http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Sol-Gel법을 이용한 Cu<sub>x</sub>Co<sub>3-x</sub>O<sub>4</sub> 산소 발생 촉매의 합성 및 전기화학 특성 분석
박유세,정창욱,김치호,구태우,석창규,권일영,김양도,Park, Yoo Sei,Jung, Changwook,Kim, Chiho,Koo, Taewoo,Seok, Changgyu,Kwon, Ilyeong,Kim, Yangdo 한국재료학회 2019 한국재료학회지 Vol.29 No.2
Transition metal oxide is widely used as a water electrolysis catalyst to substitute for a noble metal catalyst such as $IrO_2$ and $RuO_2$. In this study, the sol-gel method is used to synthesize the $Cu_xCo_{3-x}O_4$ catalyst for the oxygen evolution reaction (OER),. The CuxCo3-xO4 is synthesized at various calcination temperatures from $250^{\circ}C$ to $400^{\circ}C$ for 4 h. The $Cu_xCo_{3-x}O_4$ synthesized at $300^{\circ}C$ has a perfect spinel structure without residues of the precursor and secondary phases, such as CuO. The particle size of $Cu_xCo_{3-x}O_4$ increases with an increase in calcination temperature. Amongst all the samples studied, $Cu_xCo_{3-x}O_4$, which is synthesized at 300?, has the highest activity for the OER. Its onset potential for the OER is 370 mV and the overpotential at $10mA/cm^2$ is 438 mV. The tafel slope of $Cu_xCo_{3-x}O_4$ synthesized at $300^{\circ}C$ has a low value of 58 mV/dec. These results are mainly explained by the increase in the available active surface area of the $Cu_xCo_{3-x}O_4$ catalyst.
수소발생반응을 위한 Ni₄Cr 나노 섬유 전기화학 촉매 합성 및 특성 분석
이정훈(Jeong Hun Lee),장명제(Myeong Je Jang),박유세(Yoo Sei Park),최승목(Sung Mook Choi),김양도(Yang Do Kim),이규환(Kyu Hwan Lee) 한국표면공학회 2017 한국표면공학회지 Vol.50 No.5
Hydrogen evolution reaction(HER) was studied over Ni₄Cr nanofibers(NFs) prepared by electrospinning method and oxidation/reduction heat treatment for alkaline water electrolysis. The physicochemical and electrochemical properties such as average diameter, lattice parameter, HER activity of synthesized Ni₄Cr NFs could be modified by proper electrospinning process condition and reduction temperature. It was shown that Ni₄Cr NFs had average diameter from 151 to 273 nm. Also, it exhibited the overpotential between 0.419 V and 0.526 V at 1 mA/㎠ and Tafel slope of -334.75 mV to -444.55 mV per decade in 1 M KOH solution. These results indicate that Ni₄Cr NFs with reduction heat treatment at 600 oC show thinnest diameter and highest HER activity among the other catalysts.