Improved ORR Activity and Long-Term Durability of Pt Nanoparticles Deposited on TiO2-Decorated Multiwall Carbon Nanotubes. Issue 16 (3rd December 2019)

• Record Type: Journal Article
• Authors: Hussain, Sajid; Erikson, Heiki; Kongi, Nadezda; Tarre, Aivar; Ritslaid, Peeter; Kook, Mati; Rähn, Mihkel; Merisalu, Maido; Sammelselg, Väino; Tammeveski, Kaido
• Is Part Of: Journal of the Electrochemical Society. Volume 166:Issue 16(2019)
• Page Start: F1284
• Page End: F1291
• Publication Date: 2019-12-03
• Subjects: Electrocatalysis -- Electrocatalysis -- Oxygen reduction -- Pt nanoparticles; Electrochemistry -- Periodicals; 541.3705
• DOI: 10.1149/2.0071916jes
• Languages: English
• ISSNs: 0013-4651

Abstract

Abstract : Titanium dioxide coatings of different thicknesses were deposited on the acid-treated multiwall carbon nanotubes (MWCNTs) using controlled atomic layer deposition (ALD). Pt nanoparticles (NP) were deposited on TiO2 /MWCNT supports using two deposition methods, viz. sputter-deposition and photo-deposition. Scanning electron microscopy (SEM) and scanning transmission electron microscopy (STEM) measurements revealed successful application of ALD for the deposition of TiO2 . Both magnetron sputtering and photo-deposition were found to be efficient and well-controlled techniques for the deposition of Pt NPs on oxide-carbon support. Electrochemical decontamination and characterization of the catalysts surface was carried out by CO stripping and cyclic voltammetry in 0.1 M KOH solution. The prepared Pt-TiO2 /MWCNT catalyst showed comparable oxygen reduction reaction (ORR) activity to that of commercial Pt/C (20 wt%), while long-term durability test revealed better durability of the prepared catalysts due to strong metal-support interaction.