Zobrazeno 1 - 10
of 12
pro vyhledávání: '"Ryeo Yun Hwang"'
Autor:
Ryeo Yun Hwang, Oc Hee Han
Publikováno v:
Electrochemistry Communications, Vol 148, Iss , Pp 107417- (2023)
Understanding the electrochemical reaction mechanisms of energy conversion and storage systems is essential for improving their performance. Nuclear magnetic resonance (NMR) spectroscopy is an excellent quantitative and qualitative analysis method fo
Externí odkaz:
https://doaj.org/article/8f67f195b9244c49bf98dea06d7e8b33
Publikováno v:
ACS macro letters. 5(7)
Polymer electrolyte membranes (PEMs) are representative systems for the study of the proton conduction mechanism and water dynamics in nanopores/channels. Our
Publikováno v:
Journal of Electroanalytical Chemistry. 932:117268
Autor:
Ryeo Yun Hwang, Dukjoon Kim, Soonchil Lee, Jiwon Kim, Yeonho Ahn, Oc Hee Han, Daniel K. Park, Seung-Bo Saun
Publikováno v:
ACS Macro Letters. 9:1013-1018
The ionic conductivity of polymer electrolyte membranes (PEMs) is an essential parameter for their device applications. In water-swollen PEMs, protons and other ions are transferred through hydrophilic channels of a few nanometers in diameter at most
Publikováno v:
Bulletin of the Korean Chemical Society. 37:2050-2053
Publikováno v:
Journal of Electroanalytical Chemistry. 775:320-324
Taking advantage of nuclear magnetic resonance (NMR) spectroscopy to easily identify and quantify chemicals, electrochemical reactions in direct methanol fuel cells (DMFCs) are investigated here by NMR analyses of cathode and anode exhausts. Deuteriu
Publikováno v:
ACS Macro Letters. 5:801-804
Polymer electrolyte membranes (PEMs) are representative systems for the study of the proton conduction mechanism and water dynamics in nanopores/channels. Our 1H nuclear magnetic resonance data for Nafion PEMs, which are subjected to thermal degradat
Autor:
Myeong Hee Lee, Han Saem Park, Byeong Su Kim, Ryeo Yun Hwang, Hyun-Kon Song, Kiyoung Jo, Taemin Lee, Ok Kyung Park
Publikováno v:
Nano Energy. 3:1-9
Herein, we report on electrochemical doping of a conducting polymer (CP) with anionically modified graphene nanosheets. The architecture built from reduced graphene oxide (rGO) skeleton skinned by polypyrrole (pPy) enhanced supercapacitor performance
Publikováno v:
Bulletin of the Korean Chemical Society. 34:2959-2962
As the concentration of aqueous solutions was decreased, the OD peaks in NMR spectra grew relative to the peaks. Isotope impurity for OH groups of and deuterium naturally present in water contributed to the OD peaks. Using these peak area data, the s
Publikováno v:
Journal of Electroanalytical Chemistry. 657:181-186
Loss of electroactive dopants from conducting polymers (CPs) was investigated by electrochemical quartz crystal microgravimetry (EQCM). pPy[ABTS], polypyrrole doped with ABTS (2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonate), was used as a model