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Black phosphorene as a hole extraction layer boosting solar water splitting of oxygen evolution catalysts

Author

Listed:
  • Kan Zhang

    (Nanjing University of Science and Technology
    Yonsei University)

  • Bingjun Jin

    (Yonsei University)

  • Cheolwoo Park

    (Sookmyung Women’s University)

  • Yoonjun Cho

    (Yonsei University)

  • Xiufeng Song

    (Nanjing University of Science and Technology)

  • Xinjian Shi

    (Stanford University)

  • Shengli Zhang

    (Nanjing University of Science and Technology)

  • Wooyul Kim

    (Sookmyung Women’s University)

  • Haibo Zeng

    (Nanjing University of Science and Technology)

  • Jong Hyeok Park

    (Yonsei University)

Abstract

As the development of oxygen evolution co-catalysts (OECs) is being actively undertaken, the tailored integration of those OECs with photoanodes is expected to be a plausible avenue for achieving highly efficient solar-assisted water splitting. Here, we demonstrate that a black phosphorene (BP) layer, inserted between the OEC and BiVO4 can improve the photoelectrochemical performance of pre-optimized OEC/BiVO4 (OEC: NiOOH, MnOx, and CoOOH) systems by 1.2∼1.6-fold, while the OEC overlayer, in turn, can suppress BP self-oxidation to achieve a high durability. A photocurrent density of 4.48 mA·cm−2 at 1.23 V vs reversible hydrogen electrode (RHE) is achieved by the NiOOH/BP/BiVO4 photoanode. It is found that the intrinsic p-type BP can boost hole extraction from BiVO4 and prolong holes trapping lifetime on BiVO4 surface. This work sheds light on the design of BP-based devices for application in solar to fuel conversion, and also suggests a promising nexus between semiconductor and electrocatalyst.

Suggested Citation

  • Kan Zhang & Bingjun Jin & Cheolwoo Park & Yoonjun Cho & Xiufeng Song & Xinjian Shi & Shengli Zhang & Wooyul Kim & Haibo Zeng & Jong Hyeok Park, 2019. "Black phosphorene as a hole extraction layer boosting solar water splitting of oxygen evolution catalysts," Nature Communications, Nature, vol. 10(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-10034-1
    DOI: 10.1038/s41467-019-10034-1
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