Cardona-Martinez

Diaz-Mendoza, F.A., Pemett-Bolano, L., and Cardona-Martinez, N., Thermochim. Acta 312, 47 (1998). 

R. Mendez-Roman, N. Cardona-Martinez, Catal. Today 40 (1998) 353. 

Presently, calorimetry linked to the volumetric technique is still the most commonly used method to study the gas-solid interactions [123], A complete description of the technique and valuable information provided is given in the different reviews by Cardona-Martinez and Dumesic [118], Auroux [145], Andersen and Kung [153] and Farneth and Gorte [154]. 

Mendez-Roman and Cardona-Martinez [55] examined titanium dioxide catalysts with FTIR spectroscopy during the photocatalytic oxidation of toluene. Reaction intermediates, believed to be benzaldehyde and benzoic acid, were reported to accumulate on catalyst samples. This accumulation of intermediates was found to be reduced in the presence of gas-phase water. Mendez-Roman and Cardona-Martinez concluded that toluene appeared to be converted to benzaldehyde, which was then oxidized further to form benzoic acid. They suggested that the accumulation of benzoic acid led to the observed apparent catalyst deactivation. Other researchers, however, have argued that benzoic acid is unlikely to be the compound responsible for apparent deactivation in the photocatalytic oxidation of aromatics. For example, Larson and Falconer [43] concluded, based on higher CO2 evolution rates for benzoic acid relative to toluene during photooxidation, that benzoic acid was not sufficiently recalcitrant to be responsible for the deactivation seen with aromatic contaminants. 

Mendez-Roman, R. Cardona-Martinez, N. Catal. Today 1998, 40, 353. d Hennezel, O. Pichat, P. Ollis, D. F. J. Photochem. Photobio. A. 1998. 118, 197. Lewandowski, M Thesis, North Carolina State University, 2002, p. 115. 

J. C. Vartuli, J. G. Santiesteban, P. Traverso, N. Cardona-Martinez, C. Chang, and S. A. Stevenson, Characterization of the Acid Properties of Tungsten/Zirconia Catalysts Using Adsorption Microcalorimetry and n - Pentane Isomerization Activity, J. Catal. 187, 131-138 (1999). 

Cardona-Martinez and Dumesic [30] have analyzed the problem of surface mobility of the adsorbates for the particular case of adsorption of basic probe molecules on acid sites of oxides. Without equilibration of adsorbate with surface sites, the measured differential heat would only be an average value of the sites that the molecules adsorb on, and differences among sites would not be detected. Thus, ideally, measurements should be made at as a high a temperature as feasible without desorbing or decomposing the adsorbate. 

The surface acid-base properties of bulk oxides can be conveniently investigated by studying the adsorption of suitably chosen basic-acidic probe molecules on the solid. Acidic and basic sites are often present simultaneously on solid surfaces. The two centers may work independently or in a concerted way, and the occurrence of bifunctional reaction pathways requiring a cooperative action of acidic and basic centers has also received considerable attention [39]. The acid-base properties of numerous amorphous metal oxides investigated by mrcrocalorime-try have been summarized in an extensive review by Cardona-Martinez and Dumesic [11]. 

Goddard, S. A., M. D. Amiridis, J. E. Rekoske, N. Cardona-Martinez, and J. A. Dumesic, Kinetic simulation of heterogeneous catalytic processes ethane hydrogenolysis over Group VIII metals, J. Catal., 117, 155-169 (1989). 

Using adsorption calorimetry of pyridine at 473 K, Cardona-Martinez and Dumesic (18,19) found that the silica surface was energetically homogeneous... 

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