Journal article
Embedding platinum-based nanoparticles within ordered mesoporous carbon using supercritical carbon dioxide technique as a highly efficient oxygen reduction electrocatalyst
Journal of alloys and compounds, Vol.741, pp.580-589
04/15/2018
Abstract
Ordered mesoporous carbon (OMC) has shown great promising as superior support in the creating highly efficient and stable cathodic catalyst for oxygen reduction reaction (ORR) due to its many merits but there are still many challenges. We demonstrate in this work a facile and large-scale strategy to efficiently embed Pt-based crystals within OMC using supercritical carbon dioxide (scCO(2)) technique. Typically, PtFe/OMC catalysts with the highly dispersive, ultrafine sizes (1.3-2.3 nm), controllable compositions and loadings have been successfully fabricated. Through control of experimental process and loadings, most of crystals can be deposited into mesochannels of OMC. The integration of highly dispersive and ultrafine PtFe crystals as well as high surface area, mesoporous structure and good electrical conductivity of OMC supports make PtFe/OMC promising as active and stable electrocatalysts toward ORR. By careful comparison, PtFe/OMC catalysts show the overwhelmingly better or comparable electrochemical performance compared with previously reported mesoporous carbon supported Pt-based catalysts. These attractive materials hold great potential in cathodic electrocatalyst for fuel cells and the scCO(2) technique is quite superior for constructing OMC with various embedded nanoparticles (such as PtPd, PtCu etc.) (C) 2018 Elsevier B.V. All rights reserved.
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Details
- Title
- Embedding platinum-based nanoparticles within ordered mesoporous carbon using supercritical carbon dioxide technique as a highly efficient oxygen reduction electrocatalyst
- Creators
- Yazhou Zhou - Washington State UniversityChengzhou Zhu - Washington State UniversityGuohai Yang - Washington State UniversityDan Du - Washington State UniversityXiaonong Cheng - Jiangsu UniversityJuan Yang - Jiangsu UniversityYuehe Lin - Washington State University
- Publication Details
- Journal of alloys and compounds, Vol.741, pp.580-589
- Academic Unit
- School of Mechanical and Materials Engineering
- Publisher
- Elsevier
- Number of pages
- 10
- Grant note
- 51572114; 51672112; 51702129 / National Natural Science Foundation of China; National Natural Science Foundation of China (NSFC) Washington State University (WSU)
- Identifiers
- 99901227647001842
- Language
- English
- Resource Type
- Journal article