Formaldehyde Polymerization on (WO3)3/TiO2(110) Model Catalyst
Polymerization of formaldehyde, H2CO, was studied under ultrahigh vacuum conditions on a model catalyst consisting of monodispersed (WO3)3 clusters anchored on TiO2(110. Formaldehyde oligomers, (H2CO)n, desorbing from the polymer that formed on the catalyst surface are detected between 250 and 325 K in temperature programmed desorption experiments. At least two monolayers (ML) of H2CO are required on the surface to observe (H2CO)n desorption and the amount saturates for H2CO coverages in excess of ~30 ML. The presence of H2CO multilayers is required for the polymerization to take place indicating that it had to occur below 100 K. The saturation amount increases with increasing coverage of (WO3)3 clusters with the highest amount of ~13 ML observed on 1.2 (WO3)3/nm2 . No (H2CO)n desorption was observed on the bare TiO2(110) surface.
- Research Organization:
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States). Environmental Molecular Sciences Lab. (EMSL)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC05-76RL01830
- OSTI ID:
- 1000592
- Report Number(s):
- PNNL-SA-71733; ISSN 1932--7455; 24793; 25619; 30440; KC0302010; TRN: US201101%%396
- Journal Information:
- Journal of Physical Chemistry C, 114(40):17017-17022, Vol. 114, Issue 40; ISSN 1932--7447
- Country of Publication:
- United States
- Language:
- English
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