Zobrazeno 1 - 10
of 348
pro vyhledávání: '"Keun-Hwa Chae"'
Autor:
Varsha Singh, Anil Kumar Paidi, Cheol-Hwee Shim, So-Hee Kim, Sung-Ok Won, Jitendra Pal Singh, Sangsul Lee, Keun-Hwa Chae
Publikováno v:
Crystals, Vol 11, Iss 5, p 490 (2021)
For the present work, calcite nanocrystals were grown by annealing precursors at 500 °C. These precursors were obtained by three different thermal schemes. Among these schemes, two involve heating at 100 °C for 16 h and 16 + 24 h, respectively. In
Externí odkaz:
https://doaj.org/article/e95fcc5975174bf2b83b0545f7084818
Publikováno v:
Scientific Reports, Vol 13, Iss 1, Pp 1-15 (2023)
Abstract This study explores influence of charge transfer and X-ray absorption characteristics in aluminum (Al) and copper (Cu) co-doped zinc oxide (ZnO) nanostructures for perovskite solar cell electrodes. Sol-gel technique was employed to synthesiz
Externí odkaz:
https://doaj.org/article/28f61406936948e4b9137817a0d48e0b
Autor:
Ahrom Ryu, Ji-Hun Park, Dong Won Jeon, Jae-Hyeon Cho, Haena Yim, Keun Hwa Chae, Seong H. Kim, Sahn Nahm, Sung Beom Cho, Wook Jo, Ji-Won Choi
Publikováno v:
Journal of Materiomics, Vol 11, Iss 3, Pp 100907- (2025)
Doping and substitution methods are predominantly employed in the synthesis of ceramics to achieve their desired functional properties. We studied the behavior of excessive dopants in addition to an existing stoichiometric composition using a high-th
Externí odkaz:
https://doaj.org/article/f449dd8623d44dfc9459fe47fd5785ba
Autor:
Nguyen Thi Thu Thao, Kwangsoo Kim, Jeong Ho Ryu, Byeong‐Seon An, Arpan Kumar Nayak, Jin Uk Jang, Kyeong‐Han Na, Won‐Youl Choi, Ghulam Ali, Keun Hwa Chae, Muhammad Akbar, Kyung Yoon Chung, Hyun‐Seok Cho, Jong Hyeok Park, Byung‐Hyun Kim, HyukSu Han
Publikováno v:
Advanced Science, Vol 10, Iss 16, Pp n/a-n/a (2023)
Abstract Oxygen evolution reaction (OER) under acidic conditions becomes of significant importance for the practical use of a proton exchange membrane (PEM) water electrolyzer. In particular, maximizing the mass activity of iridium (Ir) is one of the
Externí odkaz:
https://doaj.org/article/aecad61f10334546aa95e9cda1a7ebde
Autor:
Sang Han Park, Abhishek Katoch, Keun Hwa Chae, Sanjeev Gautam, Piter Miedema, Sang Wan Cho, Minseok Kim, Ru-Pan Wang, Masoud Lazemi, Frank de Groot, Soonnam Kwon
Publikováno v:
Nature Communications, Vol 13, Iss 1, Pp 1-9 (2022)
Direct and real-time observation of the excess holes in an element-specific and energylevel-specific manner is a challenging task. Here the authors present a complete hole dynamics of photo-excited anatase TiO2 with 100 femto-second resolution.
Externí odkaz:
https://doaj.org/article/7c0f369caeaa4b41b0ebb7a4cd83c5f7
Publikováno v:
Nature Communications, Vol 13, Iss 1, Pp 1-10 (2022)
The phase and spin state affect catalytic activity of Co-based catalysts for oxygen evolution reaction. Herein, the authors demonstrate a simple reconstruction strategy to fabricate electrodes maintaining a Fe-CoOOH phase and an intermediate-spin sta
Externí odkaz:
https://doaj.org/article/3577b7ebe5dd4972a7c12c5090486473
Publikováno v:
Nanomaterials, Vol 13, Iss 15, p 2222 (2023)
ZnO is a potential candidate for providing an economic and environmentally friendly substitute for energy storage materials. Therefore, in this work, Fe-doped ZnO nanostructures prepared using the microwave irradiation procedure were investigated for
Externí odkaz:
https://doaj.org/article/c3e9e5c967254669b76c54f3276b222b
Improvement of Supercapacitor Performance of In Situ Doped Laser-Induced Multilayer Graphene via NiO
Publikováno v:
Nanomaterials, Vol 13, Iss 14, p 2081 (2023)
Herein, we have reported a novel strategy for improving the electrochemical performance of laser-induced graphene (LIG) supercapacitors (SCs). The LIG was prepared using a CO2 laser system. The polyimide polymer was the source material for the fabric
Externí odkaz:
https://doaj.org/article/de2b3d54468544a1b1988fd893e23afd
Publikováno v:
Nanomaterials, Vol 13, Iss 12, p 1870 (2023)
To meet the growing demand for efficient and sustainable power sources, it is crucial to develop high-performance energy storage systems. Additionally, they should be cost-effective and able to operate without any detrimental environmental side effec
Externí odkaz:
https://doaj.org/article/116d59b37d224b5d8b87ac38f6cc70e0
Autor:
Woong Hee Lee, Young-Jin Ko, Jung Hwan Kim, Chang Hyuck Choi, Keun Hwa Chae, Hansung Kim, Yun Jeong Hwang, Byoung Koun Min, Peter Strasser, Hyung-Suk Oh
Publikováno v:
Nature Communications, Vol 12, Iss 1, Pp 1-10 (2021)
Reversible multifunctionality in electrocatalysts can allow voltage reversal during device operation. Here, authors design a crystalline Ir-based electrocatalyst with a thin reversible metallic-Ir/IrOx layer that shows activity for O2 evolution, H2 e
Externí odkaz:
https://doaj.org/article/d87f5bdf375346f4b582a9af5c0e93c4