Importance of metal-polymer interface for chemoselectivity on Pd supported on S-containing polymer = 황을 포함한 고분자에 담지된 팔라듐 촉매에서 높은 선택도를 위한 금속-고분자 계면 상호작용의 중요성

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Partial hydrogenation of alkyne is one of the important reactions in chemical industry. Many catalysts with organic modifiers showed high selectivity of alkene at the expense of catalytic activity and stability. In the present work, we successfully synthesized stable palladium catalyst supported on the sulfur-containing polymer with both high catalytic activity and selectivity. To identify the unique mechanism for chemoselectivity and the interfacial interaction between metal and the polymer, two catalysts with different positions of metal in the polymer were prepared. We prepared catalysts with metal embedded inside the polymer by the conventional wetness impregnation, and catalysts with the metal located on the polymer surface by adsorption of premade nanoparticles. Interfacial interaction between metal and sulfur moiety on the polymer enabled selective adsorption of alkyne over alkene regardless of metal position. Discriminate adsorption of alkyne resulted in high alkene selectivity (>85%) in various alkyne hydrogenation reactions. Metal located on the surface of the polymer enabled to easily access to reactants than metal located inside the polymer. High accessibility to metal allowed twice-higher catalytic turnover. The combination effect of strong interaction with sulfur on the polymer and easily accessible location of metal enhanced both chemoselectivity and catalytic activity. Our research suggests the possibility of designing optimal catalyst with both high catalytic activity and selectivity by understanding the properties of polymer.
Advisors
Choi, Minkeeresearcher최민기researcher
Description
한국과학기술원 :생명화학공학과,
Publisher
한국과학기술원
Issue Date
2018
Identifier
325007
Language
eng
Description

학위논문(석사) - 한국과학기술원 : 생명화학공학과, 2018.2,[iii, 30 p. :]

Keywords

alkyne partial hydrogenation▼apolymer support▼asulfur▼apoison▼ainterfacial interaction; 알카인 선택적 수소화 반응▼a고분자 담지체▼a황▼a피독▼a계면 상호작용

URI
http://hdl.handle.net/10203/266396
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=867946&flag=dissertation
Appears in Collection
CBE-Theses_Master(석사논문)
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