Preparation and Application of Pd-Based Stainless Steel Wire Mesh Monolith Catalyst

Abstract

The Pd-based oxidation catalysts on stainless steel wire mesh(SSWM) monolith were prepared by electroless plating method. The effect of two different acid bath (including HNO3-HF and concentrated HCl) on the surface morphology of SSWM substrate and the adhesion of palladium particles with substrate were firstly studied. Then the etched SSWM monoliths were used as support to prepare Pd/SSWM monolith catalysts by electroless plating method and their application in toluene catalytic oxidation was also studied. The results indicated that the optimal palladium loading was 0.3wt% and the calcination temperature was 600°C. And the catalyst etched by HNO3-HF showed better activity in toluene catalytic oxidation and worse adhesion of palladium particles with substrate than that etched by concentrated HCl.

Pt-based structured catalysts on metallic supports synthesized by electroless plating deposition for toluene complete oxidation

“…However, the metallic substrates are kinds of non porous materials and more difficult to directly deposit noble metal active component on the substrate surface with strong adhesion and uniform dispersion, compared to the porous materials -such as ceramic substrates. The conventional methods for the deposition of active components on metallic substrates to prepare structured catalysts include impregnation and dip-coating [20][21][22][23]. But these two kinds of methods are difficult to reach the request of supported noble metal-based structured catalysts for robust adhesion and uniform dispersion of active components directly on metallic substrates without oxide interlayer film.…”