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Grand Canonical Approach to Modeling Dynamic Catalysts: From Thermal to Electro-Catalysis, From Clusters to Surfaces
Grand Canonical Approach to Modeling Dynamic Catalysts: From Thermal to Electro-Catalysis, From Clusters to Surfaces
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20250211151451
- ISBN
- 9798382769103
- DDC
- 542
- 저자명
- Zhang, Zisheng.
- 서명/저자
- Grand Canonical Approach to Modeling Dynamic Catalysts: From Thermal to Electro-Catalysis, From Clusters to Surfaces
- 발행사항
- [Sl] : University of California, Los Angeles, 2024
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2024
- 형태사항
- 284 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 85-11, Section: B.
- 주기사항
- Advisor: Alexandrova, Anastassia N.
- 학위논문주기
- Thesis (Ph.D.)--University of California, Los Angeles, 2024.
- 초록/해제
- 요약Dynamic structural rearrangement has been observed in a wide range of heterogeneous catalysts and functional materials when they are in operation. Such fluxional behaviors underlie the reactivity, activation, or deactivation in various catalytic systems. However, experimentally resolving their atomic structures has been challenging due to the transient and minority nature of the metastable motifs and surface phases. The role of theory in investigating those dynamic systems hence remains singular.This dissertation will focus on the development and application of a grand canonical (GC) approach to model catalysts that undergo significant off-stoichiometric restructurings in reaction conditions. Grand canonical genetic algorithm (GCGA), an efficient global optimization algorithm, is implemented and used to explore the vast chemical space of cluster isomerization, surface atoms rearrangement, mixed coverage and configuration of adsorbates, and to locate the global and relevant local minima. The found minima constitute a GC ensemble of catalyst states that are diverse in structure, stoichiometry, and reactivity. By ab initio thermodynamics and grand canonical density functional theory (GC-DFT) calculations, the dependence on reaction conditions (temperature, partial pressures, pH, electrode potential, solute concentrations, etc.) can be included into the free energetics of the states, to probe how the distribution of states responds to varying conditions.This approach has been applied to investigate multiple systems ranging from thermal to electro-catalysis, and from supported clusters to extended surfaces. This talk will cover a few representative systems, including boron nitride in thermal oxidative dehydrogenation conditions, supported sub-nanometer metal clusters in electrocatalysis, and copper electrodes in electroreduction conditions. The dissertation works will illustrate how the GC approach not only helps interpret complex experimental observations, but also provides rich atomic insights into the structure and reactivity of catalytic species, and lays the foundation to build a new paradigm for reaction kinetics, catalyst optimization, non-equilibrium behaviors, and more.
- 일반주제명
- Computational chemistry
- 일반주제명
- Condensed matter physics
- 일반주제명
- Materials science
- 일반주제명
- Physical chemistry
- 키워드
- Catalysis
- 키워드
- Electrochemistry
- 기타저자
- University of California, Los Angeles Chemistry 0153
- 기본자료저록
- Dissertations Abstracts International. 85-11B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■00520250211151451
■006m o d
■007cr#unu||||||||
■020 ▼a9798382769103
■035 ▼a(MiAaPQ)AAI31296762
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a542
■1001 ▼aZhang, Zisheng.
■24510▼aGrand Canonical Approach to Modeling Dynamic Catalysts: From Thermal to Electro-Catalysis, From Clusters to Surfaces
■260 ▼a[Sl]▼bUniversity of California, Los Angeles▼c2024
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2024
■300 ▼a284 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 85-11, Section: B.
■500 ▼aAdvisor: Alexandrova, Anastassia N.
■5021 ▼aThesis (Ph.D.)--University of California, Los Angeles, 2024.
■520 ▼aDynamic structural rearrangement has been observed in a wide range of heterogeneous catalysts and functional materials when they are in operation. Such fluxional behaviors underlie the reactivity, activation, or deactivation in various catalytic systems. However, experimentally resolving their atomic structures has been challenging due to the transient and minority nature of the metastable motifs and surface phases. The role of theory in investigating those dynamic systems hence remains singular.This dissertation will focus on the development and application of a grand canonical (GC) approach to model catalysts that undergo significant off-stoichiometric restructurings in reaction conditions. Grand canonical genetic algorithm (GCGA), an efficient global optimization algorithm, is implemented and used to explore the vast chemical space of cluster isomerization, surface atoms rearrangement, mixed coverage and configuration of adsorbates, and to locate the global and relevant local minima. The found minima constitute a GC ensemble of catalyst states that are diverse in structure, stoichiometry, and reactivity. By ab initio thermodynamics and grand canonical density functional theory (GC-DFT) calculations, the dependence on reaction conditions (temperature, partial pressures, pH, electrode potential, solute concentrations, etc.) can be included into the free energetics of the states, to probe how the distribution of states responds to varying conditions.This approach has been applied to investigate multiple systems ranging from thermal to electro-catalysis, and from supported clusters to extended surfaces. This talk will cover a few representative systems, including boron nitride in thermal oxidative dehydrogenation conditions, supported sub-nanometer metal clusters in electrocatalysis, and copper electrodes in electroreduction conditions. The dissertation works will illustrate how the GC approach not only helps interpret complex experimental observations, but also provides rich atomic insights into the structure and reactivity of catalytic species, and lays the foundation to build a new paradigm for reaction kinetics, catalyst optimization, non-equilibrium behaviors, and more.
■590 ▼aSchool code: 0031.
■650 4▼aComputational chemistry
■650 4▼aCondensed matter physics
■650 4▼aMaterials science
■650 4▼aPhysical chemistry
■653 ▼aCatalysis
■653 ▼aDensity functional theory
■653 ▼aElectrochemistry
■653 ▼aGlobal optimization
■653 ▼aStatistical mechanics
■690 ▼a0219
■690 ▼a0794
■690 ▼a0611
■690 ▼a0494
■71020▼aUniversity of California, Los Angeles▼bChemistry 0153.
■7730 ▼tDissertations Abstracts International▼g85-11B.
■790 ▼a0031
■791 ▼aPh.D.
■792 ▼a2024
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17161834▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.


