서브메뉴
검색
Spatial Control in Multi-step, Multi-catalyst Organometallic and Electrochemical Processes
Spatial Control in Multi-step, Multi-catalyst Organometallic and Electrochemical Processes
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20250211152210
- ISBN
- 9798382837284
- DDC
- 546
- 서명/저자
- Spatial Control in Multi-step, Multi-catalyst Organometallic and Electrochemical Processes
- 발행사항
- [Sl] : University of California, Los Angeles, 2024
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2024
- 형태사항
- 233 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 85-12, Section: B.
- 주기사항
- Advisor: Liu, Chong.
- 학위논문주기
- Thesis (Ph.D.)--University of California, Los Angeles, 2024.
- 초록/해제
- 요약Multi-step processes, such as catalytic cycles, proceed through one or more intermediates that may participate in unwanted side reactions, leading to inefficiency and waste. Further, these intermediates may have a short shelf life and/or pose a safety concern. Thus, the development of methods to carry out multi-step processes to generate and utilize intermediates in one pass is of great desire. Biology manages its complex reaction network of multi-step, multi-enzyme processes by numerous means, namely spatial control via compartmentalization. By controlling where certain processes occur and the diffusion of key intermediates between reaction sites, biology efficiently carries out multiple concurrent reaction sequences efficiently with minimal competing pathways. For example, carboxysomes enhance the rate of CO2 fixation by co-encapsulating carbonic anhydrase and ribose 1,5-bisphosphate carboxylase-oxygenase while excluding deactivating oxygen (O2). Inspired by spatial control in biology, my research seeks to adapt such methods of spatial control to construct efficient multi-step, multi-catalyst organometallic and electrochemical processes. In this manner, commodity chemicals can be produced from abundant feedstocks while obviating intermediate isolation and work up. Electrochemistry has emerged within the last few decades at the forefront of small molecule activation, particularly of environmental pollutants such as CO2, and organometallic chemistry is apt to further utilize products of electrochemical small molecule activation owing to decades of rich literature in homogeneous catalyst development. However, it is highly likely that catalyst - catalyst, catalyst - substrate, or substrate - substrate interference may impede the integration of multiple processes. Potential undesired interference may be circumvented by spatially separating while co-localizing the electro- and organometallic (or any type) catalysts in one reactor system allowing the transport of intermediates between them. The projects outlined below demonstrate the critical role spatial control and mass transport have in constructing efficient multi-step, multi-catalyst electro- and/or organometallic processes.In the first research project (Chapter 2), we developed and applied a microkinetic model to extract design principles in compartmentalization of organometallic catalysis by a variety of micro- and nanostructures. Owing to fundamental understandings of compartmentalization in biology, the biocatalytic community has experimentally and theoretically studied in vitro confined enzyme cascades to develop efficient multi-enzyme pathways. However, the organometallic community has just recently begun to explore the positive impact spatial control via compartmentalization can have on transition metal catalysts. Additionally, no theoretical investigations that mathematically model confined organometallics have been reported, impeding future development and optimization. Thus, we developed a mathematical model to study and predict under what set of kinetic and diffusive parameters would a particular compartment impart catalytic benefits to a multi-step organometallic process. An integral term in this work is called volumetric diffusive conductance (FV), which describes a species' propensity for entry into and exit out of a particular compartment. From this work we derived that FV should be tailored by tuning the confinement's surface area and volume to be equal to or less than the kinetics of the multi-step process. In this way, a compartment can competently retain intermediates along a reaction pathway to avoid counterproductive side reactions. This finding was verified by adapting our kinetic model to several experimentally confined organometallic systems. Inspired by the work from Chapter 2 in spatial control for multi-step processes, the research project outlined in Chapter 3 seeks to spatially separate electrochemical CO2 reduction (CO2RR) to carbon monoxide (CO) and palladium (Pd) catalyzed CO and ethylene (C2H4) copolymerization to polyketone (PK) in collaboration with the Alex Miller lab from UNC Chapel Hill, and the Dunwei Wang lab at Boston College.
- 초록/해제
- 요약Such process integration has been demonstrated to lead to enhanced catalytic performance, as well as to develop new multi-step processes unattainable without spatial control.
- 일반주제명
- Inorganic chemistry
- 일반주제명
- Materials science
- 일반주제명
- Physical chemistry
- 일반주제명
- Biochemistry
- 키워드
- Continuous flow
- 키워드
- Electrochemistry
- 키워드
- Organometallics
- 키워드
- Spatial control
- 기타저자
- University of California, Los Angeles Chemistry 0153
- 기본자료저록
- Dissertations Abstracts International. 85-12B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
008250123s2024 us c eng d■001000017163154
■00520250211152210
■006m o d
■007cr#unu||||||||
■020 ▼a9798382837284
■035 ▼a(MiAaPQ)AAI31328309
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a546
■1001 ▼aJolly, Brandon Joseph.
■24510▼aSpatial Control in Multi-step, Multi-catalyst Organometallic and Electrochemical Processes
■260 ▼a[Sl]▼bUniversity of California, Los Angeles▼c2024
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2024
■300 ▼a233 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 85-12, Section: B.
■500 ▼aAdvisor: Liu, Chong.
■5021 ▼aThesis (Ph.D.)--University of California, Los Angeles, 2024.
■520 ▼aMulti-step processes, such as catalytic cycles, proceed through one or more intermediates that may participate in unwanted side reactions, leading to inefficiency and waste. Further, these intermediates may have a short shelf life and/or pose a safety concern. Thus, the development of methods to carry out multi-step processes to generate and utilize intermediates in one pass is of great desire. Biology manages its complex reaction network of multi-step, multi-enzyme processes by numerous means, namely spatial control via compartmentalization. By controlling where certain processes occur and the diffusion of key intermediates between reaction sites, biology efficiently carries out multiple concurrent reaction sequences efficiently with minimal competing pathways. For example, carboxysomes enhance the rate of CO2 fixation by co-encapsulating carbonic anhydrase and ribose 1,5-bisphosphate carboxylase-oxygenase while excluding deactivating oxygen (O2). Inspired by spatial control in biology, my research seeks to adapt such methods of spatial control to construct efficient multi-step, multi-catalyst organometallic and electrochemical processes. In this manner, commodity chemicals can be produced from abundant feedstocks while obviating intermediate isolation and work up. Electrochemistry has emerged within the last few decades at the forefront of small molecule activation, particularly of environmental pollutants such as CO2, and organometallic chemistry is apt to further utilize products of electrochemical small molecule activation owing to decades of rich literature in homogeneous catalyst development. However, it is highly likely that catalyst - catalyst, catalyst - substrate, or substrate - substrate interference may impede the integration of multiple processes. Potential undesired interference may be circumvented by spatially separating while co-localizing the electro- and organometallic (or any type) catalysts in one reactor system allowing the transport of intermediates between them. The projects outlined below demonstrate the critical role spatial control and mass transport have in constructing efficient multi-step, multi-catalyst electro- and/or organometallic processes.In the first research project (Chapter 2), we developed and applied a microkinetic model to extract design principles in compartmentalization of organometallic catalysis by a variety of micro- and nanostructures. Owing to fundamental understandings of compartmentalization in biology, the biocatalytic community has experimentally and theoretically studied in vitro confined enzyme cascades to develop efficient multi-enzyme pathways. However, the organometallic community has just recently begun to explore the positive impact spatial control via compartmentalization can have on transition metal catalysts. Additionally, no theoretical investigations that mathematically model confined organometallics have been reported, impeding future development and optimization. Thus, we developed a mathematical model to study and predict under what set of kinetic and diffusive parameters would a particular compartment impart catalytic benefits to a multi-step organometallic process. An integral term in this work is called volumetric diffusive conductance (FV), which describes a species' propensity for entry into and exit out of a particular compartment. From this work we derived that FV should be tailored by tuning the confinement's surface area and volume to be equal to or less than the kinetics of the multi-step process. In this way, a compartment can competently retain intermediates along a reaction pathway to avoid counterproductive side reactions. This finding was verified by adapting our kinetic model to several experimentally confined organometallic systems. Inspired by the work from Chapter 2 in spatial control for multi-step processes, the research project outlined in Chapter 3 seeks to spatially separate electrochemical CO2 reduction (CO2RR) to carbon monoxide (CO) and palladium (Pd) catalyzed CO and ethylene (C2H4) copolymerization to polyketone (PK) in collaboration with the Alex Miller lab from UNC Chapel Hill, and the Dunwei Wang lab at Boston College.
■520 ▼aSuch process integration has been demonstrated to lead to enhanced catalytic performance, as well as to develop new multi-step processes unattainable without spatial control.
■590 ▼aSchool code: 0031.
■650 4▼aInorganic chemistry
■650 4▼aMaterials science
■650 4▼aPhysical chemistry
■650 4▼aBiochemistry
■653 ▼aCompartmentalization
■653 ▼aContinuous flow
■653 ▼aElectrochemistry
■653 ▼aMaterials chemistry
■653 ▼aOrganometallics
■653 ▼aSpatial control
■690 ▼a0488
■690 ▼a0794
■690 ▼a0487
■690 ▼a0494
■71020▼aUniversity of California, Los Angeles▼bChemistry 0153.
■7730 ▼tDissertations Abstracts International▼g85-12B.
■790 ▼a0031
■791 ▼aPh.D.
■792 ▼a2024
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17163154▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.


