ACID-BASE REACTIONS ON SOLID-SURFACES - THE REACTIONS OF HCOOH, H2CO, AND HCOOCH3 WITH OXYGEN ON AG(110) Academic Article uri icon

abstract

  • The effect of oxygen adsorbed on a Ag(110) surface on the adsorption and reaction characteristics of HCOOH, H2CO, and HCOOCH3 was examined. No adsorption or reaction of these species was observed on the clean Ag(110) surface. All three reacted readily with adsorbed oxygen, however, to produce stable adsorbed intermediates. HCOOH reacted with adsorbed oxygen to produce two adsorbed formates for each oxygen atom initially adsorbed plus H2O, which desorbed from the surface during adsorption. H2CO reacted with surface oxygen to form an H2CO2 intermediate, which decomposed at 240 K to liberate hydrogen and produce the stable formate. Surface oxygen attacked HCOOCH3 at the acyl carbon to form adsorbed CH3O and HCOO species. The HCOO(a) intermediates formed from HCOOH, H2CO, and HCOOCH3 were indistinguishable. HCOO(a) decomposed with first-order kinetics at 410 K to yield CO2, H2 and traces of HCOOH. These patterns of reactivity clearly identify the chemical nature of adsorbed oxygen as a strong base. 1980.

published proceedings

  • SURFACE SCIENCE

author list (cited authors)

  • BARTEAU, M. A., BOWKER, M., & MADIX, R. J.

citation count

  • 161

complete list of authors

  • BARTEAU, MA||BOWKER, M||MADIX, RJ

publication date

  • April 1980