skip to main content
Language:
Resource type Show Results with: Show Results with: Index

Galvanic Deposition of Pt Nanoparticles on Black TiO2 Nanotubes for Hydrogen Evolving Cathodes

Touni, Aikaterini ; Liu, Xin ; Kang, Xiaolan ; Carvalho, Patricia A. ; Diplas, Spyros ; Both, Kevin G. ; Sotiropoulos, Sotirios ; Chatzitakis, Athanasios

ChemSusChem, 2021-11, Vol.14 (22), p.4993-5003 [Peer Reviewed Journal]

Weinheim: Wiley Subscription Services, Inc

Full text available

Citations Cited by
  • Title:
    Galvanic Deposition of Pt Nanoparticles on Black TiO2 Nanotubes for Hydrogen Evolving Cathodes
  • Author: Touni, Aikaterini ; Liu, Xin ; Kang, Xiaolan ; Carvalho, Patricia A. ; Diplas, Spyros ; Both, Kevin G. ; Sotiropoulos, Sotirios ; Chatzitakis, Athanasios
  • Subjects: Area ; Cathodes ; Density functional theory ; Deposition ; electrocatalysis ; electrode materials ; Electrolytes ; hydrogen evolution ; Hydrogen evolution reactions ; Image transmission ; Nanoparticles ; Nanotubes ; Noble metals ; Pt electrocatalyst ; TiO2 nanotubes ; Titanium dioxide
  • Is Part Of: ChemSusChem, 2021-11, Vol.14 (22), p.4993-5003
  • Notes: ObjectType-Article-1
    SourceType-Scholarly Journals-1
    ObjectType-Feature-2
    content type line 23
    NFR/197405
  • Description: A galvanic deposition method for the in‐situ formation of Pt nanoparticles (NPs) on top and inner surfaces of high‐aspect‐ratio black TiO2‐nanotube electrodes (bTNTs) for true utilization of their total surface area has been developed. Density functional theory calculations indicated that the deposition of Pt NPs was favored on bTNTs with a preferred [004] orientation and a deposition mechanism occurring via oxygen vacancies, where electrons were localized. High‐resolution transmission electron microscopy images revealed a graded deposition of Pt NPs with an average diameter of around 2.5 nm along the complete nanotube axis (length/pore diameter of 130 : 1). Hydrogen evolution reaction (HER) studies in acidic electrolytes showed comparable results to bulk Pt (per geometric area) and Pt/C commercial catalysts (per mg of Pt). The presented novel HER cathodes of minimal engineering and low noble metal loadings (μg cm−2 range) achieved low Tafel slopes (30–34 mV dec−1) and high stability in acidic conditions. This study provides important insights for the in‐situ formation and deposition of NPs in high‐aspect‐ratio structures for energy applications. Be spontaneous: Pt nanoparticles of a diameter of around 2 nm are deposited on black TiO2 nanotubes via the spontaneous galvanic deposition process, across the whole nanotube length truly utilizing the structure's high‐aspect‐ratio surface area. These electrodes of minimal engineering and low noble metal loadings show high activity and stability towards the hydrogen evolution reaction in acid.
  • Publisher: Weinheim: Wiley Subscription Services, Inc
  • Language: English;Norwegian
Back to results list
Go to Previous pagePrevious Result  2 NextGo to Next page

  • Implemented by: ABCD-USP USP   Social Network Logos: Freepik

Searching Remote Databases, Please Wait

  • Searching for
  • inscope:(USP_VIDEOS),scope:("PRIMO"),scope:(USP_FISICO),scope:(USP_EREVISTAS),scope:(USP),scope:(USP_EBOOKS),scope:(USP_PRODUCAO),primo_central_multiple_fe
  • Show me what you have so far