Journal
NANOSCALE RESEARCH LETTERS
Volume 12, Issue -, Pages -Publisher
SPRINGEROPEN
DOI: 10.1186/s11671-016-1804-z
Keywords
Oxygen reduction; Catalyst; Polyaniline; Montmorillonite
Funding
- Scientific and Technological Research Program of Chongqing Municipal Education Commission [KJ1501118]
- Basic and Frontier Research Program of Chongqing Municipality [cstc2015jcyjA50032, cstc2014jcyjA50038]
- Talent Introduction Project of Chongqing University of Arts and Sciences [R2014CJ02]
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The design of noble-metal-free catalysts for oxygen reduction reaction (ORR) is very important to the commercialization of fuel cells. Here, we use a Co-modified montmorillonite (Co-MMT) as a flat template to prepare Co-and N-doped nanocarbon ORR catalysts derived from carbonization of polyaniline at controlled temperatures. The use of flat template can hinder the agglomeration of polyaniline during pyrolysis process and optimize the N-richactive site density on the surface. The addition of transition metal Co in the flat MMT template can largely promote the formation of Co-N sites in prepared catalyst, facilitating the effective improvement of catalytic activity towards the ORR with a direct four-electron transfer pathway. The excellent ORR activity may be mainly attributed to high contents of graphitic N, pyridinic-N, and Co-N configurations. This study opens a new way to rationally design cheap and active ORR catalysts by using simple flat compound as a direct template.
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