Abstract
Charcoal-supported Pd-Pt catalysts based on Pd-Pt/NOct 4Cl colloidal alloys have superior activity and selectivity in the oxidation of glucose to gluconic acid compared with industrial heterogeneous Pd-Pt catalysts. According to transmission electron microscopy, X-ray diffraction/Debye function analysis, X-ray photoelectron spectroscopy, X-ray absorption near edge structure, and extended X-ray absorption fine structure analysis the chemical coreduction of PdCl 2 and PtCl 2 in the appropriate ratio with NOct 4BEt 3H yielded the alloyed Pd-Pt colloids in organic solvents. They are screened by the lipophilic NOct 4Cl surfactant layer from coagulation and poisoning. TEM showed colloids of particle sizes in the range from 1.5 to 3 nm.
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