Actually platinum is still the most common metal catalyst in both anode and cathode fuel cell. In spite of the many attempts made in the last decade to develop non-Pt based catalysts for low temperature air cathodes, Pt remains the catalyst of choice, at least for acid based fuel cells. The situation in alkaline electrolytes is rather different; due to the stability of non-noble metals in this environment, many more opportunities are available for the development of non-Pt catalysts for the Oxygen Reduction Reaction (ORR) and for the Ethanol Oxidation Reaction (EOR). To completely remove Pt and to replace it with less expensive materials, bimetallic electrocatalysts have been proposed to exploit a synergic mechanism with one metal able to break the O-O bond of the molecular oxygen at the cathode side and the second metal effective in reducing the adsorbed oxygen so formed. An alternative approach to the design of promising electrocatalysts for the fuel cell application is represented by light-heteroelement doped carbon nanomaterials (CNMs), and in particular nitrogen-doped CNMs (N-CNMs). In this contest we report the contribution of two different and parallel way to synthetize and test new electrocatalysts for the ORR:
Bimetallic catalysts and metal-free catalysts for ORR / Zafferoni, Claudio; Tuci, Giulia; Giambastiani, Giuliano; Innocenti, Massimo. - ELETTRONICO. - (2015), pp. 962-962. (Intervento presentato al convegno 66th Annual Meeting of the International Society of Electrochemistry (ISE), Green Electrochemistry for Tomorrow’s Society tenutosi a Taipei nel 4/10/15 - 9/10/15).
Bimetallic catalysts and metal-free catalysts for ORR
Zafferoni, Claudio;Giambastiani, Giuliano;
2015
Abstract
Actually platinum is still the most common metal catalyst in both anode and cathode fuel cell. In spite of the many attempts made in the last decade to develop non-Pt based catalysts for low temperature air cathodes, Pt remains the catalyst of choice, at least for acid based fuel cells. The situation in alkaline electrolytes is rather different; due to the stability of non-noble metals in this environment, many more opportunities are available for the development of non-Pt catalysts for the Oxygen Reduction Reaction (ORR) and for the Ethanol Oxidation Reaction (EOR). To completely remove Pt and to replace it with less expensive materials, bimetallic electrocatalysts have been proposed to exploit a synergic mechanism with one metal able to break the O-O bond of the molecular oxygen at the cathode side and the second metal effective in reducing the adsorbed oxygen so formed. An alternative approach to the design of promising electrocatalysts for the fuel cell application is represented by light-heteroelement doped carbon nanomaterials (CNMs), and in particular nitrogen-doped CNMs (N-CNMs). In this contest we report the contribution of two different and parallel way to synthetize and test new electrocatalysts for the ORR:
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