The influences of microwave irradiation and polyol precursor pH on Cu/AC catalyst and its CO oxidation performance
- 251 Downloads
This study evaluated the effects of microwave irradiation parameters and the pH of the polyol precursor on the morphological features and catalytic performances of Cu/activated carbon (AC) catalysts. Experimental results of carbon monoxide (CO) oxidation indicated that the highest catalytic activity is achieved when the Cu/AC catalyst is prepared with microwave irradiation at 700 W for 60 s. Scanning electron microscopy revealed the presence of beneficial small copper aciculae on the Cu/AC catalyst under such a microwave irradiation scheme. Further investigation of operational parameters found that the performance of Cu/AC catalysts is enhanced by adopting a pH = 12 polyol precursor solution. With the observation that small cube copper (~16 nm) aggregates form when a pH = 12 polyol precursor solution is used, this study also demonstrated the importance of controlling the morphology of metal nanoparticles on Cu/AC catalysts when using the microwave-assisted polyol method.
KeywordsSupported copper catalyst CO oxidation Microwave-assisted polyol process pH
- Guo Z, Chen Y, Li L, Wang X, Haller GL, Yang Y (2010) Carbon nanotube-supported Pt-based bimetallic catalysts prepared by a microwave-assisted polyol reduction method and their catalytic applications in the selective hydrogenation. J Catal 276(2):314–326. doi: 10.1016/j.jcat.2010.09.021 CrossRefGoogle Scholar
- Hernández-Fernández P, Montiel M, Ocón P, de la Fuente JLG, García-Rodríguez S, Rojas S, Fierro JLG (2010) Functionalization of multi-walled carbon nanotubes and application as supports for electrocatalysts in proton-exchange membrane fuel cell. Appl Catal B 99(1–2):343–352Google Scholar
- Huang YJ, Qi GR, Chen LS (2003) Effects of morphology and composition on catalytic performance of double metal cyanide complex catalyst. Appl Catal A 240(1–2):263–271Google Scholar
- Sales EA, Benhamida B, Caizergues V, Lagier J-P, Fiévet F, Bozon-Verduraz F (1998) Alumina-supported Pd, Ag and Pd–Ag catalysts: preparation through the polyol process, characterization and reactivity in hexa-1,5-diene hydrogenation. Appl Catal A 172(2):273–283. doi: 10.1016/s0926-860x(98)00124-0 CrossRefGoogle Scholar