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Ultrafast Deposition of NiFe Metal‐organic Framework Catalysts Boosts BiVO4 Photoanode for Efficient Solar Water Splitting

Von Wiley-VCH zur Verfügung gestellt

A simple ultrasonic approach and ultrafast deposition were employed for the synthesis of Fe@Ni-MOFs/BiVO4. The Fe@Ni-MOFs/BiVO4 shows a photocurrent density of 4.89 mA cm−2 at 1.23 VRHE under one sun illumination with a stability of 30 h.


The severe photocorrosion of BiVO4 limits its application in solar energy conversion in the long-term photoelectrochemical stability test. Herein, we synthesized a Fe@Ni-MOFs/BiVO4 photoanode by a simple ultrasonic method and ultrafast deposition, which avoids the problems of damaging the surface structure of photoelectrode. The Fe@Ni-MOFs/BiVO4 shows a photocurrent density of 4.89 mA cm−2 at 1.23 VRHE with an onset potential of 0.25 VRHE under one sun illumination. Importantly, a stability over 30 h at 0.7 VRHE can be obtained, which is so far the best stability character for MOFs-based cocatalysts decorated on BiVO4. During operation, Fe@Ni-MOFs transforms into a homogeneous and active hydroxide layer covering the surface, which exposes more active sites for OER reactions. This work demonstrates a simple strategy for MOFs co-catalysts to obtain fast hole transfer capability and reduce carrier recombination, thereby improving PEC performance.

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