Electrochemically Hydrogenated TiO2 Nanotubes with Improved Photoelectrochemical Water Splitting Performance
Overview
Authors
Affiliations
One-dimensional anodic titanium oxide (ATO) nanotube arrays hold great potential as photoanode for photoelectrochemical (PEC) water splitting. In this work, we report a facile and eco-friendly electrochemical hydrogenation method to modify the electronic and PEC properties of ATO nanotube films. The hydrogenated ATO (ATO-H) electrodes present a significantly improved photocurrent of 0.65 mA/cm2 in comparison with that of pristine ATO nanotubes (0.29 mA/cm2) recorded under air mass 1.5 global illumination. The incident photon-to-current efficiency measurement suggests that the enhanced photocurrent of ATO-H nanotubes is mainly ascribed to the improved photoactivity in the UV region. We propose that the electrochemical hydrogenation induced surface oxygen vacancies contribute to the substantially enhanced electrical conductivity and photoactivity.
Jamil S, Jabeen N, Sajid F, Khan L, Kanwal A, Sohail M RSC Adv. 2024; 14(33):24092-24104.
PMID: 39091372 PMC: 11292792. DOI: 10.1039/d4ra03402c.
Paul S, Rahman M, Sharif S, Kim J, Siddiqui S, Hossain M Nanomaterials (Basel). 2022; 12(12).
PMID: 35745373 PMC: 9228895. DOI: 10.3390/nano12122034.
Sabinas-Hernandez S, Gracia Jimenez J, Silva Gonzalez N, Elizalde-Gonzalez M, Salazar-Kuri U, Tehuacanero-Cuapa S Nanomaterials (Basel). 2022; 12(9).
PMID: 35564210 PMC: 9104741. DOI: 10.3390/nano12091501.
Black 3D-TiO Nanotube Arrays on Ti Meshes for Boosted Photoelectrochemical Water Splitting.
Meng M, Feng Y, Li C, Gan Z, Yuan H, Zhang H Nanomaterials (Basel). 2022; 12(9).
PMID: 35564156 PMC: 9104132. DOI: 10.3390/nano12091447.
Black Si-doped TiO nanotube photoanode for high-efficiency photoelectrochemical water splitting.
Dong Z, Ding D, Li T, Ning C RSC Adv. 2022; 8(11):5652-5660.
PMID: 35539613 PMC: 9078178. DOI: 10.1039/c8ra00021b.