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 BiVO 4 can improve the photoelectrochemical performance of pre-optimized OEC/BiVO 4 (OEC: NiOOH, MnO x, 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/BiVO 4 photoanode. It is found that the intrinsic p-type BP can boost hole extraction from BiVO 4 and prolong holes trapping lifetime on BiVO 4 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.
Bibliographical noteFunding Information:
This work was supported by NSFC (51802157, 5151101197, 61725402), the Natural Science Foundation of Jiangsu Province of China (BK20180493), NRF Korea (NRF-2019R1A2C3010479, 2015M1A2A2074663, 2016M3D3A1A01913254 (C1 Gas Refinery Program)), the Fundamental Research Funds for the Central Universities (Nos. 30917011202, 30915012205, 30916015106), and PAPD of Jiangsu Higher Education Institutions. K.Z. acknowledges the support by “the Fundamental Research Funds for the Central Universities”, No.30918011106. K.Z. and B.J.J. contributed equally to this work.
All Science Journal Classification (ASJC) codes
- Biochemistry, Genetics and Molecular Biology(all)
- Physics and Astronomy(all)