Acetic acid adsorption

Adsorption of acetic acid on Pt(lll) surface was studied the surface concentration data were correlated with voltammetric profiles of the Pt(lll) electrode in perchloric acid electrolyte containing 0.5 mM of CHoCOOH. It is concluded that acetic acid adsorption is associative and occurs without a significant charge transfer across the interface. Instead, the recorded currents are due to adsorption/desorption processes of hydrogen, processes which are much better resolved on Pt(lll) than on polycrystalline platinum. A classification of adsorption processes on catalytic electrodes and atmospheric methods of preparation of single crystal electrodes are discussed. 

As shown in Figure 4, the increase in adsorption of acetic acid on Pt(lll) occurs in the potential range of 0.15 to 0.3 V, which roughly coincides with position of the current-potential peak of the voltammogram recorded in the same solution. An interdependence can thus be sought between acetic acid adsorption... 

The situation is quite different in the case of an acetic acid-water system. The energy of acetic acid adsorption on platinum is low and therefore the voltammetric curves taken in the absence and in the presence of acetic acid in the supporting electrolyte are nearly the same. However, radiometric data show that C-labeled acetic acid is adsorbed on the electrode surface. Most likely the acetic acid molecules are adsorbed on the top of the water molecules populating the electrode surface. Simultaneously recorded voltammetric and counting rate data are shown in Fig. 8. 

Baraton, M. I., Chen, X., and Gonsalves, K. E., FTIR study of nanostructured aluminum nitride powder surface determination of the acidic/basic sites by CO, CO2 and acetic acid adsorptions. Nanostructured Materials 8 (4), 435-445 (1997). 

Bowker M, Morgan C, Couves J (2004) Acetic acid adsorption and decomposition on Pd(llO). Surf Sci 555 145... 

Fig. 4. The adsorption of pyridine and acetic acid on tin-antimony oxides, (a) Graph showing adsorbed pyridine ( ) and adsorbed acetic acid (O) values as a function of bulk antimony content for catalysts precalcined at 600°C. (b) Variation of the amount of adsorbed pyridine and acetic acid as a function of calcination temperature (°C) of the tin-antimony oxides (O) pyridine adsorption on 6% Sb catalyst (A) pyridine on 19% Sb catalyst ( ) pyridine on 33% Sb catalyst ( + ) pyridine on 64% Sb catalyst ( ) acetic acid adsorption on 6% Sb catalyst (A) acetic acid on 19% Sb catalyst ( ) acetic acid on 33% Sb catalyst (x) acetic acid on 64% Sb catalyst. [Reproduced from J. C. McAteer (7J).]...

Pressure-jump relaxation was also used by others to study anion adsorption/desorption kinetics on soil constituents. These investigations have included the study of the kinetics and mechanisms of acetic acid adsorption on a silica-alumina surface (Ikeda et al., 1982a) and phosphate (Mikami et al., 1983a) and chromate adsorption (Mikami et al., 1983b), on 7-AI2O3. Double relaxation times on the order of milliseconds were observed in each of these studies. 

Figure 2 Temperature programmed desorption experiment after acetic acid adsorption on Pd(llO) a) on the clean surface and b) on the surface predosed with half a monolayer of C atoms in the c(2x2) structure...

This Appendix gives the location of the large amount of data scattered throughout the textbook, abietic acid-heptane-methylcellosolve+10% water Distribution coefficient. Table 13-3 acetic acid Adsorption isotherm on activated carbon, Table 18-2 and Problem 18.D7 acetic acid-benzene-water Distribution coefficients. Table 13-3 acetic acid-l-butanol-water Distribution coefficient. Table 13-3 acetic acid-3-heptanol-water Distribution coefficient. Problems 13.D5 and 13.D6 acetic acid-isopropyl ether-water Equilibrium data. Table 13-5 acetonaphthalene Adsorption isotherm on silica gel. Table 18-2... 

M. Heinen, Z. Jusys, R.J. Behm, Ethanol, acetaldehyde and acetic acid adsorption/electrooxidation on a pt thin film electrode under continuous electrolyte flow an in situ ATR-FTIRS flow cell study, J. Phys. Chem. C 114 (2010) 9850-9864. 

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