An enhanced electrochemical energy conversion behavior of thermally treated thin film of 1-dimensional CoTe synthesized from aqueous solution at room temperature

Eun Kyung Kim, Hoa Thi Bui, Nabeen K. Shrestha, Chan Yong Shin, Supriya A. Patil, Shubhangi Khadtare, Chinna Bathula, Yong Young Noh, Sung Hwan Han

Research output: Contribution to journalArticlepeer-review

34 Scopus citations

Abstract

This work reports the influence of thermal treatment on electrocatalytic water oxidation/reduction behaviors of one dimensional CoTe nanotube film deposited on FTO substrate from aqueous solution at room temperature. The optimally annealed film at 200 °C demonstrates substantially better electrocatalytic properties, which can be ascribed to the enhanced electrochemical active surface area and electrical conductivity obtained by improving the intergranular connectivity. In addition, the annealed nanotube film demonstrates highly competitive performance to that of many outstanding electrocatalysts for overall splitting of alkaline water to generate hydrogen as green fuel with the oxygen evolution reaction overpotential of 0.37 V (without iR-compensation) for the benchmark current density of 10 mA cm−2.

Original languageEnglish
Pages (from-to)365-371
Number of pages7
JournalElectrochimica Acta
Volume260
DOIs
StatePublished - 10 Jan 2018

Keywords

  • Annealing
  • Cobalt telluride
  • HER
  • Intergranular connectivity
  • OER

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