首页>
外文期刊>catalysts
>The Use of C-MnO 2 as Hybrid Precursor Support for a Pt/C-Mn x O 1+x Catalyst with Enhanced Activity for the Methanol Oxidation Reaction (MOR)
【24h】
The Use of C-MnO 2 as Hybrid Precursor Support for a Pt/C-Mn x O 1+x Catalyst with Enhanced Activity for the Methanol Oxidation Reaction (MOR)
Platinum (Pt) nanoparticles are deposited on a hybrid support (C-MnO 2 ) according to a polyol method. The home-made catalyst, resulted as Pt/C-Mn x O 1+x , is compared with two different commercial platinum based materials (Pt/C and PtRu/C). The synthesized catalyst is characterized by means of FESEM, XRD, ICP-MS, XPS and #x3BC;RS analyses. MnO 2 is synthesized and deposited over a commercial grade of carbon (Vulcan XC72) by facile reduction of potassium permanganate in acidic solution. Pt nanoparticles are synthesized on the hybrid support by a polyol thermal assisted method (microwave irradiation), followed by an annealing at 600 #xB0;C. The obtained catalyst displays a support constituted by a mixture of manganese oxides (Mn 2 O 3 and Mn 3 O 4 ) with a Pt loading of 19 wt. . The electro-catalytic activity towards MOR is assessed by RDE in acid conditions (0.5 M H 2 SO 4 ), evaluating the ability to oxidize methanol in 1 M concentration. The synthesized Pt/C-Mn x O 1+x catalyst shows good activity as well as good stability compared to the commercial Pt/C based catalyst.
展开▼
