Ultrastable halide perovskite CsPbBr3 photoanodes achieved with electrocatalytic glassy-carbon and boron-doped diamond sheets

Zhonghui Zhu, Matyas Daboczi, Minzhi Chen, Yimin Xuan (), Xianglei Liu and Salvador Eslava ()
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Zhonghui Zhu: Imperial College London
Matyas Daboczi: Imperial College London
Minzhi Chen: Imperial College London
Yimin Xuan: Nanjing University of Aeronautics and Astronautics
Xianglei Liu: Nanjing University of Aeronautics and Astronautics
Salvador Eslava: Imperial College London

Nature Communications, 2024, vol. 15, issue 1, 1-10

Abstract: Abstract Halide perovskites exhibit exceptional optoelectronic properties for photoelectrochemical production of solar fuels and chemicals but their instability in aqueous electrolytes hampers their application. Here we present ultrastable perovskite CsPbBr3-based photoanodes achieved with both multifunctional glassy carbon and boron-doped diamond sheets coated with Ni nanopyramids and NiFeOOH. These perovskite photoanodes achieve record operational stability in aqueous electrolytes, preserving 95% of their initial photocurrent density for 168 h of continuous operation with the glassy carbon sheets and 97% for 210 h with the boron-doped diamond sheets, due to the excellent mechanical and chemical stability of glassy carbon, boron-doped diamond, and nickel metal. Moreover, these photoanodes reach a low water-oxidation onset potential close to +0.4 VRHE and photocurrent densities close to 8 mA cm−2 at 1.23 VRHE, owing to the high conductivity of glassy carbon and boron-doped diamond and the catalytic activity of NiFeOOH. The applied catalytic, protective sheets employ only earth-abundant elements and straightforward fabrication methods, engineering a solution for the success of halide perovskites in stable photoelectrochemical cells.

Date: 2024
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DOI: 10.1038/s41467-024-47100-2

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