Reduced graphene oxide decorated SnO2/BiVO4 photoanode for photoelectrochemical water splitting

Bai, Shouli; Tian, Ke; Meng, Jonathan C.; Zhao, Yingying; Sun, Jianhua; Zhang, Kewei; Feng, Yongjun; Luo, Ruixian; Li, Dianqing; Chen, Aifan

doi:10.1016/j.jallcom.2020.156780

Cited by 35 publications

(10 citation statements)

References 49 publications

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“…The high-resolution XPS spectrum of Fe 2p was fitted with four peaks at binding energies of 709.99 and 724.77 eV, related to Fe 2p 3/2 and Fe 2p 1/2 species, respectively; other peaks located at binding energies of 715.46 and 734.2 eV likely represented satellite peaks of Fe (Figure f) . The XPS results confirm the successful formation of the SnO 2 @BiVO 4 /FN nanocomposite . For comparison, the XPS spectra of the bare BiVO 4 nanostructures are also provided in Figure S20.…”

Section: Resultsmentioning

confidence: 70%

“…38 The XPS results confirm the successful formation of the SnO 2 @BiVO 4 /FN nanocomposite. 27 For comparison, the XPS spectra of the bare BiVO 4 nanostructures are also provided in Figure S20. Compared to the bare BiVO 4 nanostructures, the binding energy positions were shifted toward lower values in the composite, indicating a strong interaction between the components.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…Among the various metal oxides used in hole-blocking layers, SnO 2 nanostructures were found to provide superior performances due to their chemical stability, presence of abundant active catalytic sites, high electrical conductivity, excellent optical properties, and high suitability for hole blocking in BiVO 4 nanostructures . However, the currently available SnO 2 @BiVO 4 nanostructures are associated with several disadvantages such as a poor surface area, low electrical conductivity, a protected aggregation synthesis process, lower selectivity, reduced reliability, and ill-defined active sites, which negatively affect the overall water splitting performance . Consequently, to boost the water oxidation performance, a new type of photoanode has to be developed.…”

Section: Introductionmentioning

confidence: 99%

“…26 However, the currently available SnO 2 @BiVO 4 nanostructures are associated with several disadvantages such as a poor surface area, low electrical conductivity, a protected aggregation synthesis process, lower selectivity, reduced reliability, and ill-defined active sites, which negatively affect the overall water splitting performance. 27 Consequently, to boost the water oxidation performance, a new type of photoanode has to be developed.…”

Section: ■ Introductionmentioning

confidence: 99%

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Effect of Combined Hole Storage and Blocking Interfaces on the Photoelectrochemical Water Splitting Performance of BiVO₄ Photoanodes

Varma

Reddy

et al. 2022

ACS Appl. Energy Mater.

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Solar-driven water splitting using a photoelectrochemical (PEC) mechanism is of great practical interest for developing renewable energy systems. In general, BiVO 4 photoanodes are considered to be a promising candidate for efficient PEC solar energy conversion. However, their solar energy conversion performance is negatively affected by the high recombination rate of electron−hole pairs. Despite the development of numerous techniques, combined attempts to engineer both hole-blocking (bottom) and hole-storage (top) interfaces in BiVO 4 photoanodes are still lacking. Here, we demonstrate the role of SnO 2 hierarchical microspheres and ferrihydrite nanosheets as hole-blocking and hole-storage layers for efficient water oxidation by BiVO 4 photoanodes. Furthermore, the key contributions of the size of the SnO 2 hierarchical microspheres and the thicknesses of the BiVO 4 and FN layers, as well as the role of the active area for illumination, are studied through several analytical techniques. The optimized SnO 2 @BiVO 4 /FN photoanodes exhibited a remarkable photocurrent density of 3.28 ± 0.2 mA/cm 2 at 1.23 V versus RHE, along with excellent stability (10 h). Overall, the results demonstrate that the proposed fabrication method represents a substantial advancement in the development of affordable water splitting cells.

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Section: Resultsmentioning

confidence: 70%

Section: ■ Results and Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effect of Combined Hole Storage and Blocking Interfaces on the Photoelectrochemical Water Splitting Performance of BiVO₄ Photoanodes

Varma

Reddy

et al. 2022

ACS Appl. Energy Mater.

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“…Bozheyev et al [ 14 ] achieved a photocurrent density of 6 × 10 −4 A/cm 2 at 1.23 V RHE and the highest incident photon to current transfer efficiency (IPCE) of 22% at 450 nm by controlling the Mo doping ratio in the magnetron co-sputtered SnO 2 films. Additionally, SnO 2 /BiVO 4 /rGO construction yielded a photocurrent of 2.05 mA/cm 2 at 1.23 V RHE , (about four times of the BiVO 4 alone) and IPCE of ~2.5 times that of BiVO 4 at 400 nm [ 15 ]. Wang et al [ 16 ] fabricated SnO 2 /Ag/SnO 2 tri-layers on float substrate by magnetron sputtering.…”

Section: Introductionmentioning

confidence: 99%

The Impact of Co Doping and Annealing Temperature on the Electrochemical Performance and Structural Characteristics of SnO2 Nanoparticulate Photoanodes

et al. 2022

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Obtaining H2 energy from H2O using the most abundant solar radiation is an outstanding approach to zero pollution. This work focuses on studying the effect of Co doping and calcination on the structure, morphology, and optical properties of spin-coated SnO2 films as well as their photoelectrochemical (PEC) efficiency. The structures and morphologies of the films were investigated by XRD, AFM, and Raman spectra. The results confirmed the preparation of SnO2 of the rutile phase, with crystallite sizes in the range of 18.4–29.2 nm. AFM showed the granular structure and smooth surfaces having limited roughness. UV-Vis spectroscopy showed that the absorption spectra depend on the calcination temperature and the Co content, and the films have optical bandgap (Eg) in the range of 3.67–3.93 eV. The prepared samples were applied for the PEC hydrogen generation after optimizing the sample doping ratio, using electrolyte (HCl, Na2SO4, NaOH), electrode reusability, applied temperature, and monochromatic illumination. Additionally, the electrode stability, thermodynamic parameters, conversion efficiency, number of hydrogen moles, and PEC impedance were evaluated and discussed, while the SnO2 films were used as working electrodes and platinum sheet as an auxiliary or counter electrode (2-electrode system) and both were dipped in the electrolyte. The highest photocurrent (21.25 mA/cm2), number of hydrogen moles (20.4 mmol/h.cm2), incident photon-to-current change efficiency (6.892%@307 nm and +1 V), and the absorbed photon-to-current conversion efficiency (4.61% at ~500 nm and +1 V) were recorded for the 2.5% Co-doped SnO2 photoanode that annealed at 673 K.

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Insights on advanced substrates for controllable fabrication of photoanodes toward efficient and stable photoelectrochemical water splitting

et al. 2023

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Conversion of solar energy into H2 by photoelectrochemical (PEC) water splitting is recognized as an ideal way to address the growing energy crisis and environmental issues. In a typical PEC cell, the construction of photoanodes is crucial to guarantee the high efficiency and stability of PEC reactions, which fundamentally rely on rationally designed semiconductors (as the active materials) and substrates (as the current collectors). In this review work, we start with a brief introduction of the roles of substrates in the PEC process. Then, we provide a systematic overview of representative strategies for the controlled fabrication of photoanodes on rationally designed substrates, including conductive glass, metal, sapphire, silicon, silicon carbide, and flexible substrates. Finally, some prospects concerning the challenges and research directions in this area are proposed.

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Reduced graphene oxide decorated SnO2/BiVO4 photoanode for photoelectrochemical water splitting

Cited by 35 publications

References 49 publications

Effect of Combined Hole Storage and Blocking Interfaces on the Photoelectrochemical Water Splitting Performance of BiVO₄ Photoanodes

Effect of Combined Hole Storage and Blocking Interfaces on the Photoelectrochemical Water Splitting Performance of BiVO₄ Photoanodes

The Impact of Co Doping and Annealing Temperature on the Electrochemical Performance and Structural Characteristics of SnO2 Nanoparticulate Photoanodes

Insights on advanced substrates for controllable fabrication of photoanodes toward efficient and stable photoelectrochemical water splitting

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Reduced graphene oxide decorated SnO2/BiVO4 photoanode for photoelectrochemical water splitting

Cited by 35 publications

References 49 publications

Effect of Combined Hole Storage and Blocking Interfaces on the Photoelectrochemical Water Splitting Performance of BiVO4 Photoanodes

Effect of Combined Hole Storage and Blocking Interfaces on the Photoelectrochemical Water Splitting Performance of BiVO4 Photoanodes

The Impact of Co Doping and Annealing Temperature on the Electrochemical Performance and Structural Characteristics of SnO2 Nanoparticulate Photoanodes

Insights on advanced substrates for controllable fabrication of photoanodes toward efficient and stable photoelectrochemical water splitting

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Effect of Combined Hole Storage and Blocking Interfaces on the Photoelectrochemical Water Splitting Performance of BiVO₄ Photoanodes

Effect of Combined Hole Storage and Blocking Interfaces on the Photoelectrochemical Water Splitting Performance of BiVO₄ Photoanodes