The photoelectrocatalytic activity, long term stability and corrosion performance of NiMo deposited titanium oxide nano-tubes for hydrogen production in alkaline medium

MERT M. E., Mert B., KARDAŞ G., Yazici B.

APPLIED SURFACE SCIENCE, vol.423, pp.704-715, 2017 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 423
  • Publication Date: 2017
  • Doi Number: 10.1016/j.apsusc.2017.06.216
  • Journal Name: APPLIED SURFACE SCIENCE
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.704-715
  • Keywords: Catalysis, Coating materials, Corrosion, Electrochemical impedance spectroscopy, Hydrogen production, CONTACT-ANGLE MEASUREMENT, EVOLUTION REACTION, WATER ELECTROLYSIS, MO ALLOY, ELECTROCHEMICAL PERFORMANCE, ELECTROCATALYTIC ACTIVITY, DEGREES-C, ELECTRODES, COATINGS, CATHODE
  • Çukurova University Affiliated: Yes

Abstract

In this study, titanium oxide nano-tubes are doped with Ni and Mo particles with various chemical compositions, in order to put forth the efficiency of single and binary coatings on hydrogen evolution reaction (HER) in 1 M KOH. The characterization was achieved by cyclic voltammetry, scanning electron microscopy and energy dispersive X-ray analysis. The water wettability characteristics of electrode surfaces were investigated using contact angle. The long-term catalyst stability and corrosion performance were determined by current-potential curves and electrochemical impedance spectroscopy. Furthermore, photoelectrochemical behavior was determined via linear sweep voltammetry. Results showed that, nano-structured Ni and Mo deposited titanium oxide nano-tubes decrease the hydrogen over potential and increase HER efficiency, it is stable over 168 h electrolysis and it exhibits higher corrosion performance. (C) 2017 Elsevier B.V. All rights reserved.