Pt-based electrocatalysts for polymer electrolyte membrane fuel cells prepared by supercritical deposition technique

Bayrakçeken, Ayşe; Smirnova, Alevtina; Kitkamthorn, Usanee; Aindow, Mark; Turker, Lemi; Eroglu, Inci; Erkey, Can

doi:10.1016/j.jpowsour.2007.12.086

Makale Tam Makale Uluslararası 2008 Açık erişimli

Pt-based electrocatalysts for polymer electrolyte membrane fuel cells prepared by supercritical deposition technique

Ayşe Bayrakçeken, Alevtina Smirnova, Usanee Kitkamthorn, Mark Aindow, Lemi Turker, Inci Eroglu, Can Erkey

JOURNAL OF POWER SOURCES Cilt 179 · Sayı 2 · ss. 532–540 · 01.05.2008

DOI ile aç

Özet

Pt-based electrocatalysts were prepared on different carbon supports which are multiwall carbon nanotubes (MWCNTs), Vulcan XC 72R (VXR) and black pearl 2000 (BP2000) using a supercritical carbon dioxide (ScCO2) deposition technique. These catalysts were characterized by using X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM) and cyclic voltammetry (CV). XRD and HRTEM results demonstrated that the ScCO2 deposition technique enables a high surface area metal phase to be deposited, with the size of the Pt particles ranging from 1 to 2 nm. The electrochemical surface areas (ESAs) of the prepared electrocatalysts were compared to the surface areas of commercial ETEK Pt/C (10 wt% Pt) and Tanaka Pt/C (46.5 wt% Pt) catalysts. The CV data indicate that the ESAs of the prepared Pt/VXR and Pt/MWCNT catalysts are about three times larger than that of the commercial ETEK catalyst for similar (10 wt% Pt) loadings. Oxygen reduction activity was investigated by hydrodynamic voltammetry. From the slope of Koutecky-Levich plots, the average number of electrons transferred in the oxygen reduction reaction (ORR) was 3.5, 3.6 and 3.7 for Pt/BP2000, Pt/VXR and Pt/MWCNT, correspondingly, which indicated almost complete reduction of oxygen to water. (C) 2008 Published by Elsevier B.V.

Anahtar kelimeler

PERFORMANCE nanoparticles CARBON NANOTUBES platinum Electrocatalyst CARBON Oxygen reduction reaction Polymer electrolyte membrane fuel cell CATHODE Electrochemical reduction Methanol Supercritical carbon dioxide deposition AEROGEL NANOCOMPOSITES PLATINUM-BASED ELECTROCATALYSTS SUPPORTED CATALYSTS

Atıf için künye

Bayrakçeken, A., Smirnova, A., Kitkamthorn, U., Aindow, M., Turker, L., Eroglu, I., & Erkey, C. (2008). Pt-based electrocatalysts for polymer electrolyte membrane fuel cells prepared by supercritical deposition technique. JOURNAL OF POWER SOURCES, 179(2), 532–540. https://doi.org/10.1016/j.jpowsour.2007.12.086

BibTeX

@article{bayrakceken2008-187505,
  author = {Bayrakçeken, Ayşe and Smirnova, Alevtina and Kitkamthorn, Usanee and Aindow, Mark and Turker, Lemi and Eroglu, Inci and Erkey, Can},
  title = {Pt-based electrocatalysts for polymer electrolyte membrane fuel cells prepared by supercritical deposition technique},
  journal = {JOURNAL OF POWER SOURCES},
  year = {2008},
  volume = {179},
  number = {2},
  pages = {532--540},
  issn = {0378-7753},
  doi = {10.1016/j.jpowsour.2007.12.086},
  url = {https://akademik.atauni.edu.tr/yayinlar/187505-pt-based-electrocatalysts-for-polymer-electrolyte-membrane-fuel-cells-prepared}
}