The interaction of formic acid with Pt(111) and the effect of coadsorbed water, atomic oxygen, and carbon monoxide
We have investigated the reaction of HCOOH with the (111) surface of platinum and its dependence on surface temperature, surface concentration (coverage), and the presence of other adspecies such as H{sub 2}O, CO, and atomic oxygen. The motivation for this investigation originates in the electrochemical community, where an interest in the development of fuel cells has existed for years. Small oxygen-containing hydrocarbons like HCOOH show potential as fuels in cells utilizing platinum as the electrode material. The desired reaction in such a cell is the decomposition of the formic acid to produce CO{sub 2}, which desorbs from the electrode surface; however, a competing reaction produces adspecies which do not desorb. The accumulation of these adspecies prevents continued adsorption and reaction of formic acid and eventually renders the cell useless. We have probed the reaction of formic acid with Pt(111) in ultrahigh vacuum via thermal desorption spectroscopy and high resolution electron energy loss spectroscopy.
- Research Organization:
- Ames Lab., IA (United States)
- Sponsoring Organization:
- USDOE; USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-7405-ENG-82
- OSTI ID:
- 6070602
- Report Number(s):
- IS-T-1540; ON: DE92005094
- Resource Relation:
- Other Information: Thesis (Ph.D.)
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
36 MATERIALS SCIENCE
30 DIRECT ENERGY CONVERSION
CARBON MONOXIDE
ADSORPTION
FORMIC ACID
CHEMICAL REACTIONS
FUEL CELLS
ELECTROCHEMISTRY
OXYGEN
PLATINUM
SURFACE PROPERTIES
WATER
ENERGY-LOSS SPECTROSCOPY
LOW TEMPERATURE
ULTRAHIGH VACUUM
CARBON COMPOUNDS
CARBON OXIDES
CARBOXYLIC ACIDS
CHALCOGENIDES
CHEMISTRY
DIRECT ENERGY CONVERTERS
ELECTROCHEMICAL CELLS
ELECTRON SPECTROSCOPY
ELEMENTS
HYDROGEN COMPOUNDS
METALS
MONOCARBOXYLIC ACIDS
NONMETALS
ORGANIC ACIDS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PLATINUM METALS
SORPTION
SPECTROSCOPY
TRANSITION ELEMENTS
400201* - Chemical & Physicochemical Properties
360104 - Metals & Alloys- Physical Properties
300505 - Fuel Cells- Electrochemistry
Mass Transfer & Thermodynamics