Zobrazeno 1 - 10
of 52
pro vyhledávání: '"Yung-Eun Sung"'
Autor:
Yong-Hun Cho, Yung-Eun Sung, Oh Joong Kwon, Sungjun Kim, Jong Min Lee, Hyung-Won Shim, Chi-Yeong Ahn, Young-Shik Kim, Hyuck Jae Choi, Sun Young Kang, Ok-Hee Kim
Publikováno v:
International Journal of Hydrogen Energy. 47:1863-1873
Cell reversal is observed when a current load is applied to the polymer electrolyte membrane fuel cell under fuel starvation conditions. Cell reversal causes severe corrosion (or oxidation) of the carbon support in the anode, which leads to a decreas
Autor:
Yong-Hun Cho, Oh Joong Kwon, Hyun S. Park, Ji Eun Park, Yung-Eun Sung, Sun Young Kang, Wonchan Hwang, Min Her, Ok-Hee Kim, Sungjun Kim, SungBin Park, Chi-Yeong Ahn
Publikováno v:
Chemical Reviews. 121:15075-15140
A substantial amount of research effort has been directed toward the development of Pt-based catalysts with higher performance and durability than conventional polycrystalline Pt nanoparticles to achieve high-power and innovative energy conversion sy
Publikováno v:
Chemical Communications. 55:6389-6392
Single atomic Pt supported on TiC was prepared from chloride Pt precursors, then the chloride ligands were intentionally removed by increasing the reduction temperature. The 0.2 wt% Pt/TiC catalyst reduced at 300 °C had more reduced Pt single-atoms
Autor:
Ji Eun Park, Sun Young Kang, Myung Su Lim, Seung-Hyeon Oh, Young-Hun Cho, Min Her, Jong Kwan Kim, Yung-Eun Sung, Mi-Ju Kim
Publikováno v:
Applied Catalysis B: Environmental. 237:140-148
Graphitic carbon nitride-carbon nanofiber (g-CN-CNF) was synthesized as a bifunctional catalyst in an anion-exchange membrane water electrolyzer (AEMWE), and primary and rechargeable Zn–air cells. The g-CN-CNF catalyst shows high catalytic activity
Autor:
Hwang Jee Youn, Sujin Gok, Ji-Hoon Jang, Oh Joong Kwon, Youngkwang Kim, Eunjik Lee, Taeho Lim, Yung-Eun Sung, Dohyeon Lee
Publikováno v:
ACS applied materialsinterfaces. 12(40)
Methanol crossover is one of the largest problems in direct methanol fuel cells (DMFCs). Methanol passing from the anode to the cathode through the membrane is oxidized at the cathode, degrading the DMFC performance, and the intermediates of the meth
Autor:
Yong Min Kim, Hyeon Seok Lee, Sung-Pyo Cho, Tae Yong Yoo, Jiheon Kim, Taeghwan Hyeon, Jongmin Lee, Arun Kumar Sinha, Megalamane S. Bootharaju, Dong Wook Lee, Byoung-Hoon Lee, Ji Mun Yoo, Euiyeon Jung, Sung Jong Yoo, Yung-Eun Sung, Eungjun Lee, Wytse Hooch Antink
Publikováno v:
Journal of the American Chemical Society. 142(33)
Compared to nanostructured platinum (Pt) catalysts, ordered Pt-based intermetallic nanoparticles supported on a carbon substrate exhibit much enhanced catalytic performance, especially in fuel cell electrocatalysis. However, direct synthesis of homog
Autor:
Hyunjoon Lee, Chi-Yeong Ahn, Sungjun Kim, Ji Eun Park, Wonchan Hwang, Ok-Hee Kim, Min Her, Yung-Eun Sung, Yong-Hun Cho
Publikováno v:
International Journal of Hydrogen Energy. 43:10070-10081
An ideal oxygen reduction catalyst for use in fuel cells should exhibit both long-term durability and high activity. In this study, to increase the durability of highly loaded platinum- and platinum-nickel alloy catalysts possessing different types o
Publikováno v:
International Journal of Hydrogen Energy. 43:10431-10439
In this study, the facile and direct formation of platinum catalyst on a carbon paper (gas diffusion layer) via the sonochemical deposition method is demonstrated. An ultrasound irradiation with a carbon paper substrate in a platinum precursor soluti
Autor:
Sungjun Kim, Ok-Hee Kim, Yung-Eun Sung, Eunsung Lee, Shin-Ae Park, Seonggyu Lee, Min Jeong Kim, Yeongdong Mun, Yong-Hun Cho, Jinwoo Lee, Youngjin Ye, Yong-Tae Kim
Publikováno v:
Applied Catalysis B: Environmental. 222:191-199
We synthesized ordered mesoporous Fe/N/C with highly active Fe-N x /C sites denoted as m-FePhen-C as a non-precious metal catalyst (NPMC) for the oxygen reduction reaction in fuel cells. This was the first study that incorporated a catalyst precursor
Publikováno v:
ChemSusChem. 10:3063-3068
The durability issues of Pt catalyst should be resolved for the commercialization of proton exchange membrane fuel cells. Nanocrystal structures with high-index facets have been recently explored to solve the critical durability problem of fuel cell