Ordered nanoporous arrays of carbon supporting high dispersions of platinum nanoparticles

Sang Hoon Joo, Seong Jae Choi, Ilwhan Oh, Juhyoun Kwak, Zheng Liu, Osamu Terasaki and Ryong Ryoo ()
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Sang Hoon Joo: Korea Advanced Institute of Science and Technology
Seong Jae Choi: Korea Advanced Institute of Science and Technology
Ilwhan Oh: Electrochemistry Laboratory, Korea Advanced Institute of Science and Technology
Juhyoun Kwak: Electrochemistry Laboratory, Korea Advanced Institute of Science and Technology
Zheng Liu: CREST, Japan Science and Technology Corporation, Tohoku University
Osamu Terasaki: CREST, Japan Science and Technology Corporation, Tohoku University
Ryong Ryoo: Korea Advanced Institute of Science and Technology

Nature, 2001, vol. 412, issue 6843, 169-172

Abstract: Abstract Nanostructured carbon materials are potentially of great technological interest for the development of electronic1,2, catalytic3,4 and hydrogen-storage systems5,6. Here we describe a general strategy for the synthesis of highly ordered, rigid arrays of nanoporous carbon having uniform but tunable diameters (typically 6 nanometres inside and 9 nanometres outside). These structures are formed by using ordered mesoporous silicas as templates, the removal of which leaves a partially ordered graphitic framework. The resulting material supports a high dispersion of platinum nanoparticles, exceeding that of other common microporous carbon materials (such as carbon black, charcoal and activated carbon fibres). The platinum cluster diameter can be controlled to below 3 nanometres, and the high dispersion of these metal clusters gives rise to promising electrocatalytic activity for oxygen reduction, which could prove to be practically relevant for fuel-cell technologies. These nanomaterials can also be prepared in the form of free-standing films by using ordered silica films as the templates.

Date: 2001
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DOI: 10.1038/35084046

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