Surface-functionalized perovskite films for stable photoelectrochemical water splitting

Wang, Chongwu; Yang, Shuang; Chen, Xiao; Wen, Tianyu; Yang, Hua

doi:10.1039/c6ta08812k

Cited by 70 publications

(79 citation statements)

References 22 publications

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“…[121,122] Theo ther is through surface modification by organic dyes,plasmonic materials or quantum dots (QDs), etc., to enhance the visible light absorption. [123][124][125][126][127] The sluggish water splitting kinetics of the perovskite oxide-based photoelectrodes can be enhanced by surface decoration of cocatalysts or other functional materials with high electrocatalytic activity and charge transfer capability.…”

Section: Surface Engineeringmentioning

confidence: 99%

Perovskite Oxide Based Electrodes for High‐Performance Photoelectrochemical Water Splitting

et al. 2019

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Photoelectrochemical (PEC) water splitting is an attractive strategy for the large‐scale production of renewable hydrogen from water. Developing cost‐effective, active and stable semiconducting photoelectrodes is extremely important for achieving PEC water splitting with high solar‐to‐hydrogen efficiency. Perovskite oxides as a large family of semiconducting metal oxides are extensively investigated as electrodes in PEC water splitting owing to their abundance, high (photo)electrochemical stability, compositional and structural flexibility allowing the achievement of high electrocatalytic activity, superior sunlight absorption capability and precise control and tuning of band gaps and band edges. In this review, the research progress in the design, development, and application of perovskite oxides in PEC water splitting is summarized, with a special emphasis placed on understanding the relationship between the composition/structure and (photo)electrochemical activity.

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Section: Surface Engineeringmentioning

confidence: 99%

Perovskite Oxide Based Electrodes for High‐Performance Photoelectrochemical Water Splitting

et al. 2019

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“…While previous attempts to directly interface the regular structure perovskite surface to an electrolyte solution through a thin nickel layer have produced a moderate stability of 10-30 min with photocurrents varying between 2-17 mA cm −2 for the oxygen evolution reaction, [72][73][74] a significant improvement was recently demonstrated in our group by employing the low melting point Field's metal (FM) instead. [75] This InBiSn alloy could simultaneously provide encapsulation and electrical contact to a platinum nanoparticle (Pt-NP) catalyst, sustaining an encouraging hydrogen generation photocurrent of -6.9±1.8 mA cm −2 at 0 V against the reversible hydrogen electrode (RHE) beyond one hour.…”

Section: Introductionmentioning

confidence: 99%

Scalable Triple Cation Mixed Halide Perovskite–BiVO₄ Tandems for Bias‐Free Water Splitting

Andrei

Hoye

Crespo‐Quesada

et al. 2018

Advanced Energy Materials

150

210

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Strong interest exists in the development of organic-inorganic lead halide perovskite photovoltaics and of photoelectrochemical (PEC) tandem absorber systems for solar fuel production. However, their scalability and durability have long been limiting factors. In this work, we reveal how both fields can be seamlessly merged together, to obtain scalable, bias-free solar water splitting tandem devices. For this purpose, state-of-the-art cesium formamidinium methylammonium (CsFAMA) triple cation mixed halide perovskite photovoltaic cells with a nickel oxide (NiO x) hole transport layer are employed to produce Field's metal-epoxy encapsulated photocathodes. Their stability (up to 7 h), photocurrent density (-12.1±0.3 mA cm −2 at 0 V vs. RHE) and reproducibility enables a matching combination with robust BiVO 4 photoanodes, resulting in 0.25 cm 2 PEC tandems with an excellent stability of up to 20 h and a bias-free solar-to-hydrogen efficiency of 0.35±0.14%. The high reliability of the fabrication procedures allows scaling of the devices up to 10 cm 2 , with a slight decrease in bias-free photocurrent density from 0.39±0.15 mA cm −2 to 0.23±0.10 mA cm −2 due to an increasing series resistance. To characterise these devices, a versatile 3D-printed PEC cell was also developed. The modular PEC cell represents an affordable alternative to existing designs and can be easily adjusted for a broad range of samples. Overall, these findings shed further light on the factors required to bring both perovskite photovoltaics and photoelectrocatalysis into large-scale applications, revealing some key aspects for device fabrication, operation and implementation.

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“…Promising initial photocurrents of 12.5 mA cm −2 were achieved that gradually dropped to 2.5 mA cm −2 within 15 min using S 2− as a sacrificial reductant. The same Ni encapsulation technique was later integrated with carbon nanotube/polymer composite protection layers 26 and additional alkyl ammonium salts 27 to extend the operational stability to tens of minutes. A more efficient encapsulation was later demonstrated by Crespo-Quesada et al, who reported a CH 3 NH 3 PbI 3 -based photocathode protected by a low-melting alloy of Bi, In and Sn (Field's metal, FM), achieving stability for about 1.5 h under continuous illumination 28 .…”

mentioning

confidence: 99%

Graphite-protected CsPbBr3 perovskite photoanodes functionalised with water oxidation catalyst for oxygen evolution in water

et al. 2019

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Metal-halide perovskites have been widely investigated in the photovoltaic sector due to their promising optoelectronic properties and inexpensive fabrication techniques based on solution processing. Here we report the development of inorganic CsPbBr 3 -based photoanodes for direct photoelectrochemical oxygen evolution from aqueous electrolytes. We use a commercial thermal graphite sheet and a mesoporous carbon scaffold to encapsulate CsPbBr 3 as an inexpensive and efficient protection strategy. We achieve a record stability of 30 h in aqueous electrolyte under constant simulated solar illumination, with currents above 2 mA cm −2 at 1.23 V RHE . We further demonstrate the versatility of our approach by grafting a molecular Ir-based water oxidation catalyst on the electrolyte-facing surface of the sealing graphite sheet, which cathodically shifts the onset potential of the composite photoanode due to accelerated charge transfer. These results suggest an efficient route to develop stable halide perovskite based electrodes for photoelectrochemical solar fuel generation.

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Surface-functionalized perovskite films for stable photoelectrochemical water splitting

Abstract: Integration of Ni passivation and surface functionalization with hydrophobic ammonium cations has been demonstrated to enhance the stability of perovskite to moisture. The functionalized perovskite photoanode can perform steady water oxidation for more than 30 min.

Cited by 70 publications

References 22 publications

Perovskite Oxide Based Electrodes for High‐Performance Photoelectrochemical Water Splitting

Perovskite Oxide Based Electrodes for High‐Performance Photoelectrochemical Water Splitting

Scalable Triple Cation Mixed Halide Perovskite–BiVO₄ Tandems for Bias‐Free Water Splitting

Graphite-protected CsPbBr3 perovskite photoanodes functionalised with water oxidation catalyst for oxygen evolution in water

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Surface-functionalized perovskite films for stable photoelectrochemical water splitting

Abstract: Integration of Ni passivation and surface functionalization with hydrophobic ammonium cations has been demonstrated to enhance the stability of perovskite to moisture. The functionalized perovskite photoanode can perform steady water oxidation for more than 30 min.

Cited by 70 publications

References 22 publications

Perovskite Oxide Based Electrodes for High‐Performance Photoelectrochemical Water Splitting

Perovskite Oxide Based Electrodes for High‐Performance Photoelectrochemical Water Splitting

Scalable Triple Cation Mixed Halide Perovskite–BiVO4 Tandems for Bias‐Free Water Splitting

Graphite-protected CsPbBr3 perovskite photoanodes functionalised with water oxidation catalyst for oxygen evolution in water

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Scalable Triple Cation Mixed Halide Perovskite–BiVO₄ Tandems for Bias‐Free Water Splitting