The Use of C-MnO2 as Hybrid Precursor Support for a Pt/C-MnxO1+x Catalyst with Enhanced Activity for the Methanol Oxidation Reaction (MOR)

Catalysts

Alessandro H.A. Monteverde Videla²  Luigi Osmieri²  Reza Alipour Moghadam Esfahani²  Juqin Zeng²  Carlotta Francia²  Stefania Specchia¹ 

[1] Department of Applied Science and Technology, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Torino, Italy;

关键词: rotating disk electrode;    platinum nanoparticles;    hybrid support;    manganese oxides;    methanol oxidation reaction (MOR);    CO stripping;   

DOI  :  10.3390/catal5031399

来源: mdpi

【 摘 要 】

Platinum (Pt) nanoparticles are deposited on a hybrid support (C-MnO₂) according to a polyol method. The home-made catalyst, resulted as Pt/C-Mn_xO_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 μRS analyses. MnO₂ 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 °C. The obtained catalyst displays a support constituted by a mixture of manganese oxides (Mn₂O₃ and Mn₃O₄) with a Pt loading of 19 wt. %. The electro-catalytic activity towards MOR is assessed by RDE in acid conditions (0.5 M H₂SO₄), evaluating the ability to oxidize methanol in 1 M concentration. The synthesized Pt/C-Mn_xO_1+x catalyst shows good activity as well as good stability compared to the commercial Pt/C based catalyst.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.