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Exploring Atmospheric and Catalytic Reactions at the Interfaces
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
키워드  
Environmental sustainability
키워드  
Gibbs free energy
키워드  
Interfacial chemistry
기타저자  
University of Pennsylvania Chemistry
기본자료저록  
Dissertations Abstracts International. 86-02B.
전자적 위치 및 접속  
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MARC

 008250123s2024        us                              c    eng  d
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■006m          o    d                
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■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.

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