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나노입자 연구단
나노입자 연구단
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Iron oxide photoelectrode with multidimensional architecture for highly efficient photoelectrochemical water splitting

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Title
Iron oxide photoelectrode with multidimensional architecture for highly efficient photoelectrochemical water splitting
Author(s)
Jin Soo Kang; Yoonsook Noh; Jin Kim; Hyelim Choi; Tae Hwa Jeon; Docheon Ahn; Jae-Yup Kim; Seung-Ho Yu; Hyeji Park; Jun-Ho Yum; Wonyong Choi; David C. Dunand; Heeman Choe; Yung-Eun Sung
Publication Date
2017-06
Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, v.56, no.23, pp.6583 - 6588
Publisher
WILEY-V C H VERLAG GMBH
Abstract
Nanostructured metal oxide semiconductors have shown outstanding performances in photoelectrochemical (PEC) water splitting, but limitations in light harvesting and charge collection have necessitated further advances in photoelectrode design. Herein, we propose anodized Fe foams (AFFs) with multidimensional nano/micro-architectures as a highly efficient photoelectrode for PEC water splitting. Fe foams fabricated by freeze-casting and sintering were electrochemically anodized and directly used as photoanodes. We verified the superiority of our design concept by achieving an unprecedented photocurrent density in PEC water splitting over5 mAcm@2 before the dark current onset, which originated from the large surface area and low electrical resistance of the AFFs. A photocurrent of over 6.8 mAcm@2 and an accordingly high incident photon-to-current efficiency of over 50% at 400 nm were achieved with incorporation of Co oxygen evolution catalysts. In addition, research opportunities for further advances by structual and compositional modifications are discussed, which can resolve the low fill factoring behavior and improve the overall performance. (c) 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
URI
https://pr.ibs.re.kr/handle/8788114/4355
ISSN
1433-7851
Appears in Collections:
Center for Nanoparticle Research(나노입자 연구단) > Journal Papers (저널논문)
Files in This Item:
9. Kang_et_al-2017-Angewandte_Chemie_International_Edition.pdfDownload

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