Accession Number:

ADA429817

Title:

Scholarly Research Program. Delivery Order 0007: Characterization of Ionic Liquids as Fuel Cell Electrolytes

Descriptive Note:

Final rept. 1 Jan 2003-1 Jun 2004

Corporate Author:

AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH PROPULSION DIRECTORATE

Report Date:

2004-11-01

Pagination or Media Count:

21.0

Abstract:

The object of this work was to synthesize the room temperature ionic liquids, EMImBF4, BMImBF4 and BMPBETI, and to study the electrochemical behavior of ethanol in these electrolytes on the Pt electrode. The electrochemical oxidation of EtOH on Pt electrodes in acidic medium involves several reaction pathways. The predominant pathway involves oxidation of bulk EtOH to CH3CHO which can be further partially oxidized to acetic acid. The secondary reaction involves oxidation of a strongly bound adsorbate, breaking the C-C bond and the formation of CO2. The electrochemical behavior of EtOH in ionic liquid was investigated and compared to the one obtained in acid aqueous electrolyte. It is expected that the use of the room-temperature ionic liquids might prevent poisoning of Pt electrode, by formation of PtO2 , and oxidize EtOH to CH3COOH or CO2.

Subject Categories:

  • Organic Chemistry
  • Physical Chemistry
  • Electrochemical Energy Storage
  • Fuels

Distribution Statement:

APPROVED FOR PUBLIC RELEASE