본문

서브메뉴

Studies of Colloidal Iron Carbide Nanoparticle Fischer-Tropsch Catalysts: Characterizing Adsorption Sites and Reactivity Towards Hydrogen Atom Transfers- [electronic resource]
Studies of Colloidal Iron Carbide Nanoparticle Fischer-Tropsch Catalysts: Characterizing Adsorption Sites and Reactivity Towards Hydrogen Atom Transfers- [electronic resource]

상세정보

자료유형  
 학위논문
Control Number  
0016931163
International Standard Book Number  
9798379780876
Dewey Decimal Classification Number  
546
Main Entry-Personal Name  
Dwarica, Nicolas S. .
Publication, Distribution, etc. (Imprint  
[S.l.] : Yale University., 2023
Publication, Distribution, etc. (Imprint  
Ann Arbor : ProQuest Dissertations & Theses, 2023
Physical Description  
1 online resource(139 p.)
General Note  
Source: Dissertations Abstracts International, Volume: 85-01, Section: B.
General Note  
Advisor: Mayer, James M. .
Dissertation Note  
Thesis (Ph.D.)--Yale University, 2023.
Restrictions on Access Note  
This item must not be sold to any third party vendors.
Summary, Etc.  
요약Iron carbide catalysts have been used for nearly 100 years in the Fischer-Tropsch process (FTP), yet the atomic nature of the active site(s) for H2 and CO have not been fully characterized. The FTP has recently gained interest as a method for the sustainable production of aviation fuels; however, this process suffers from limited product selectivity. A better understanding of the active site(s) could allow for more rational design of iron carbide catalysts, where changes in active site structure(s) could be correlated with catalyst activity. Here, we present the synthesis, characterization, and catalysis by a well-defined dodecylamine-capped colloidal iron carbide (DDA-FexC) nanoparticle (NP) system. This colloidal NP system is amenable to solution phase reactivity studies, spectroscopic measurements, and catalysis towards olefin hydrogenation and carbon monoxide hydrogenation at mild conditions. The tandem use of x-ray and FTIR spectroscopies along with density functional theory (DFT) calculations and molecular dynamic simulations enabled the identification of the structures of adsorbed hydrogen (Hads) and carbon monoxide (COads) over these DDA-FexC NPs. 57Fe Nuclear resonant vibrational spectroscopy revealed a Fe-C vibration for COads consistent with terminally bound CO, as supported by DFT calculations. FTIR revealed a distribution of *C-D vibrations for NPs treated with D2, consistent with adsorption over surface carbide sites supported by DFT calculations. Extended x-ray absorption fine structure (EXAFS) measurements of DDA-FexC NPs treated with H2 and CO showed measurable increases in Fe-Fe and Fe-C bond lengths that varied with coverage. The experimentally measured vibrational energies are used to validate the active site structures generated by DFT calculations and molecular dynamics. These results demonstrate the powerful combination of experiment and theory to better understand an elusive catalytic system and may aid in the rational development of future iron carbide catalysts.
Subject Added Entry-Topical Term  
Inorganic chemistry.
Subject Added Entry-Topical Term  
Nanoscience.
Index Term-Uncontrolled  
Colloidal
Index Term-Uncontrolled  
Heterogeneous catalysis
Index Term-Uncontrolled  
Iron carbide
Index Term-Uncontrolled  
Nanomaterials
Index Term-Uncontrolled  
Spectroscopic measurements
Added Entry-Corporate Name  
Yale University Chemistry
Host Item Entry  
Dissertations Abstracts International. 85-01B.
Host Item Entry  
Dissertation Abstract International
Electronic Location and Access  
로그인을 한후 보실 수 있는 자료입니다.
Control Number  
joongbu:640898

MARC

 008240220s2023        ulk                      00        kor
■001000016931163
■00520240214095928
■006m          o    d                
■007cr#unu||||||||
■020    ▼a9798379780876
■035    ▼a(MiAaPQ)AAI29397325
■040    ▼aMiAaPQ▼cMiAaPQ
■0820  ▼a546
■1001  ▼aDwarica,  Nicolas  S.  .
■24510▼aStudies  of  Colloidal  Iron  Carbide  Nanoparticle  Fischer-Tropsch  Catalysts:  Characterizing  Adsorption  Sites  and  Reactivity  Towards  Hydrogen  Atom  Transfers▼h[electronic  resource]
■260    ▼a[S.l.]▼bYale  University.  ▼c2023
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2023
■300    ▼a1  online  resource(139  p.)
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  85-01,  Section:  B.
■500    ▼aAdvisor:  Mayer,  James  M.  .
■5021  ▼aThesis  (Ph.D.)--Yale  University,  2023.
■506    ▼aThis  item  must  not  be  sold  to  any  third  party  vendors.
■520    ▼aIron  carbide  catalysts  have  been  used  for  nearly  100  years  in  the  Fischer-Tropsch  process  (FTP),  yet  the  atomic  nature  of  the  active  site(s)  for  H2  and  CO  have  not  been  fully  characterized.  The  FTP  has  recently  gained  interest  as  a  method  for  the  sustainable  production  of  aviation  fuels;  however,  this  process  suffers  from  limited  product  selectivity.  A  better  understanding  of  the  active  site(s)  could  allow  for  more  rational  design  of  iron  carbide  catalysts,  where  changes  in  active  site  structure(s)  could  be  correlated  with  catalyst  activity.  Here,  we  present  the  synthesis,  characterization,  and  catalysis  by  a  well-defined  dodecylamine-capped  colloidal  iron  carbide  (DDA-FexC)  nanoparticle  (NP)  system.  This  colloidal  NP  system  is  amenable  to  solution  phase  reactivity  studies,  spectroscopic  measurements,  and  catalysis  towards  olefin  hydrogenation  and  carbon  monoxide  hydrogenation  at  mild  conditions.  The  tandem  use  of  x-ray  and  FTIR  spectroscopies  along  with  density  functional  theory  (DFT)  calculations  and  molecular  dynamic  simulations  enabled  the  identification  of  the  structures  of  adsorbed  hydrogen  (Hads)  and  carbon  monoxide  (COads)  over  these  DDA-FexC  NPs.  57Fe  Nuclear  resonant  vibrational  spectroscopy  revealed  a  Fe-C  vibration  for  COads  consistent  with  terminally  bound  CO,  as  supported  by  DFT  calculations.  FTIR  revealed  a  distribution  of  *C-D  vibrations  for  NPs  treated  with  D2,  consistent  with  adsorption  over  surface  carbide  sites  supported  by  DFT  calculations.  Extended  x-ray  absorption  fine  structure  (EXAFS)  measurements  of  DDA-FexC  NPs  treated  with  H2  and  CO  showed  measurable  increases  in  Fe-Fe  and  Fe-C  bond  lengths  that  varied  with  coverage.  The  experimentally  measured  vibrational  energies  are  used  to  validate  the  active  site  structures  generated  by  DFT  calculations  and  molecular  dynamics.  These  results  demonstrate  the  powerful  combination  of  experiment  and  theory  to  better  understand  an  elusive  catalytic  system  and  may  aid  in  the  rational  development  of  future  iron  carbide  catalysts.
■590    ▼aSchool  code:  0265.
■650  4▼aInorganic  chemistry.
■650  4▼aNanoscience.
■653    ▼aColloidal
■653    ▼aHeterogeneous  catalysis
■653    ▼aIron  carbide
■653    ▼aNanomaterials
■653    ▼aSpectroscopic  measurements
■690    ▼a0488
■690    ▼a0565
■71020▼aYale  University▼bChemistry.
■7730  ▼tDissertations  Abstracts  International▼g85-01B.
■773    ▼tDissertation  Abstract  International
■790    ▼a0265
■791    ▼aPh.D.
■792    ▼a2023
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T16931163▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.
■980    ▼a202402▼f2024

미리보기

내보내기

chatGPT토론

Ai 추천 관련 도서


    New Books MORE
    Related books MORE
    최근 3년간 통계입니다.

    Info Détail de la recherche.

    • Réservation
    • 캠퍼스간 도서대출
    • 서가에 없는 책 신고
    • My Folder
    Matériel
    Reg No. Call No. emplacement Status Lend Info
    TQ0026818 T   원문자료 열람가능/출력가능 열람가능/출력가능
    마이폴더 부재도서신고

    * Les réservations sont disponibles dans le livre d'emprunt. Pour faire des réservations, S'il vous plaît cliquer sur le bouton de réservation

    해당 도서를 다른 이용자가 함께 대출한 도서

    Related books

    Related Popular Books

    도서위치