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Hydrogen bubble-assisted growth of Pt3Te4 for electrochemical catalysts
배동연,김정효,권하경,원동연,Lin Chia-Hsien,Chiang Ching-Yu,Ku Ching-Shun,박가람,정석민,양희준,조수연 한국물리학회 2021 Current Applied Physics Vol.30 No.-
Novel materials and structures with abundant active sites have been in continuous demand for electrochemical catalytic applications. In this study, we synthesized platinum telluride (Pt3Te4) nanocrystals on two-dimensional metallic molybdenum ditelluride (MoTe2) using a dynamic hydrogen bubble template method in the hydrogen evolution reaction (HER). The local crystal structure and chemical state of the Pt3Te4 nanocrystals were investigated using X-ray nano-diffraction and X-ray nano-absorption spectroscopy. In our electrochemical deposition method, the morphology, and HER performance of the Pt3Te4 nanocrystals could be manipulated through the hydrogen bubble generation rate. Thus, the nanorod-shaped Pt3Te4 nanocrystals, fabricated by a high rate of hydrogen bubble generation, exhibited outstanding HER performance, which is in contrast with the HER performance of hemisphere-shaped Pt3Te4. Our study provides a facile and systematic way of synthesizing highperformance electrochemical catalysts using the hydrogen bubble-assisted growth method.
배동관(D.K.Bae),안재영(J.Y.Ahn),김광헌(K.H.Kim) 전력전자학회 2003 전력전자학술대회 논문집 Vol.2003 No.7(1)
A use of micro processor having μ-com functions is gradually increased, and This paper describes the digital servo controller applied to linear pulse motor. The TMS320LF2407, made by TI(Texas Instruments Co.), is used as a arithmetic unit in control circuit, designed for motor drive and available for the implement of high performance and miniaturization. Also, it can allow the sufficient debugging and downloading into control board for independent operation. A current control in order to carry out a position control is of a digital current control mode, and its implement confirmed the servo control performance of position control.
HB형 선형 펄스모터의 추력 계산법의 비교 및 측정장치 설계
배동관(D.K.Bae),김광현(K.H.Kim),박현수(H.S.park) 전력전자학회 2003 전력전자학술대회 논문집 Vol.2003 No.7(1)
The linear motor available for linear transition motion, because of Its advantages, the motor design and its application have gradually increased, but the quantitative measurement system of thrust force has not been generalized. So, this paper proposes the modeling, computation method, and measurement system of linear thrust force m HB-type linear pulse motor As the computation method of thrust force m linear motor is presented and the measurement system is designed, and<br/> manufactured, It would be verified that reliability of measurement method and measurement system, considering on and comparing the results of mathematical modeling with measured values of static thrust force and dynamic one.
뉴로-퍼지이론을 이용한 리니어 펄스 모터의 새로운 저진동 정밀제어 알고리즘
배동관(Dong-Kwan Bae),박경빈(Kyung-Bin Park),이양규(Yang-Guy Lee),김광헌(Kwang-Heon Kim),박현수(Hyun-Soo Park) 전력전자학회 2001 전력전자학술대회 논문집 Vol.2001 No.7
This paper describes the method of vibration supprssion on a control algorithm using Neuro-Fuzzy Theory in Linear Pulse Motor (LPM) The total thrust force is distorted by magnetic and coil flux, and we classify the harmonic parts of it. A modulated current from harmonic components of static thrust characteristics of LPM compensates with reference current to total thrust force. Low vibration is obtatained by the method of current compensation using ANFIS.