Ma Z. Solvent effect on CO oxidation as a novel diagnosing tool to pin down low-coverage CO at the liquid–solid interface: An in situ infrared study.
J Colloid Interface Sci 2006;
304:419-30. [PMID:
17028007 DOI:
10.1016/j.jcis.2006.09.005]
[Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2006] [Revised: 08/30/2006] [Accepted: 09/04/2006] [Indexed: 10/24/2022]
Abstract
In situ probing of liquid-solid interfaces is important for understanding heterogeneous liquid-phase catalysis and other interfacial phenomena, but the spectroscopic interference from the bulk is often a problem. Some organics may have infrared features overlapping the adsorbed CO peaks, making the determination of adsorbed CO difficult. In this study, CCl4-flushing was used as a novel diagnosing tool to pin down the low-coverage CO derived from decarbonylation of organics. This diagnosing tool was designed based on our in situ reflection-absorption infrared spectroscopy results reported here that there is a marked solvent effect (water > ethanol > methanol > cyclohexane > benzene approximately carbon tetrachloride) on CO oxidation at the liquid-solid interface. Possible reasons for that solvent effect were discussed.
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