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초록
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 1.21.6-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.
키워드
- 제목
- Black phosphorene as a hole extraction layer boosting solar water splitting of oxygen evolution catalysts
- 저자
- Zhang, Kan; Jin, Bingjun; Park, Cheolwoo; Cho, Yoonjun; Song, Xiufeng; Shi, Xinjian; Zhang, Shengli; Kim, Wooyul; Zeng, Haibo; Park, Jong Hyeok
- 발행일
- 2019-05
- 유형
- Article
- 권
- 10