(A) novel electrochemical system with a permeable CNT membrane for facile conversion of $CO_2$탄소나노튜브 투과전극을 이용한 전기화학적 이산화탄소 전환 향상

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dc.contributor.advisorKang, Seoktae-
dc.contributor.advisor강석태-
dc.contributor.authorLee, Mi-Young-
dc.date.accessioned2021-05-11T19:44:31Z-
dc.date.available2021-05-11T19:44:31Z-
dc.date.issued2020-
dc.identifier.urihttp://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=908377&flag=dissertationen_US
dc.identifier.urihttp://hdl.handle.net/10203/283619-
dc.description학위논문(박사) - 한국과학기술원 : 건설및환경공학과, 2020.2,[ix, 160 p. :]-
dc.description.abstractElectrocatalytic $CO_2$ reduction (e$CO_2$R) has been highlighted as a novel strategy to mitigate the emission of $CO_2$ and to store renewable energy as a form of organic fuels simultaneously. In this study, $SnO_x$-doped carbon nanotubes were fabricated to the conductive and permeable hollow-fiber electrodes (Sn-CHM), and operated in gas-phase mode to overcome the dependence of catalysts on precious metals (e.g., silver, gold) and the low current density, which represents reaction rate during the CO production from the e$CO_2$R. Due to the enhanced $CO_2$ mass transport in gas-phase operation compared to conventional liquid-phase mode, Sn-CHM achieved the highest CO selectivity and current density among previously reported Sn-based electrodes. From the computational calculation based on the density functional theory (DFT), the highly charged surface of the Sn-CHM as a result of even distribution of SnOx particles on CNT structures significantly reduced the adsorption energy and stabilized key intermediates of the e$CO_2$R for CO production. The highest conversion efficiency and current density for syngas production among non-noble metals based catalysts were achieved by controlling operational parameters including $SnO_x$ loading, flow rate of $CO_2$ gas, and pH of electrolyte in the e$CO_2$R, and this was achieved under low overpotential comparing to noble metals.-
dc.languageeng-
dc.publisher한국과학기술원-
dc.subjectElectrocatalytic $CO_2$ reduction▼aPermeable electrode▼aLiquid-phase electrolysis▼aGas-phase electrolysis▼aSyngas-
dc.subject전기화학적 이산화탄소 전환▼a투과성 전극▼a액상 반응▼a기체상 반응▼a합성가스-
dc.title(A) novel electrochemical system with a permeable CNT membrane for facile conversion of $CO_2$-
dc.title.alternative탄소나노튜브 투과전극을 이용한 전기화학적 이산화탄소 전환 향상-
dc.typeThesis(Ph.D)-
dc.identifier.CNRN325007-
dc.description.department한국과학기술원 :건설및환경공학과,-
dc.contributor.alternativeauthor이미영-
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CE-Theses_Ph.D.(박사논문)
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