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Nonprecious metal catalysts for the molecular oxygen‐reduction reaction
Author(s) -
Feng Yongjun,
AlonsoVante Nicolas
Publication year - 2008
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200879537
Subject(s) - catalysis , methanol , electrochemistry , fuel cells , electrolyte , metal , oxygen reduction reaction , methanol fuel , chemistry , oxygen reduction , inorganic chemistry , redox , materials science , chemical engineering , combinatorial chemistry , electrode , organic chemistry , engineering
Abstract This review covers the electrocatalytic activities, the corresponding influence factors and the synthesis methods of nonprecious‐metal electrocatalysts towards oxygen‐reduction reaction (ORR) for fuel‐cell systems. In particular, the chalcogenides and the macrocycles containing Co or Fe metals have been focused upon. Due to the scarcity of Pt metal, the Co‐ and Fe‐based chalcogenides are potentially interesting substitutes of Pt although they still show lower catalytic activities for ORR and lower electrochemical and chemical stability in the present fuel‐cell electrolytes. Compared to Pt electrocatalysts, the Co‐ and Fe‐based macrocycles, such as TMPP, TPP, Pc and TAA, are among the most promising substitutes for Pt because of their comparable catalytic activities towards ORR and the higher insensitivity to methanol (in direct methanol fuel cells – DMFC) although they still have some drawbacks, namely lower stability and shorter durability. Novel catalyst synthesis methods, modification techniques of catalysts as well as supporting substrates are expected to be developed in the future to satisfy the requirements of commercial fuel cells. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)