Catalytic activity of cobalt deposited on nanostructured poly(p-xylylene) films

Niranjan Malvadkar, Sunyoung Park, Mirna Urquidi-MacDonald, Hui Wang, Melik C. Demirel

Research output: Contribution to journalArticle

42 Citations (Scopus)

Abstract

Nanostructured and planar films of poly(p-xylylene) (PPX) are fabricated by an oblique angle polymerization method and coated with cobalt using electroless deposition. The catalytic activity of cobalt coated on the nanostructured and planar PPX films is studied by measuring the rate of hydrogen evolution by the hydrolysis of alkaline-stabilized sodium borohydride (NaBH4) solution. The hydrogen release rate data show an asymptotic increase for the structured PPX film as a function of the electroless bath time, but the planar PPX films show a lower catalytic activity due to the inefficiency of cobalt deposition. The hydrogen release rate of the cobalt-coated nanostructured PPX film shows a rate between 2000 and 4250 mL(g min)-1 (i.e., rate of hydrogen gas per cobalt mass at room temperature and pressure), which is comparable to the values obtained on platinum, and ruthenium systems.

Original languageEnglish (US)
Pages (from-to)323-328
Number of pages6
JournalJournal of Power Sources
Volume182
Issue number1
DOIs
StatePublished - Jul 15 2008

Fingerprint

Cobalt
catalytic activity
Catalyst activity
cobalt
Hydrogen
hydrogen
electroless deposition
Ruthenium
borohydrides
Electroless plating
Platinum
ruthenium
hydrolysis
baths
Hydrolysis
platinum
polymerization
Gases
Polymerization
Sodium

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

Cite this

Malvadkar, Niranjan ; Park, Sunyoung ; Urquidi-MacDonald, Mirna ; Wang, Hui ; Demirel, Melik C. / Catalytic activity of cobalt deposited on nanostructured poly(p-xylylene) films. In: Journal of Power Sources. 2008 ; Vol. 182, No. 1. pp. 323-328.
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Catalytic activity of cobalt deposited on nanostructured poly(p-xylylene) films. / Malvadkar, Niranjan; Park, Sunyoung; Urquidi-MacDonald, Mirna; Wang, Hui; Demirel, Melik C.

In: Journal of Power Sources, Vol. 182, No. 1, 15.07.2008, p. 323-328.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Catalytic activity of cobalt deposited on nanostructured poly(p-xylylene) films

AU - Malvadkar, Niranjan

AU - Park, Sunyoung

AU - Urquidi-MacDonald, Mirna

AU - Wang, Hui

AU - Demirel, Melik C.

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AB - Nanostructured and planar films of poly(p-xylylene) (PPX) are fabricated by an oblique angle polymerization method and coated with cobalt using electroless deposition. The catalytic activity of cobalt coated on the nanostructured and planar PPX films is studied by measuring the rate of hydrogen evolution by the hydrolysis of alkaline-stabilized sodium borohydride (NaBH4) solution. The hydrogen release rate data show an asymptotic increase for the structured PPX film as a function of the electroless bath time, but the planar PPX films show a lower catalytic activity due to the inefficiency of cobalt deposition. The hydrogen release rate of the cobalt-coated nanostructured PPX film shows a rate between 2000 and 4250 mL(g min)-1 (i.e., rate of hydrogen gas per cobalt mass at room temperature and pressure), which is comparable to the values obtained on platinum, and ruthenium systems.

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