Abstract
? 2022 Elsevier B.V.In order to improve the thermal stability of anodized TiO2 nanotube arrays, this paper proposed to fabricate the hybrid TiNb oxide nanotube arrays (TiNb ONA) on β-phase TiNb alloy plates by anodic oxidation. Then, TiNb ONA precursors were transformed into conductive nitride nanotube arrays (TiNb NNA) by nitridation at 800 °C. Introducing Nb contributes to the higher structural stability and easier nitridation of TiNb ONA compared with TiO2 nanotube arrays. After that, the spinel CuFe2O4 and nanosized Re-Ni alloy were respectively loaded on TiNb ONA and TiNb NNA to form CuFe2O4/TiNb ONA and Re-Ni/ TiNb NNA composite electrodes, and their performances in the photoelectrochemical reduction of CO2 and hydrogen evolution reactions were assessed respectively. Results showed that the well-maintained TiNb ONA improved the photo-response performance of the thermally-synthesized CuFe2O4, and TiNb NNA support also boosted the hydrogen evolution reaction because of the conductivity and catalytic activity of TiNb nitrides.
NSTL
Elsevier