Ternary cobalt-molybdenum-zirconium coatings: electrolytic deposition and functional properties

  • N. Sakhnenko
  • M. Ved
  • M. Koziar

Abstract

Consistent patterns for electrodeposition of Co-Mo-Zr coatings from polyligand citrate-pyrophosphate bathwere investigated. The effect of both current density amplitude and pulse on/off time on the quality,composition and surface morphology of the galvanic alloys were determined. It was established the coating Co-Mo-Zr enrichment by molybdenum with current density increasing up to 8 A·dm−2 as well as the rising of pulsetime and pause duration promotes the content of molybdenum because of subsequent chemical reduction of itsintermediate oxides by hydrogen ad-atoms. It was found that the content of the alloying metals in the coatingCo-Mo-Zr depends on the current density and on/off times extremely and maximum Mo and Zr contentcorresponds to the current density interval 4–6 A·dm−2, on-/off-time 2–10 ms. It was shown that Co-Mo-Zralloys exhibits the greatest level of catalytic properties as cathode material for hydrogen electrolytic productionfrom acidic media which is not inferior a platinum electrode. The galvanic alloys Co-Mo-Zr with zirconiumcontent 2–3 at.% demonstrate high catalytic properties in the carbon(II) oxide conversion. This confirms theefficiency of materials as catalysts for the gaseous wastes purification and gives the reason to recommend themas catalysts for hydrocarbon combustion.
Published
2018-05-03
How to Cite
SAKHNENKO, N.; VED, M.; KOZIAR, M.. Ternary cobalt-molybdenum-zirconium coatings: electrolytic deposition and functional properties. Physical Sciences and Technology, [S.l.], v. 3, n. 2, p. 65-75, may 2018. ISSN 2409-6121. Available at: <http://phst.kaznu.kz/index.php/journal/article/view/108>. Date accessed: 14 aug. 2018.
Section
Nuclear Physics and Related Techology