Robust 3-D configurated metal oxide nano-array based monolithic catalysts with ultrahigh materials usage efficiency and catalytic performance tunability

Constructed with parallel or honeycomb channels, monolithic devices such as catalysts, filters, and reactors have been utilized in various sectors ranging from household water treatment, mechanical, automotive, chemical, and pharmaceutical businesses, to biotechnology industries. By directly integrating the bare monoliths with metal oxide nanostructure arrays and Pt nanoparticles, the monolithic catalysts significantly reduce the Pt and metal oxide usages by 10-40 folds compared to typical washcoated powder-form catalysts. Meanwhile the nano-array catalysts exhibit excellent thermal and mechanical stability, as well as tunable catalytic CO oxidation performance. The 3-D configurated nano-array based monoliths represent a new general strategy to fabricate highly efficient and robust catalysts and reactors for various industrial applications .