| Autor: |
Baber AE; Chemistry Department, Brookhaven National Laboratory, Upton, NY 11973, USA., Mudiyanselage K, Senanayake SD, Beatriz-Vidal A, Luck KA, Sykes EC, Liu P, Rodriguez JA, Stacchiola DJ |
| Jazyk: |
angličtina |
| Zdroj: |
Physical chemistry chemical physics : PCCP [Phys Chem Chem Phys] 2013 Aug 07; Vol. 15 (29), pp. 12291-8. Date of Electronic Publication: 2013 Jun 17. |
| DOI: |
10.1039/c3cp51533h |
| Abstrakt: |
Formic acid (HCOOH) deprotonates on the open surfaces of Cu(110) and Cu(100) when exposed at 300 K. However, this does not occur on the close-packed surface of clean Cu(111). In this study, we show that the deprotonation of formic acid on atomically flat Cu(111) surfaces can be induced by pre-adsorbing polymeric formic acid clusters at low temperatures, and then annealing the system to break the acidic O-H bond of HCOOH adsorbed on the edges of the polymeric clusters. The thermal activation of HCOOH to bidentate formate was studied using a combination of infrared reflection absorption spectroscopy, scanning tunneling microscopy, X-ray photoelectron spectroscopy, and near edge X-ray absorption fine structure spectroscopy. Extended 1D formate structures self-assemble due to a templating effect introduced by the formation of long α-polymeric formic acid chains commensurate with the substrate. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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