Selective activation of methane using single-atom catalyst of supported precious metals for direct conversion = 메탄 직접 전환을 위한 귀금속 단원자 촉매의 선택적 메탄 활성화

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Direct methane conversion into value-added products becomes more important. Due to inertness of methane, cleaving the first C-H bond has been very difficult requiring high reaction temperature on the heterogeneous catalysts. Once the first C-H bond becomes activated, the remaining C-H bonds are successively dissociated on the metal surface, hindering the direct methane conversion into chemicals. Here, a single-atom catalyst of precious metals dispersed on $ZrO_2$ surface has been synthesized and used for selective activation of methane. The single-atomic nature was confirmed by extended X-ray fine structure analysis, electron microscopy images, and diffuse reflectance infrared Fourier transform spectroscopy. A model of the single-atom $Rh/ZrO_2$ catalyst was constructed by density functional theory calculations, and it was shown that $CH_3$ intermediates can be energetically stabilized on the single-atom catalyst. The direct conversion of methane into methanol was performed using $H_2O_2$ as an oxidant in the aqueous solution. Whereas Rh nanoparticles produced $CO_2$ only, the single-atom Rh catalyst produced methanol. Direct conversion of methane into ethane was performed in gas-phase reaction.
Advisors
Lee, Hyunjooresearcher이현주researcher
Description
한국과학기술원 :생명화학공학과,
Publisher
한국과학기술원
Issue Date
2018
Identifier
325007
Language
eng
Description

학위논문(박사) - 한국과학기술원 : 생명화학공학과, 2018.2,[vii, 67 p. :]

Keywords

C1 gas▼amethane▼amethanol▼aethane▼asingle-atom catalyst▼aselective oxidation reaction; C1 가스▼a메탄▼a메탄올▼a에탄▼a단원자촉매▼a선택적산화반응

URI
http://hdl.handle.net/10203/264887
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=734326&flag=dissertation
Appears in Collection
CBE-Theses_Ph.D.(박사논문)
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