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The first observation of Ni nanoparticle exsolution from YSZ and its application for dry reforming of methane

Materials Reports(Energy) 2021年第2期1卷 70-76页

作者： Sangwook Joo chaehyun lim Ohhun Kwon Linjuan Zhang Jing Zhou Jian-Qiang Wang Hu Young Jeong Yong-wook Sin Sihyuk Choi Guntae Kim Department of Energy Engineering Ulsan National Institute of Science and Technology(UNIST)Ulsan698-798Republic of Korea Key Laboratory of Interfacial Physics and Technology Shanghai Institute of Applied PhysicsChinese Academy of SciencesShanghai201800PR China UNIST Central Research Facilities and School of Materials Science and Engineering Ulsan National Institute of Science and Technology(UNIST)Ulsan44919Republic of Korea Materials&Devices Advanced Research Institute LG ElectronicsSeoulRepublic of Korea Department of Mechanical Engineering Kumoh National Institute of TechnologyGyeongbuk39177Republic of Korea

Ni nanocatalysts produced through exsolution have shown strong resistance to particle sintering and carbon coking in a beneficial dry reforming of methane(DRM)reaction utilizing greenhouse gases such as CH_(4)and CO_(2).However,most of the existing oxide supports for exsolution have been limited to perovskite oxide,while studies on fluorite support have been rarely conducted due to the limited solubility despite its excellent redox *** we demonstrate that 3 mol%Ni can be successfully dissolved into the yttria-stabilized zirconia(YSZ)lattice and be further exsolved to the surface in a reducing *** YSZ decorated with exsolved Ni nanoparticles shows enhanced catalytic activity for DRM reaction compared to the conventional cermet type of bulk ***,the catalytic activity is extremely stable for about 300 h without significant *** results suggest that the YSZ-based fluorite structure can be utilized as one of the support oxides for exsolution.

关键词： Dry forming of methane Exsolution Yttria-stabilized zirconia(YSZ) Ni nanoparticle

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Highly pixelated,untethered tactile interfaces for an ultra-flexible on-skin telehaptic system

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npj Flexible Electronics 2022年第1期6卷 809-819页

作者： Hanbit Jin Yunjeong Kim Wooseup Youm Yulim Min Saerom Seo chaehyun lim Chan-Hwa Hong Seyoung Kwon Gyeongseok Park Steve Park Hye Jin Kim Electronics and Telecommunications Research Institute(ETRI) DaejeonKorea Korea University of Science and Technology(UST) DaejeonKorea Korea Advanced Institute of Science and Technology(KAIST) DaejeonKorea

Realizing highly immersive tactile interactions requires a skin-integrated,untethered,high-definition tactile transducer devices that can record and generate tactile ***,the rigid and bulky form factor,and insufficient resolution of existing actuators are hindering the reproduction of sophisticated tactile sensations and immersive user ***,we demonstrate an ultraflexible tactile interface with high spatial resolution of 1.8 mm for telehaptic communication on human *** mechanism sensors and sub-mm scale piezoceramic actuators are designed to record and generate the static and dynamic pressures in a wide frequency range(1 Hz to 1 kHz).Moreover,actuators are integrated on ultra-flexible substrate with chessboard pattern to minimize stress during mechanical ***,remote transmissions of various tactile stimuli,such as shapes,textures,and vibration patterns were demonstrated by the telehaptic system with low latency(<1.55 ms)and high fidelity as proven by the shorttime Fourier-transform analysis.

关键词： tile system Highly

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