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Three‐Dimensional Macroporous NiCo 2 O 4 Sheets as a Non‐Noble Catalyst for Efficient Oxygen Reduction Reactions
Author(s) -
Xiao Ying,
Hu Chuangang,
Qu Liangti,
Hu Changwen,
Cao Minhua
Publication year - 2013
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201302193
Subject(s) - catalysis , electrocatalyst , noble metal , methanol , materials science , chemical engineering , oxygen reduction reaction , oxygen , oxygen reduction , mass transport , chemistry , electrode , electrochemistry , organic chemistry , engineering , engineering physics
A facile and low‐cost strategy is developed to prepare three‐dimensional (3D) macroporous NiCo 2 O 4 sheets, which can be used as a highly efficient non‐noble metal electrocatalyst for the oxygen reduction reaction (ORR) in alkaline conditions. The as‐obtained sheets have a thickness of about 150 nm and feature a typical 3D macroporous structure with pore volumes of up to 0.23 cm 3 g −1 , which could decrease the mass transport resistance and allow easier access of the reactants to the active surface sites. The as‐prepared macroporous NiCo 2 O 4 sheets exhibit high electrocatalytic activity for ORR with a four‐electron pathway, good long‐term stability and high tolerance against methanol. The unique 3D macroporous structure and intrinsic properties may be responsible for their high performance.