Dynamic semiconductor-electrolyte interface for sustainable solar water splitting over 600 hours under neutral conditions
Rui Gao,Nhat Truong Nguyen,Tomohiko Nakajima,Jinlu He,Xianhu Liu,Xueyuan Zhang,Lei Wang,Limin Wu +7 more
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TL;DR: In this paper , a NiB layer was formed by tuning the composition of the neutral electrolyte with the additions of nickel and borate species, which improved the PEC performance of the BiVO4 photoanode.
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Abstract: Photoelectrochemical (PEC) water splitting that functions in pH-neutral electrolyte attracts increasing attention to energy demand sustainability. Here, we propose a strategy to in situ form a NiB layer by tuning the composition of the neutral electrolyte with the additions of nickel and borate species, which improves the PEC performance of the BiVO4 photoanode. The NiB/BiVO4 exhibits a photocurrent density of 6.0 mA cm−2 at 1.23 VRHE with an onset potential of 0.2 VRHE under 1 sun illumination. The photoanode displays a photostability of over 600 hours in a neutral electrolyte. The additive of Ni2+ in the electrolyte, which efficiently inhibits the dissolution of NiB, can accelerate the photogenerated charge transfer and enhance the water oxidation kinetics. The borate species with B─O bonds act as a promoter of catalyst activity by accelerating proton-coupled electron transfer. The synergy effect of both species suppresses the surface charge recombination and inhibits the photocorrosion of BiVO4.
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Citations
Ru-P pair sites boost charge transport in hematite photoanodes for exceeding 1% efficient solar water splitting
TL;DR: In this paper , Ru-P diatomic sites were constructed in photoelectrodes to increase the charge carrier transfer rate and extend the carrier lifetime, and the synergy effects of Ru-p sites not only decreased the dopant concentration and maximized the utilization efficiency of dopant, but also increased the charge transfer rate.
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Metal-Organic Framework Glass Catalysts from Melting Glass-Forming Cobalt-Based Zeolitic Imidazolate Framework for Boosting Photoelectrochemical Water Oxidation.
TL;DR: In this paper , a metal-organic framework (MOF) catalysts for photoelectrochemical (PEC) water splitting has been introduced, which can effectively promote charge transfer and separation, improve carrier mobility, accelerate the kinetics of oxygen evolution reaction (OER), and thus improve PEC performance.
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Boosting charge separation and transfer at the boron-triggered BiVO4 interface for efficient and stable solar water splitting
TL;DR: In this article , a simple and effective interface etching strategy on the semiconductor surface to modulate the photoanode/cocatalyst interface, following by the decoration of NiFeBi oxygen evolution catalyst (OEC) for significantly improved oxygen evolution activity and stability of the BiVO4 photoanodes.
25
Engineering Single Pt Atoms on Hybrid Amorphous/Crystalline CoFe Layered Double Hydroxide Accelerates the Charge Transfer for Solar Water Splitting
TL;DR: In this paper , a single-atom catalysts decorated on semiconductors is proposed to accelerate charge separation and transfer on photoelectrochemical water splitting, achieving an overpotential of 230 mV at 10 mA cm−2.
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Cocatalysts-Photoanode Interface in Photoelectrochemical Water Splitting: Understanding and Insights.
Runyu Chen,Li Meng,Weiwei Xu,Liang Li +3 more
TL;DR: Cocatalysts on photoanodes enhance PEC water splitting by reducing surface barriers, but their introduction creates interfacial recombination and carrier transfer issues, necessitating cocatalyst engineering and interface optimization strategies for efficient performance.
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