In this work, a new type of monolithic catalyst constructed with three dimensional nanowire arrays has been fabricated by a facile hydrothermal method. Various metal oxide nanowires including ZnO, TiO2, Co3O4 and CeO2 have been successfully grown on the ceramic cordierite and stainless steel honeycomb substrate with deposited Pt nanoparticles. Without sacrificing catalytic performance, the materials utilization efficiency of both oxide support and noble metals has been greatly improved by 10-40 times compared with the traditional monolithic catalyst of wash-coated powder. The hierarchical nanowire arrays also display thermal and mechanical robustness with sustained structure and property after 100 hours' annealing at 800 �C and 10 days of rapid air flow. The catalytic activity can be rationally tuned by changing the nanostructures geometry.

Monolithic honeycombs constructed by hierarchical nanowire arrays as a green catalyst with high materials utilization efficiency and tunable catalytic performance

247th National Meeting (2014)

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