Zobrazeno 1 - 10
of 16
pro vyhledávání: '"Bumwook Roh"'
Autor:
Digby D. Macdonald, Bumwook Roh
Publikováno v:
Journal of Solid State Electrochemistry. 23:2863-2879
A simplified Point Defect Model incorporating reversible oxygen vacancy generation/annihilation at the metal/film interface has been used to investigate the impedance of anodized titanium in 0.5 M H2SO4, the oxygen vacancy profile in the anodic titan
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::77b7bedc32333a10e7b9f4a5ec13bf82
https://doi.org/10.1007/s10008-019-04363-w
https://doi.org/10.1007/s10008-019-04363-w
Autor:
Digby D. Macdonald, Bumwook Roh
Publikováno v:
Journal of Solid State Electrochemistry. 23:2001-2008
The thickness of the anodic titanium oxide film formed on titanium in 0.5 M H2SO4 at 22 °C was measured by ellipsometry, and the Forouhi interband single-layer model was used to analyze the data. The anodizing constant was determined experimentally
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bfa1009be43fdc7f241c52cae2e5d7a8
https://doi.org/10.1007/s10008-019-04255-z
https://doi.org/10.1007/s10008-019-04255-z
Autor:
Bumwook Roh, Digby D. Macdonald
Publikováno v:
Journal of Solid State Electrochemistry. 23:1967-1979
The kinetic parameters of the formation of the anodic titanium oxide film on Ti in 0.5 M H2SO4 have been determined using potentiostatic polarization, electrochemical impedance spectroscopy (EIS), and the Mott-Schottky analysis (MSA). The findings ar
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::88d248143fa7d51f72345e8acf3b4135
https://doi.org/10.1007/s10008-019-04254-0
https://doi.org/10.1007/s10008-019-04254-0
Publikováno v:
Journal of Applied Electrochemistry. 44:1219-1223
The carbon-supported PdCo@Pt core–shell nanoparticles for an oxygen reduction reaction (ORR) were prepared via a two-step process at room temperature. The as-prepared PdCo@Pt/C with an average particle size of ~3.5 nm exhibited a well-defined nanos
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6d14999ab8ffbc26c4cc65a1ec6ca120
https://doi.org/10.1007/s10800-014-0738-3
https://doi.org/10.1007/s10800-014-0738-3
Autor:
Young-Woo Lee, Seong-Bae Kim, Kyung-Won Park, Inchul Hwang, Jongmin Lee, Bumwook Roh, Do-Young Kim, Sang-Beom Han
Publikováno v:
Applied Catalysis B: Environmental. :200-207
TiN@C nanostructure supports consist of TiN as a core prepared at 900 °C in NH 3 and carbon as a shell by heat treatment of the TiN at 900 °C in CH 4 for 1, 3, and 6 h (referred as TiN@C-1 h, TiN@C-3 h, and TiN@C-6 h). The thickness of the carbon s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7a4d0a53e1e9e1d2a86019b7ed42e58c
https://doi.org/10.1016/j.apcatb.2011.09.036
https://doi.org/10.1016/j.apcatb.2011.09.036
Autor:
Jongmin Lee, Jy-Yeon Kim, Young-Woo Lee, Bumwook Roh, Kyung-Won Park, Inchul Hwang, Sang-Beom Han, A-Ra Ko
Publikováno v:
Carbon. 48:2290-2296
Nanostructures consisting of TiO 2 particles as a core and carbon as a shell (TiO 2 @C) were prepared by heat treatment of TiO 2 nanoparticles at 700 or 900 °C in a methane atmosphere. X-ray diffraction and transmission electron microscopy showed th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a0fb51f55c53ac23a86d683f758ea8f4
https://doi.org/10.1016/j.carbon.2010.03.004
https://doi.org/10.1016/j.carbon.2010.03.004
Autor:
Kyung-Won Park, Jy-Yeon Kim, Bumwook Roh, Woojin Choi, You-Jung Song, Sang-Beom Han, Inchul Hwang, Jongmin Lee
Publikováno v:
Applied Catalysis A: General. 375:149-155
We report nanostructured supports prepared by heat treatment of TiO 2 nanoparticles at 700, 800, or 900 °C under ammonia atmosphere. From X-ray diffraction analysis, it is found that the phase transformation of the supports from antase and rutile Ti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2258d100df4fb3d5d83420ef8eb12c69
https://doi.org/10.1016/j.apcata.2009.12.037
https://doi.org/10.1016/j.apcata.2009.12.037
Publikováno v:
Electrochimica Acta. 54:6515-6521
The corrosion resistance of carbon black, carbon nanofiber and carbon nanocage used as catalyst supports in fuel cells was investigated by monitoring CO2 emission using on-line mass spectrometry when 1.4 V was applied for 30 min. The changes associat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b4db295ace9984ba987d1efae25e449c
https://doi.org/10.1016/j.electacta.2009.06.028
https://doi.org/10.1016/j.electacta.2009.06.028
Autor:
Inchul Hwang, Hyung Suk Oh, Seungjoo Haam, Hansung Kim, Kundu Arunabha, Jong Gil Oh, Bumwook Roh
Publikováno v:
Electrochemistry Communications, Vol 10, Iss 7, Pp 1048-1051 (2008)
The electrochemical corrosion of carbon catalyst supports in polymer electrolyte membrane (PEM) fuel cells is investigated by monitoring the generation of CO2 using an on-line mass spectrometer at a constant potential of 1.4 V. Our results suggest th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b4cc315c93166bf93562ac599968a518
https://doi.org/10.1016/j.elecom.2008.05.006
https://doi.org/10.1016/j.elecom.2008.05.006
Autor:
Bumwook Roh, Digby D. Macdonald
Publikováno v:
ECS Transactions. 3:57-68
The role of oxygen vacancies on the kinetics of the oxygen electrode reaction on passivated metal surfaces is an issue of considerable theoretical and practical importance in the development of new electrocatalysts for both oxygen evolution and oxyge
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8844872e3fdf49923d1a55c4c6f07f80
https://doi.org/10.1149/1.2789270
https://doi.org/10.1149/1.2789270