Abstract
An advanced trifunctional electrocatalyst based on a series of composites composed of TiO2-encapsulated carbon-nitride (CNx) (denoted as TiO2C@CNx) is developed, which is derived from the Ti3C2Tx and melamine–cyanuric acid calcinated at different temperatures. Among the series of TiO2C@CNx nanosheets, the TiO2C@CNx,950 (obtained by calcination at 950 °C) hybrid exhibits robust trifunctional electrocatalytic activity toward the hydrogen evolution reaction (HER), oxygen evolution reaction (OER), and oxygen reduction reaction (ORR) by combining the excellent electrochemical activity of the graphene-like nanostructure and the high electrocatalytic performances of TiO2 nanoparticles. When TiO2C@CNx,950 is used as the electrocatalyst for water splitting, a current density of 10 mA cm−2 (Ej = 10) is achieved at a low cell voltage of 1.50 V vs. reversible hydrogen electrode. Meanwhile, the overall oxygen activity of the TiO2C@CNx,950 exhibits good reversible oxygen reaction, giving a small potential difference between the Ej = 10 for OER and the half-wave potential for ORR (0.75 V). Moreover, a simply equipped Zn-air battery is assembled using a homemade cathode, showing open-circuit potential of 1.344 V, which also can supplied an electrical power and produced H2 at the cathode and O2 at the anode. Consequently, this work can pave a path for developing multifunctional electrocatalysts for water spitting and liquid Zn–air battery.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
