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Exploring Atmospheric and Catalytic Reactions at the Interfaces
Exploring Atmospheric and Catalytic Reactions at the Interfaces
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20250211152211
- ISBN
- 9798384023159
- DDC
- 540
- 저자명
- Liu, Ziao.
- 서명/저자
- Exploring Atmospheric and Catalytic Reactions at the Interfaces
- 발행사항
- [Sl] : University of Pennsylvania, 2024
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2024
- 형태사항
- 136 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 86-02, Section: B.
- 주기사항
- Advisor: Francisco, Joseph S.
- 학위논문주기
- Thesis (Ph.D.)--University of Pennsylvania, 2024.
- 초록/해제
- 요약Reducing atmospheric pollutants and greenhouse gas is one of the pressing needs for environmental sustainability. Interfacial chemistry plays a crucial role in addressing this challenge. The first part of this thesis focuses on the uptake and chemistry of nitrogen dioxide (NO2), a significant atmospheric pollutant, on two major dust components - 慣-quartz and calcite. Through first principle dynamic simulations under water constrained conditions, (1) on the surface of hydroxylated 慣-quartz, NO2 is initially absorbed as HONO, then barrierlessly converts to nitric acid, and can possibly further dissociate into NO and OH radicals. (2) on the surface of calcite, NO2 directly converts into HONO without being further photoactivated. Notably, in both cases, the formation of HONO does not call for the dimerization of NO2, the traditional and most accepted mechanism, yet questionable even in highly polluted areas. These findings have provided robust theoretical support for understanding the atmospheric fate of NO2 and offer valuable insights for developing novel technology to remove NO2.Parallel studies highlight the design of a novel MOF catalyst, featuring asymmetric Ni/Cu sites stabilized by a pyrazolate linker (noted as Cu1Ni-BDP) with exceptional selectivity and stability for the electrochemical reduction of CO2 to ethylene. Through density functional theory, a mapping of the energy profile along the key reaction pathway from *CO to *C2H4 is presented. Among three candidates with distinct catalytic sites, Cu1Ni-BDP exhibited the moderate binding energy of *CO at -2.94 eV. In the critical rate-limiting steps of *COH-*COH and *CH2-CH towards C2+ products, Cu1Ni-BDP demonstrated the lowest Gibbs free energy of -0.08 eV and 0.01 eV, respectively, suggesting the asymmetric Ni/Cu sites can effectively enhance the formation and absorption of symmetric intermediates, thereby promoting CO2 to C2+ product with higher selectivity, in line with experimental results.Herein, a deep understanding and exploitation of the interfacial chemistry is pivotal in elucidating the conversion mechanism of NO2 to provide solid theoretical support in pollutant control and guiding an important strategy for designing more efficient and selective catalysts to utilize greenhouse gas effectively.
- 일반주제명
- Chemistry
- 일반주제명
- Atmospheric chemistry
- 일반주제명
- Analytical chemistry
- 키워드
- Nitrogen dioxide
- 기타저자
- University of Pennsylvania Chemistry
- 기본자료저록
- Dissertations Abstracts International. 86-02B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■00520250211152211
■006m o d
■007cr#unu||||||||
■020 ▼a9798384023159
■035 ▼a(MiAaPQ)AAI31333381
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a540
■1001 ▼aLiu, Ziao.
■24510▼aExploring Atmospheric and Catalytic Reactions at the Interfaces
■260 ▼a[Sl]▼bUniversity of Pennsylvania▼c2024
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2024
■300 ▼a136 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 86-02, Section: B.
■500 ▼aAdvisor: Francisco, Joseph S.
■5021 ▼aThesis (Ph.D.)--University of Pennsylvania, 2024.
■520 ▼aReducing atmospheric pollutants and greenhouse gas is one of the pressing needs for environmental sustainability. Interfacial chemistry plays a crucial role in addressing this challenge. The first part of this thesis focuses on the uptake and chemistry of nitrogen dioxide (NO2), a significant atmospheric pollutant, on two major dust components - 慣-quartz and calcite. Through first principle dynamic simulations under water constrained conditions, (1) on the surface of hydroxylated 慣-quartz, NO2 is initially absorbed as HONO, then barrierlessly converts to nitric acid, and can possibly further dissociate into NO and OH radicals. (2) on the surface of calcite, NO2 directly converts into HONO without being further photoactivated. Notably, in both cases, the formation of HONO does not call for the dimerization of NO2, the traditional and most accepted mechanism, yet questionable even in highly polluted areas. These findings have provided robust theoretical support for understanding the atmospheric fate of NO2 and offer valuable insights for developing novel technology to remove NO2.Parallel studies highlight the design of a novel MOF catalyst, featuring asymmetric Ni/Cu sites stabilized by a pyrazolate linker (noted as Cu1Ni-BDP) with exceptional selectivity and stability for the electrochemical reduction of CO2 to ethylene. Through density functional theory, a mapping of the energy profile along the key reaction pathway from *CO to *C2H4 is presented. Among three candidates with distinct catalytic sites, Cu1Ni-BDP exhibited the moderate binding energy of *CO at -2.94 eV. In the critical rate-limiting steps of *COH-*COH and *CH2-CH towards C2+ products, Cu1Ni-BDP demonstrated the lowest Gibbs free energy of -0.08 eV and 0.01 eV, respectively, suggesting the asymmetric Ni/Cu sites can effectively enhance the formation and absorption of symmetric intermediates, thereby promoting CO2 to C2+ product with higher selectivity, in line with experimental results.Herein, a deep understanding and exploitation of the interfacial chemistry is pivotal in elucidating the conversion mechanism of NO2 to provide solid theoretical support in pollutant control and guiding an important strategy for designing more efficient and selective catalysts to utilize greenhouse gas effectively.
■590 ▼aSchool code: 0175.
■650 4▼aChemistry
■650 4▼aAtmospheric chemistry
■650 4▼aAnalytical chemistry
■653 ▼aNitrogen dioxide
■653 ▼aEnvironmental sustainability
■653 ▼aGibbs free energy
■653 ▼aInterfacial chemistry
■690 ▼a0485
■690 ▼a0486
■690 ▼a0371
■71020▼aUniversity of Pennsylvania▼bChemistry.
■7730 ▼tDissertations Abstracts International▼g86-02B.
■790 ▼a0175
■791 ▼aPh.D.
■792 ▼a2024
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17163162▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.


