Pt Supported on Carbon‐coating Antimony Tin Oxide as Anode Catalyst for Direct Methanol Fuel Cell

Abstract

A qualified support material for Pt must has numerous deposition sites for Pt nanoparticles and great electrical conductivity. Metal oxide materials are potential support materials for Pt nanoparticles. However, they have less deposition sites for Pt and worse electronic conductivity than carbon. Carbon over the surface of metal oxide materials can improve the above shortage. In this paper, antimony tin oxide (ATO) coated by carbon layer has been successfully prepared by plasma enhanced chemical vapor deposition method (PECVD). PECVD can provide a brief approach to enwrap metal oxide with carbon at low temperatures. Besides, it becomes easier to control the amount of carbon by the PECVD to create much more two‐phase interface for Pt deposition. The carbon layer promotes the electronic conductivity of ATO and provides more deposition sites for platinum nanoparticles, which directly influence the size of Pt nanoparticles as well as the electrochemical active surface areas. The as‐prepared catalyst exhibits excellent activity for methanol oxidation reaction (MOR), which is twice of that of the commercial Pt/C catalyst. Meanwhile, it has better stability than the commercial Pt/C.

Enhancement of Catalytic Activity and Durability of Pt Nanoparticle through Strong Chemical Interaction with Electrically Conductive Support of Magnéli Phase Titanium Oxide

“…To alleviate the negative effects of the amorphous carbon deterioration, corrosion-resistant carbon supports; CNT [ 7 , 8 ], CNF [ 9 ], and graphene [ 10 , 11 ], heteroatom doped carbon [ 12 ] and also metal oxide supports have been introduced in the literature [ 13 , 14 , 15 , 16 , 17 , 18 ]. Among varied metal oxides [ 19 , 20 , 21 ], TiO 2 draws prominent attention because of high chemical-durability and good corrosion-resistance under PEFCs operation.…”

Strong Interaction between Platinum Nanoparticles and Tantalum-Doped Tin Oxide Nanofibers and Its Activation and Stabilization Effects for Oxygen Reduction Reaction

“…In order to increase its conductivity, tin oxide is mostly employed in composites with carbon e.g. as a protecting layer preserving the conductivity of the support [19][20][21] or n-doped with pentavalent ions [22] including niobium [23][24][25][26][27][28] and antimony [15,24,[36][37][38]26,[29][30][31][32][33][34][35] providing an extra electron as charge carrier.…”

“…With this aim, a range of materials and chemical compositions have been investigated, from graphitized carbons and conducting polymers to transition-metal nitrides, carbides, borides, and oxides. − Electrocatalysts deposited on nanostructured transition-metal oxides have demonstrated high electrochemical stability at high potential − with good electroactivity, which was attributed to their strong electronic interaction with these supports. − Tin oxide has been widely considered as an alternative to carbon , because of its high conductivity compared to other metal oxides because of the presence of oxygen vacancies and nonstoichiometric SnO 2‑δ . In order to increase its conductivity, tin oxide is mostly employed in composites with carbon, for example, as a protecting layer preserving the conductivity of the support − or n-doped with pentavalent ions including niobium − and antimony ,,,− providing an extra electron as a charge carrier.…”