Synthesis and Electrochemical Characterization of Co, Cu, Fe, Ni and Mn-Based Catalysts for ORR in PEM Fuel Cells

Autor:	Ashesh Belapure, Gabriel A. Goenaga, Jeremy A. Brooksbank, Shane Foister, Thomas A. Zawodzinski, Alexander B. Papandrew, Chinmay Dabke
Rok vydání:	2013
Předmět:	Reaction rate Materials science Chemical engineering Proton exchange membrane fuel cell Precious metal Limiting Electrochemistry Limited resources Relative stability Catalysis
Zdroj:	ECS Transactions. 50:1749-1757
ISSN:	1938-6737 1938-5862
DOI:	10.1149/05002.1749ecst
Popis:	We have synthesized a variety of transition metal-ligand complexes supported on carbon black to be used as catalysts for PEMFC cathode electrodes. Complexes of Cu, Co, Fe, Ni and Mn with triazole ligands such as diaminotriazole (DATZ), phthalocyanine (Pc) and pyridine were either adsorbed or covalently attached via diazonium coupling to BP2000 carbon support. Electrochemical activity was investigated via rotating ring disk electrode experiments (RRDE). The as-prepared materials showed low catalytic activity towards the oxygen reduction reaction (ORR). All of our samples demonstrated improved catalytic activity after pyrolysis in an inert atmosphere at temperatures above 600 oC. In general, adsorbed complexes showed lower catalytic activity than immobilized ones. In addition, complexes using Pc ligand presented higher catalytic activity and current densities than DATZ based materials. Catalysts using Co and Cu as the metal centers showed the best onset potentials after the heat treatment.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::f5d858bf2c4a6837142d8a3fd04a7fd0 https://doi.org/10.1149/05002.1749ecst Zobrazit plný text záznamu