FePc/C and CoPc/C Catalysts for the Oxygen Reduction Reaction as Cathode Catalysts for Alkaline Direct Methanol Fuel Cell

2012 ◽  
Keyword(s):  
Fuel Cell ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Direct Methanol Fuel Cell ◽  
Reduction Reaction ◽  
Cathode Catalysts ◽  
Direct Methanol ◽  
Methanol Fuel Cell

Analysis of Redox Reactions on Pt-Sn based Nano-catalysts for Direct Methanol Fuel Cell Applications

2018 ◽  
Vol 21 (1) ◽  
pp. 021-028 ◽  
Author(s):  
A. Sandoval-González ◽  
S. A. Gamboa
Keyword(s):  
Fuel Cell ◽  
Oxygen Reduction Reaction ◽  
Electric Power ◽  
Oxygen Reduction ◽  
Direct Methanol Fuel Cell ◽  
Oxidation Reaction ◽  
Reduction Reaction ◽  
Methanol Oxidation Reaction ◽  
Direct Methanol ◽  
Methanol Fuel Cell

Low content Pt based catalysts (Pt-Mx, Mx: SnO2, Sn) were prepared by microwave assisted-thermal synthesis. Pt-SnO2/C catalyst showed good performance for methanol oxidation reaction. Besides, Pt1Sn1/C showed good performance for catalyzing the oxygen reduction reaction. The catalysts were characterized structurally by X-ray diffraction and transmission electron microscopy techniques. It was possible to observe the presence of nanoparticles obtained by the synthesis method used in this work. The chemical composition of every material was determined by energy dispersive spectroscopy analysis. The electrochemical characterization of the electrocatalytic materials was carried out in acid medium by cyclic voltammetry and rotating disk electrode techniques. Pt-SnO2/C and Pt1Sn1/C were compared with commercial PtRu/C and Pt/C catalysts respectively. Pt-SnO2/C showed better electrochemical characteristics than commercial PtRu/C for performing the methanol oxidation reaction (MOR). Pt1Sn1/C showed an exchange current density two orders of magnitude higher than commercial Pt/C for performing the oxygen reduction reaction (ORR). The materials were evaluated in an experimental direct methanol fuel cell (DMFC) operating during 10 hours. The electric power density loss showed by the DMFC made with commercial catalysts (PtRu/C and Pt/C) was 67% while the DMFC made with Pt-SnO2/C and Pt1Sn1/C showed an electric power loss ca. 16%. It means that the catalysts synthesized in this work can be considered as good candidates for experimental direct methanol fuel cells.

Effects of using two transition metals in the synthesis of non-noble electrocatalysts for oxygen reduction reaction in direct methanol fuel cell

2018 ◽  
Vol 266 ◽  
pp. 220-232 ◽  
Author(s):  
Luigi Osmieri ◽  
Ricardo Escudero-Cid ◽  
Marco Armandi ◽  
Pilar Ocón ◽  
Alessandro H.A. Monteverde Videla ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Transition Metals ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Direct Methanol Fuel Cell ◽  
Reduction Reaction ◽  
Direct Methanol ◽  
Methanol Fuel Cell

PtPdCo ternary electrocatalyst for methanol tolerant oxygen reduction reaction in direct methanol fuel cell

2014 ◽  
Vol 154-155 ◽  
pp. 309-315 ◽  
Author(s):  
Yoon-Hwan Cho ◽  
Ok-Hee Kim ◽  
Dong Young Chung ◽  
Heeman Choe ◽  
Yong-Hun Cho ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Direct Methanol Fuel Cell ◽  
Reduction Reaction ◽  
Direct Methanol ◽  
Methanol Tolerant ◽  
Methanol Fuel Cell

O2 Reduction Reaction Activity of MN4 Spherical Polymeric Cobalt Porphyrin

2009 ◽  
Vol 610-613 ◽  
pp. 362-366
Author(s):  
Jia Xie ◽  
Ding Guo Xia ◽  
Zhi Hui Yu
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Direct Methanol Fuel Cell ◽  
Reduction Reaction ◽  
Spherical Particles ◽  
Thermal Method ◽  
Oxygen Reduction Reaction Activity ◽  
Direct Methanol ◽  
Electron Reduction ◽  
Methanol Fuel Cell

A novel cathode catalyst for direct methanol fuel cell, MN4 polymeric cobalt tetrametho -xyphenyl porphyrin (PCoTMPP), was prepared by solvent thermal method. The PCoTMPP exhibited spherical particles with diameter of 0.8~1µm. The spherical PCoTMPP showed a good monodisperse. The oxygen reduction reaction activity of PCoTMPP was examined by CV, LSV and CA methods. The results showed that PCoTMPP has a better oxygen reduction reaction activity and stability in comparison with CoTMPP and leads to a four-electron reduction of dioxygen to water.

Improved Electrocatalytic Activity of Oxygen Reduction on Platinum Using Nano-Cobalt in Direct Methanol Fuel Cell Cathode Electrodes

2006 ◽  
Author(s):  
Kimberly McGrath ◽  
Douglas Carpenter
Keyword(s):  
Fuel Cell ◽  
Oxygen Reduction ◽  
Electrocatalytic Activity ◽  
Direct Methanol Fuel Cell ◽  
High Surface ◽  
High Surface Area ◽  
Reduction Reaction ◽  
Open Circuit ◽  
Direct Methanol ◽  
Methanol Fuel Cell

High surface area nanometal particles of nano-cobalt (n-Co) (approx 8 nm particles), produced at QuantumSphere Inc., were blended in various ratios with Pt and Nafion® ionomer, and investigated for their electrocatalytic activity in the oxygen reduction reaction (ORR). The ORR was evaluated by voltammetry using Pt/n-Co blended catalyst on glassy carbon to determine both kinetic activity and as an indicator of direct methanol fuel cell (DMFC) cathode performance. Kinetic enhancement was observed for Pt:n-Co where n-Co is 30–50% (by weight) of the catalyst mixture, including a minimum of 10 mV improvement in the open circuit voltage (OCV). By Tafel slope measurements, it is clear that the mechanism for ORR does not change, however the reaction rate is enhanced by addition of n-Co to Pt in the catalytic ink. For ink compositions similar to those used for standard DMFC cathodes, eliminating 50% of the Pt black resulting in 50% higher energy density while reducing total catalyst cost by roughly 44%.

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