The pH-dependent adsorption of m-nitrobenzene sulphonic acid on a thermally prepared Ti/TiO2 electrode
作者： C. Ravichandran , M. Noel , S. Thangavelu , P.N. Anantharaman
DOI: 10.1016/0022-0728(94)87101-9
关键词: Chemistry 、 Adsorption 、 Transition metal 、 Sulfuric acid 、 Electrochemistry 、 Nitrobenzene 、 Nitro compound 、 Isoelectric point 、 Protonation 、 Inorganic chemistry
摘要: Cyclic voltammetric studies of m-nitrobenzene sulphonic acid on a thermally coated Ti/TiO2 electrode in solutions wide pH range from 5.0 M H2SO4 to 1.0 NaOH show pH-sensitive adsorption post-peak addition the peak potential region TiO2/TiOOH surface process. The post appears only between −0.43 (1.0 H2SO4) and 5.5. higher limit is close isoelectric point TiO2 reported literature. pH-dependent attributed an acid—base interaction protonated sulphonate anionic centre aromatic nitrocompound. Below −0.43, however, hydrogen evolution swamps post-peak.
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