본문 바로가기
HOME> 논문 > 논문 검색상세

논문 상세정보

ChemSusChem v.9 no.20, 2016년, pp.3005 - 3011   SCI SCIE
본 등재정보는 저널의 등재정보를 참고하여 보여주는 베타서비스로 정확한 논문의 등재여부는 등재기관에 확인하시기 바랍니다.

Water Oxidation by Size‐Selected Co27 Clusters Supported on Fe2O3

Pellin, Michael J. (Materials Science Division, Argonne National Laboratory, Argonne, Illinois, 60439, USA ) ; Riha, Shannon C. (Materials Science Division, Argonne National Laboratory, Argonne, Illinois, 60439, USA ) ; Tyo, Eric C. (Materials Science Division, Argonne National Laboratory, Argonne, Illinois, 60439, USA ) ; Kwon, Gihan (Materials Science Division, Argonne National Laboratory, Argonne, Illinois, 60439, USA ) ; Libera, Joseph A. (Energy Systems Division, Argonne National Laboratory, Argonne, Illinois, 60439, USA ) ; Elam, Jeffrey W. (Energy Systems Division, Argonne National Laboratory, Argonne, Illinois, 60439, USA ) ; Seifert, Soenke. (X-Ray Sciences Division, Argonne National Laboratory, Argonne, Illinois, 60439, USA ) ; Lee, Sungsik (X-Ray Sciences Division, Argonne National Laboratory, Argonne, Illinois, 60439, USA ) ; Vajda, Stefan ;
  • 초록  

    Abstract The complexity of the water oxidation reaction makes understanding the role of individual catalytic sites critical to improving the process. Here, size‐selected 27‐atom cobalt clusters (Co 27 ) deposited on hematite (Fe 2 O 3 ) anodes were tested for water oxidation activity. The uniformity of these anodes allows measurement of the activity of catalytic sites of well‐defined nuclearity and known density. Grazing incidence X‐ray absorption near‐edge spectroscopy (GIXANES) characterization of the anodes before and after electrochemical cycling demonstrates that these Co 27 clusters are stable to dissolution even in the harsh water oxidation electrochemical environment. They are also stable under illumination at the equivalent of 0.4 suns irradiation. The clusters show turnover rates for water oxidation that are comparable or higher than those reported for Pd‐ and Co‐based materials or for hematite. The support for the Co 27 clusters is Fe 2 O 3 grown by atomic layer deposition on a Si chip. We have chosen to deposit a Fe 2 O 3 layer that is only a few unit cells thick (2 nm), to remove complications related to exciton diffusion. We find that the electrocatalytic and the photoelectrocatalytic activity of the Co 27 /Fe 2 O 3 material is significantly improved when the samples are annealed (with the clusters already deposited). Given that the support is thin and that the cluster deposition density is equivalent to approximately 5 % of an atomic monolayer, we suggest that annealing may significantly improve the exciton diffusion from the support to the catalytic moiety.


  • 주제어

    cobalt cluster .   electrocatalysis .   hematite .   photoelectrocatalysis .   water oxidation.  

 활용도 분석

  • 상세보기

    amChart 영역
  • 원문보기

    amChart 영역

원문보기

무료다운로드
  • 원문이 없습니다.
유료다운로드

유료 다운로드의 경우 해당 사이트의 정책에 따라 신규 회원가입, 로그인, 유료 구매 등이 필요할 수 있습니다. 해당 사이트에서 발생하는 귀하의 모든 정보활동은 NDSL의 서비스 정책과 무관합니다.

원문복사신청을 하시면, 일부 해외 인쇄학술지의 경우 외국학술지지원센터(FRIC)에서
무료 원문복사 서비스를 제공합니다.

NDSL에서는 해당 원문을 복사서비스하고 있습니다. 위의 원문복사신청 또는 장바구니 담기를 통하여 원문복사서비스 이용이 가능합니다.

이 논문과 함께 출판된 논문 + 더보기