Partially oxidized cobalt species in nitrogen-doped carbon nanotubes: Enhanced catalytic performance to water-splitting. (19th February 2021)

• Record Type: Journal Article
• Authors: Najam, Tayyaba; Ibraheem, Shumaila; Nazir, Muhammad Altaf; Shaheen, Asma; Waseem, Amir; Javed, Muhammad Sufyan; Shah, Syed Shoaib Ahmad; Cai, Xingke
• Is Part Of: International journal of hydrogen energy. Volume 46:Number 13(2021)
• Page Start: 8864
• Page End: 8870
• Publication Date: 2021-02-19
• Subjects: Nitrogen-doped carbon nanotubes -- Metal oxides -- Hydrogen evolution reaction -- Water-splitting; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2021.01.016
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: It's still an ongoing research challenge to explore non-precious metal-based catalysts for substituting precious metal catalysts during full water electrocatalysis. Herein, we reported the partially oxidized cobalt species in nitrogen-doped carbon nanotubes hierarchical structures to produce dual-functionality towards oxygen/hydrogen evolution reactions. The in situ transformation of carbon nanotubes and well-exposed metal-oxide contributes to mass diffusion and greater electrolyte-accessible surface area. The as-synthesized catalyst displays low overpotentials of 287 mV and 171 mV for oxygen and hydrogen evolution reactions at 10 mA cm −2 of current density with remarkable performance during long-term stability. Furthermore, when employed as cathode and anode, a respectable performance of 1.68 V demonstrated our catalyst as an efficient bifunctional material for conducting water-splitting operation. Graphical abstract: Image 1 Highlights: Nanostructure engineering by surficial induced approach. The strong interface connection of active sites and conducting carbon matrix. In situ formation of CNTs anchored Co-Ox . An efficient bifunctional material for conducting water-splitting.