Current progress in developing metal oxide nanoarrays-based photoanodes for photoelectrochemical water splitting

Qiu, Yongcai; Pan, Zhenghui; Chen, Haining; Ye, Daiqi; Guo, Lin; Fan, Zhiyong; Yang, Shihe

doi:10.1016/j.scib.2019.07.017

Cited by 110 publications

(70 citation statements)

References 440 publications

(568 reference statements)

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“…[ 1–4 ] Recently, developing unassisted hydrogen evolution system to achieve zero‐energy supply has become a new research hotspot. [ 5–7 ] For unassisted PEC‐WS system, exploring the state‐of‐the‐art photoelectrode semiconductors and rationally designing the robust structure remain the primary task. [ 8,9 ]…”

Section: Introductionmentioning

confidence: 99%

Highly Efficient InGaN Nanorods Photoelectrode by Constructing Z‐scheme Charge Transfer System for Unbiased Water Splitting

Lin

Zhang

Chai

et al. 2020

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Unbiased photoelectrochemical water splitting for the promising InGaN nanorods photoelectrode is highly desirable, but it is practically hindered by the serious recombination of charge carrier in bulk and surface of InGaN nanorods. Herein, an unbiased Z‐scheme InGaN nanorods/Cu2O nanoparticles heterostructured system with boosted interfacial charge transfer is constructed for the first time. The introduced Cu2O nanoparticles pose double‐sided effect on photoelectrochemical (PEC) performance of InGaN nanorods, which enables a robust hybrid structure and induces weakened light absorption capability simultaneously. As a result, the optimized InGaN/Cu2O‐1.5C photoelectrode with the uniform morphology exhibits an enhanced photocurrent density of ≈170 µA cm−2 at 0 V versus Pt, with 8.5‐fold enhancement compared with pure InGaN nanorods. Comprehensive investigations into experimental results and theoretical calculations reveal that the electrons accumulation and holes depletion of Cu2O facilitate to form a typical Z‐scheme band alignment, thus providing a large photovoltage to drive unbiased water splitting and enhancing the stability of Cu2O. This work provides a novel and facile strategy to achieve InGaN nanorods and other catalyst‐based PEC water splitting without external bias, and to relieve the bottlenecks of charge transfer dynamics at the electrode bulk and electrode/electrolyte interface by constructing Z‐scheme heterostructure.

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Section: Introductionmentioning

confidence: 99%

Highly Efficient InGaN Nanorods Photoelectrode by Constructing Z‐scheme Charge Transfer System for Unbiased Water Splitting

Lin

Zhang

Chai

et al. 2020

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“…These two factors increase the efficiency of charge separation and collection at the electrode/electrolyte interface. In terms of the efficiency of charge transport, the CdS rod arrays supply a direct pathway for photoinduced carrier transportation (Zhao et al, 2015 ; Qiu et al, 2019 ; Xu et al, 2020 ). All the above factors improve the PEC performance and enhance the light energy conversion of the sample.…”

Section: Resultsmentioning

confidence: 99%

Controlled Growth of CdS Nanostep Structured Arrays to Improve Photoelectrochemical Performance

Jiang

Wang

et al. 2020

Front. Chem.

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CdS nanostep-structured arrays were grown on F-doped tin oxide-coated glasses using a two-step hydrothermal method. The CdS arrays consisted of a straight rod acting as backbone and a nanostep-structured morphology on the surface. The morphology of the samples can be tuned by varying the reaction parameters. The phase purity, morphology, and structure of the CdS nanostep-structured arrays were characterized by X-ray diffraction and field emission scanning electron microscopy. The light and photoelectrochemical properties of the samples were estimated by a UV-Vis absorption spectrum and photoelectrochemical cells. The experimental results confirmed that the special nanostep structure is crucial for the remarkable enhancement of the photoelectrochemical performance. Compared with CdS rod arrays, the CdS nanostep-structured arrays showed increased absorption ability and dramatically improved photocurrent and energy conversion efficiency. This work may provide a new approach for improving the properties of photoelectrodes in the future.

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“…A PEC cell’s efficiency depends on applied bias and wavelength of the light irradiation source so that the maximum efficiency expresses the optimized condition. This efficiency can be determined according to the following models: the solar-to-hydrogen conversion efficiency (STH), applied bias photon-to-current efficiency (ABPE), quantum efficiency (QE), incident photon-to-current efficiency (IPCE), and absorbed photon-to-current efficiency (APCE), this latter is also known as internal quantum efficiency [ 10 , 20 , 99 , 106 ].…”

Section: Photoelectrochemical Devices For H 2 Pmentioning

confidence: 99%

The Use of Anodic Oxides in Practical and Sustainable Devices for Energy Conversion and Storage

et al. 2021

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This review addresses the main contributions of anodic oxide films synthesized and designed to overcome the current limitations of practical applications in energy conversion and storage devices. We present some strategies adopted to improve the efficiency, stability, and overall performance of these sustainable technologies operating via photo, photoelectrochemical, and electrochemical processes. The facile and scalable synthesis with strict control of the properties combined with the low-cost, high surface area, chemical stability, and unidirectional orientation of these nanostructures make the anodized oxides attractive for these applications. Assuming different functionalities, TiO2-NT is the widely explored anodic oxide in dye-sensitized solar cells, PEC water-splitting systems, fuel cells, supercapacitors, and batteries. However, other nanostructured anodic films based on WO3, CuxO, ZnO, NiO, SnO, Fe2O3, ZrO2, Nb2O5, and Ta2O5 are also explored and act as the respective active layers in several devices. The use of AAO as a structural material to guide the synthesis is also reported. Although in the development stage, the proof-of-concept of these devices demonstrates the feasibility of using the anodic oxide as a component and opens up new perspectives for the industrial and commercial utilization of these technologies.

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Current progress in developing metal oxide nanoarrays-based photoanodes for photoelectrochemical water splitting

Cited by 110 publications

References 440 publications

Highly Efficient InGaN Nanorods Photoelectrode by Constructing Z‐scheme Charge Transfer System for Unbiased Water Splitting

Highly Efficient InGaN Nanorods Photoelectrode by Constructing Z‐scheme Charge Transfer System for Unbiased Water Splitting

Controlled Growth of CdS Nanostep Structured Arrays to Improve Photoelectrochemical Performance

The Use of Anodic Oxides in Practical and Sustainable Devices for Energy Conversion and Storage

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