Metal-organic framework material supported Pt nanoclusters as a bifunctional catalyst for complete elimination of HCHO at ambient conditions

Abstract For the abatement of indoor HCHO pollution, it is highly desirable to obtain a catalyst that can realize good removal efficiency and long lifetime at ambient conditions. Herein, a metal–organic framework (CAU-1) material supported Pt catalyst is developed, on which HCHO can be completely eliminated by one step “storage-oxidation” process at room temperature. The material of CAU-1 type is employed for the first time as HCHO adsorbent and concurrently serve as the support of Pt-based catalyst. It is found that CAU-1-(OH)2 and CAU-1-NH2 exhibit remarkable HCHO adsorption capacities of around 1.61 and 3.23 mmol gcat-1 at ambient conditions, respectively, which are several times higher than the former adsorbents. Furthermore, the supported Pt nanoclusters, with an extremely low loading of 0.1 wt%, can totally oxidize the adsorbed HCHO to produce CO2 and H2O. It is the high HCHO “storage” capacities of CAU-1 and the favorable activation of O2 by metallic Pt species on 0.1Pt/CAU-1-(OH)2 that contribute to the tandem elimination of HCHO with a good cyclic stability. This work provides an important implication to design the bifunctional catalysts for the indoor pollutant elimination.