of the nanotubes with NiFe cocatalysts. The hematite nanotubes are synthesized by a simple electrochemical anodization method. The adhesion of the hematite nanotubes to the FTO/glass substrate is drastically improved by dipping them in nonpolar cyclohexane prior to postannealing. Bare hematite nanotubes show a photocurrent density of 1.3 mA/cm(2) at 1.23 V vs a reversible hydrogen electrode, while hematite nanotubes with electrodeposited NiFe cocatalysts exhibit 2.1 mA/cm(2) at 1.23 V which is the highest photocurrent density reported for hematite nanotubes-based photoanodes for solar water splitting. Our work provides an efficient platform to obtain high-performance water-splitting photoanodes utilizing earth-abundant hematite and noble-metal-free cocatalysts. English American Chemical Society Toward High-Performance Hematite Nanotube Photoanodes: Charge-Transfer Engineering at Heterointerfaces Article 10.1021/acsami.6b05366 1 ACS Applied Materials & Interfaces, v.8, no.36, pp.23793 - 23800 ACS Applied Materials & Interfaces 8 36 23793 23800 N scie scopus 000383412000039 2-s2.0-84987866430 Nanoscience & Nanotechnology Materials Science, Multidisciplinary Science & Technology - Other Topics Materials Science Article ALPHA-FE2O3 PHOTOELECTRODES WATER OXIDATION NICKEL-IRON NANORODS ARRAYS ELECTRODEPOSITION PHOTOLYSIS EFFICIENCY SUBSTRATE CATALYSTS water-splitting photoanode hematite nanotube NiFe cocatalysts earth abundant