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- 저자 : Julie Anne D. del Rosario (검색결과 2 건)
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del Rosario, Julie Anne D.,Ocon, Joey D.,Jeon, Hongrae,Yi, Youngmi,Lee, Jae Kwang,Lee, Jaeyoung American Chemical Society 2014 The Journal of Physical Chemistry Part C Vol.118 No.39
<P>Direct ethanol fuel cells (DEFCs) have been widely studied because of their potential as a high-energy density and low-toxicity power source of the future. Suitable catalysts for the anode reaction, however, are necessary to fully utilize the advantages of DEFCs. In this paper, we fabricated nickel (Ni)–palladium (Pd) bimetallic catalysts with a bilayer structure, using sputtering deposition on a titanium (Ti) foil substrate, and investigated the activity and stability of the catalysts toward ethanol electro-oxidation in alkaline media. Our results suggest that while Pd is the active component and Ni has negligible activity toward ethanol oxidation, Ni-modified Pd (NiPd/Ti) provides the best activity in comparison to PdNi/Ti and the monometallic catalysts. In fact, optimizing the Ni amount could lead to a highly active and stable bimetallic electrocatalyst because of Ni’s ability to increase the active surface area of the Pd layer, provide hydroxyl species to replenish the active sites, and act as a protective layer to the Pd. Overall, these results provide a better understanding on the role of Ni in bimetallic catalysts, especially in a bilayer configuration, to allow the use of an ethanol oxidation reaction (EOR)-active electrocatalyst with a much lower Pd content.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/jpccck/2014/jpccck.2014.118.issue-39/jp411601c/production/images/medium/jp-2013-11601c_0008.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/jp411601c'>ACS Electronic Supporting Info</A></P>
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Lessons from Korean Innovation Model for ASEAN Countries Towards a Knowledge Economy
Joey D. Ocon,Doungkamon Phihusut,Julie Anne D. del Rosario,Trinh Ngoc Tuan,Jaeyoung Lee 과학기술정책연구원 2013 STI Policy Review Vol.4 No.2
The Association of Southeast Asian Nations (ASEAN) achieved relatively rapid economic growth over the past decade. Sustainable growth among member states, however, is put into question due to macroeconomic challenges, political risk, and vulnerability to external shocks. Developed countries, in contrast, have turned into less labor-intensive technologies to further expand their economies. In this paper, we review the science, technology, and innovation (STI) policies and statuses of the scientific and technological capabilities of the ASEAN member countries. Empirical results based on STI indicators (R&D spending, publications, patents, and knowledge economy indices) reveal considerable variation between the science and technology (S&T) competence and effectiveness of STI policies of ASEAN members. We have categorized nations into clusters according their situations in their S&T productivity. Under the Korean Innovation Model, Cambodia, Laos, Myanmar, and Brunei are classified as being in the institutional-building stage, while Malaysia, Thailand, Indonesia, the Philippines, and Vietnam in the catch up stage, and Singapore in the post-catch up stage. Finally, policy prescriptions on how to enhance the S&T capabilities of the developing ASEAN countries, based on the South Korea development experience, are presented.
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