News Column

Study Findings from Sejong University Broaden Understanding of Chalcogens

May 16, 2014

By a News Reporter-Staff News Editor at Science Letter -- Current study results on Chalcogens have been published. According to news reporting originating from Seoul, South Korea, by NewsRx correspondents, research stated, "Ordered mesoporous carbons (OMCs) are investigated as support materials for Pt catalysts for oxygen reduction reaction (ORR). Three types of OMCs (CMK-3, CMK-3G, and CMK-5) are prepared by a nanocasting method using ordered mesoporous silica, SBA-15, as a template."

Our news editors obtained a quote from the research from Sejong University, "These OMCs with the same hexagonal mesostructure have different carbon frameworks and graphiticity, which can affect their surface area and microporosity. Pt nanoparticles with an average size of 1 nm are uniformly supported on the three OMCs and Ketjenblack ® and their electrochemical performance and durability are evaluated. Pt/CMK-3G exhibits the highest electrochemically active surface area, kinetic current density, mass activity, and half-wave potential, whereas Pt/CMK-3 shows the lowest values. Pt/CMK-3G also shows the highest ORR activity after an accelerated durability test, with a minimal shift in half-wave potential. The higher ORR activity of Pt/CMK-3G is attributed to the formation of highly crystalline Pt particles as well as its highly graphitic, crystalline carbon structure, which causes the weak adsorption of surface oxide and a strong interaction between the Pt particles and the support."

According to the news editors, the research concluded: "Moreover, we can establish that the mass activity of the catalysts is nearly inversely proportional to the micropore volume of the carbon supports."

For more information on this research see: Impact of framework structure of ordered mesoporous carbons on the performance of supported Pt catalysts for oxygen reduction reaction. Carbon, 2014;72():354-364. Carbon can be contacted at: Pergamon-Elsevier Science Ltd, The Boulevard, Langford Lane, Kidlington, Oxford OX5 1GB, England. (Elsevier -; Carbon -

The news editors report that additional information may be obtained by contacting N.I. Kim, Sejong University, Dept. of Energy & Mineral Resources Engn, Seoul 143747, South Korea. Additional authors for this research include J.Y. Cheon, J.H. Kim, J. Seong, J.Y. Park, S.H. Joo and K. Kwon (see also Chalcogens).

Keywords for this news article include: Asia, Seoul, Chalcogens, South Korea

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Source: Science Letter

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