Reduction of nitrate on active carbon supported Pd-Cu catalysts

Bimetallic Pd-Cu catalysts supported on active carbon were tested for nitrate reduction in water. The catalysts were prepared either by successive incipient wetness impregnation or catalytic reduction and were characterized by HRTEM, XRD, TPR-H2 and H2-chemisorption. The method of preparation exerts an influence on the activity of Pd-Cu catalysts for nitrate reduction, but the effect on their selectivity to ammonia is negligible. The Cu/Pd atomic ratio and total metal content affect both activity and selectivity of the catalysts prepared by chemical reduction.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (100 K)Download as PowerPoint slideHighlights► Wetness impregnation or catalytic reduction (CR) for catalyst preparation. ► Pd-Cu/C catalyst for nitrate reduction in water. ► Preparation method affects on the catalyst activity ► Preparation method does not affect on catalyst selectivity. ► Properties of Pd-Cu/C prepared by CR depend on Cu/Pd ratio and metals content.