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Engineering Metal Oxide-Based Anode Catalysts For Water Electrolysis
Engineering Metal Oxide-Based Anode Catalysts For Water Electrolysis
Engineering Metal Oxide-Based Anode Catalysts For Water Electrolysis

Detailed Information

자료유형  
 학위논문 서양
최종처리일시  
20260202104740
ISBN  
9798290651699
DDC  
540
저자명  
Baek, Jihyun.
서명/저자  
Engineering Metal Oxide-Based Anode Catalysts For Water Electrolysis
발행사항  
[Sl] : Stanford University, 2024
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2024
형태사항  
188 p
주기사항  
Source: Dissertations Abstracts International, Volume: 87-01, Section: B.
주기사항  
Advisor: Zheng, Xiaolin.
학위논문주기  
Thesis (Ph.D.)--Stanford University, 2024.
초록/해제  
요약Water electrolysis stands as a cornerstone technology for the sustainable production of green hydrogen, a pivotal energy carrier in the global shift towards a low-carbon economy. The efficiency and economic viability of water electrolysis are heavily influenced by the oxygen evolution reaction (OER), a process marked by slow kinetics and substantial overpotential, which impedes overall system efficiency. To address these challenges, this thesis adopts a multidirectional approach to engineer innovative metal oxide-based anode catalysts that can effectively catalyze OER with reduced energy demands and improved durability. The research begins by addressing the limitations of traditional noble metal anodes, such as iridium and ruthenium, which, despite their high catalytic activities, are hindered by issues of cost, scarcity, and durability under operational conditions. This thesis explores the synthesis and application of high-entropy oxides (HEOs) as alternative anode materials. These oxides benefit from a diverse and tunable composition that can be precisely engineered to optimize interaction with OER intermediates, thereby enhancing catalytic activity and stability. The unique properties of HEOs, particularly their configurational entropy, are studied, both theoretically and experimentally, to understand their influence on catalytic performance, potentially leading to significant advancements in electrolysis efficiency. Furthermore, the research extends to exploring alternative anodic reactions that yield valuable chemical products such as hydrogen peroxide (H2O2) instead of oxygen, offering a greener and more manageable approach with reduced operational risks. The production of H2O2involves a two-electron transfer process, which, although requiring higher potentials than the OER, opens avenues for the selective catalysis using perovskite oxides. These materials are screened theoretically by introducing three different stability criteria and, particularly, LaAlO3is investigated for its activity, selectivity, and stability among the library of 2000 perovskite oxides. Lastly, the integration of solar energy into the electrolysis process through photoelectrochemical water splitting is examined. This part of the study focuses on the development of a BiVO4photoanode, where doping and junction engineering strategies are employed to improve its light absorption efficiency and charge separation efficiency in the bulk and at the surface of the catalyst, further enhancing the overall water splitting performance. This comprehensive research provides a detailed examination of the challenges associated with OER at the anode in water electrolysis. It features significant advancements in anode material research, focusing on the synthesis, characterization, and performance evaluation of novel catalytic materials. By addressing critical technological challenges and leveraging advanced material engineering strategies, this work aims to pave the way for next-generation anode materials that could substantially enhance the efficiency and scalability of water electrolysis systems.
일반주제명  
Crystal structure
일반주제명  
Electrolytes
일반주제명  
Electrons
일반주제명  
Oxidation
일반주제명  
Glass substrates
일반주제명  
Nanoparticles
일반주제명  
Water
일반주제명  
Heat
일반주제명  
Metal oxides
일반주제명  
Energy
일반주제명  
Voltammetry
일반주제명  
Hydrogen peroxide
일반주제명  
Entropy
일반주제명  
Atoms & subatomic particles
기타저자  
Stanford University.
기본자료저록  
Dissertations Abstracts International. 87-01B.
전자적 위치 및 접속  
로그인 후 원문을 볼 수 있습니다.

MARC

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■1001  ▼aBaek,  Jihyun.
■24510▼aEngineering  Metal  Oxide-Based  Anode  Catalysts  For  Water  Electrolysis
■260    ▼a[Sl]▼bStanford  University▼c2024
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2024
■300    ▼a188  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  87-01,  Section:  B.
■500    ▼aAdvisor:  Zheng,  Xiaolin.
■5021  ▼aThesis  (Ph.D.)--Stanford  University,  2024.
■520    ▼aWater  electrolysis  stands  as  a  cornerstone  technology  for  the  sustainable  production  of  green  hydrogen,  a  pivotal  energy  carrier  in  the  global  shift  towards  a  low-carbon  economy.  The  efficiency  and  economic  viability  of  water  electrolysis  are  heavily  influenced  by  the  oxygen  evolution  reaction  (OER),  a  process  marked  by  slow  kinetics  and  substantial  overpotential,  which  impedes  overall  system  efficiency.  To  address  these  challenges,  this  thesis  adopts  a  multidirectional  approach  to  engineer  innovative  metal  oxide-based  anode  catalysts  that  can  effectively  catalyze  OER  with  reduced  energy  demands  and  improved  durability.  The  research  begins  by  addressing  the  limitations  of  traditional  noble  metal  anodes,  such  as  iridium  and  ruthenium,  which,  despite  their  high  catalytic  activities,  are  hindered  by  issues  of  cost,  scarcity,  and  durability  under  operational  conditions.  This  thesis  explores  the  synthesis  and  application  of  high-entropy  oxides  (HEOs)  as  alternative  anode  materials.  These  oxides  benefit  from  a  diverse  and  tunable  composition  that  can  be  precisely  engineered  to  optimize  interaction  with  OER  intermediates,  thereby  enhancing  catalytic  activity  and  stability.  The  unique  properties  of  HEOs,  particularly  their  configurational  entropy,  are  studied,  both  theoretically  and  experimentally,  to  understand  their  influence  on  catalytic  performance,  potentially  leading  to  significant  advancements  in  electrolysis  efficiency.  Furthermore,  the  research  extends  to  exploring  alternative  anodic  reactions  that  yield  valuable  chemical  products  such  as  hydrogen  peroxide  (H2O2)  instead  of  oxygen,  offering  a  greener  and  more  manageable  approach  with  reduced  operational  risks.  The  production  of  H2O2involves  a  two-electron  transfer  process,  which,  although  requiring  higher  potentials  than  the  OER,  opens  avenues  for  the  selective  catalysis  using  perovskite  oxides.  These  materials  are  screened  theoretically  by  introducing  three  different  stability  criteria  and,  particularly,  LaAlO3is  investigated  for  its  activity,  selectivity,  and  stability  among  the  library  of  2000  perovskite  oxides.  Lastly,  the  integration  of  solar  energy  into  the  electrolysis  process  through  photoelectrochemical  water  splitting  is  examined.  This  part  of  the  study  focuses  on  the  development  of  a  BiVO4photoanode,  where  doping  and  junction  engineering  strategies  are  employed  to  improve  its  light  absorption  efficiency  and  charge  separation  efficiency  in  the  bulk  and  at  the  surface  of  the  catalyst,  further  enhancing  the  overall  water  splitting  performance.  This  comprehensive  research  provides  a  detailed  examination  of  the  challenges  associated  with  OER  at  the  anode  in  water  electrolysis.  It  features  significant  advancements  in  anode  material  research,  focusing  on  the  synthesis,  characterization,  and  performance  evaluation  of  novel  catalytic  materials.  By  addressing  critical  technological  challenges  and  leveraging  advanced  material  engineering  strategies,  this  work  aims  to  pave  the  way  for  next-generation  anode  materials  that  could  substantially  enhance  the  efficiency  and  scalability  of  water  electrolysis  systems.
■590    ▼aSchool  code:  0212.
■650  4▼aCrystal  structure
■650  4▼aElectrolytes
■650  4▼aElectrons
■650  4▼aOxidation
■650  4▼aGlass  substrates
■650  4▼aNanoparticles
■650  4▼aWater
■650  4▼aHeat
■650  4▼aMetal  oxides
■650  4▼aEnergy
■650  4▼aVoltammetry
■650  4▼aHydrogen  peroxide
■650  4▼aEntropy
■650  4▼aAtoms  &  subatomic  particles
■690    ▼a0791
■71020▼aStanford  University.
■7730  ▼tDissertations  Abstracts  International▼g87-01B.
■790    ▼a0212
■791    ▼aPh.D.
■792    ▼a2024
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17358708▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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