Unassisted solar water splitting with 9.8% efficiency and over 100 h stability based on Si solar cells and photoelectrodes catalyzed by bifunctional Ni–Mo/Ni

Fan, Ronglei; Cheng, Shaobo; Huang, Guanping; Wang, Yongjie; Zhang, Yazhou; Vanka, Srinivas; Botton, Gianluigi A.; Mi, Zetian; Shen, Mingrong

doi:10.1039/c8ta10165e

Cited by 71 publications

(68 citation statements)

References 41 publications

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“…ABPE of photoanode was calculated from the corresponding LSV curves using the equation:54

ABPE (%) = \frac{([], J_{ph} (mA {cm}^{- 2}) \times [1.23 - V_{app} (V) \times η])}{P_{light} (mW {cm}^{- 2})} \times 100

where J ph is the photocurrent density, and V app is the applied bias derived from the corresponding LSV curves, η is faradaic efficiency and supposed to be 1, and P light is the incident power density, respectively.…”

Section: Methodsmentioning

confidence: 99%

A Novel Approach for Achieving High‐Efficiency Photoelectrochemical Water Oxidation in InGaN Nanorods Grown on Si System: MXene Nanosheets as Multifunctional Interfacial Modifier

Lin

Zhang

et al. 2020

Adv Funct Materials

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“…ABPE of photoanode was calculated from the corresponding LSV curves using the equation:54

ABPE (%) = \frac{([], J_{ph} (mA {cm}^{- 2}) \times [1.23 - V_{app} (V) \times η])}{P_{light} (mW {cm}^{- 2})} \times 100

Section: Methodsmentioning

confidence: 99%

A Novel Approach for Achieving High‐Efficiency Photoelectrochemical Water Oxidation in InGaN Nanorods Grown on Si System: MXene Nanosheets as Multifunctional Interfacial Modifier

Lin

Zhang

et al. 2020

Adv Funct Materials

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“…The increase in current density after 500 cycles might be attributed to the oxidation of the Bi surface to BiO x or Bi(OH) x . Oxidation of the photocatalyst is common, and the surface oxides might act the active center for OER . Figure S5 in the Supporting Information shows the field‐emission (FE‐)SEM images of BOC/BVO/g‐CN‐15, which were taken after the stability test in dark and light conditions.…”

Section: Resultsmentioning

confidence: 99%

Deep Eutectic Solvent‐Assisted Synthesis of Ternary Heterojunctions for the Oxygen Evolution Reaction and Photocatalysis

et al. 2020

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have reportedb ismuth oxyhalides (BiOX, X = Cl, I, Br) [12] and their heterojunctions in photocatalytic water splitting, owing to their unique physicochemical properties. [13] Moreover,B iOCl/ BiVO 4 p-n heterojunctions have been reported to enhance the photocatalytic activity and pollutant degradationu nder visiblelight irradiation. [11,14] In ah eterojunction structure, the photocatalytic materials strictly require narrow band gaps, which facilitatev isible-light absorption and proper energy level matching, which in turn facilitates good charget ransfer along with improved oxidation and reductiona bility. [15] Accordingly,t ernary heterojunctions can shown otable improvements through the synergistic effect of the multicomponent,w hich gives rise to the efficient separation of photogenerated electron-hole pairs. Buildingaheterostructure between semiconductors is an encouraging technology to improve photocatalytic activity. [16] Heretofore, numerous designed ternary heterojunction systems have been reported and demonstrated clearly enhanced photocatalytic activity compared with binary systems. [16, 17] Therefore, designing ag -C 3 N 4 -based heterojunction is ag ood approach to enhancing the photocatalytic activity of other materials. [18] The metalfree chemical nature, chemical stability,t unable electronic structure, more abundanta nd inexpensive components,a s well as the more appropriate positionofthe top of the valence band and bottom of the conduction band for photocatalytic water splitting have led to g-C 3 N 4 being considered for the development of heterojunctionp hotocatalysts. [19] Since then, g-C 3 N 4 -based composites, such as g- [18b] have been reported.T he photocatalytic activity of heterojunction materials can be explained in water splitting throughe xamination of suitable properties such as visible-light activity,e lectron-hole pair recombination, overpotential of the heterojunction materials, and the stability in the electrolyte solution.Another issue with hierarchical structured materials is that the synthesis is generally difficult,e xpensive, and requirestoxic templates or surfactants as well as careful control of conditions. The increasingl evel of chemical hazards is as erious problem and various environmental regulations need to be complied with. [24] Therefore, there is an ecessity forr eplacing traditional and hazardous organic solvents in chemical routes of materials synthesis to enable as tep towards more sustainable green chemistry. [25] Deep eutectic solvents (DESs) represent an ewer,n ontoxic,i nexpensive class of alternative mixed solvents ystems, formed upon the mixing of varioush ydrogenbondings alts and charge-neutral species, tof orm al ow-melting liquid that is significantly lower melting than that of the two single components andi si deal around room temperature. [26] DESs are coined as green solvents owing to their properties of high viscosity,c onductivity,s urface tension,a nd biodegradability.A saresult, DESs open new and unrivalled chances to improve the sustainab...

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“…where J ph is the photocurrent density at a zero-bias potential and P light is referred to the power density of incident light. For PEC water splitting system with an applied potential, the applied bias photoconversion efficiency (ABPE) in threeelectrode system can reflect the PEC performance of single photoanode and photocathode, which is determined from the following equation: [31] ( ) ( )…”

Section: (3 Of 20)mentioning

confidence: 99%

Modulating Surface/Interface Structure of Emerging InGaN Nanowires for Efficient Photoelectrochemical Water Splitting

Lin

Wang

2020

Adv Funct Materials

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Photoelectrochemical (PEC) water splitting provides a promising approach to convert solar energy into hydrogen. Developing active, stable, and cost-effective semiconductors photoelectrodes is of great significance for achieving high-efficiency and large-scale hydrogen production. InGaN nanowires as an important candidate have gained a great upsurge in solar water splitting due to its tunable gap, high electron mobility, large active area, and excellent chemical stability. To obtain state-of-the-art InGaN nanowires-based photoelectrodes, tremendous efforts have been devoted to enhance light absorption capacity, charge carrier dynamics, and redox activity. In this review, recent advances in InGaN nanowires as photoelectrodes for PEC water splitting are comprehensively presented, with a focus on photoelectrode optimization strategies from the aspects of surface and interface structure modulation including doping engineering, energy band engineering, heterostructure engineering, and micro-nano engineering. The representative applications of InGaN nanowires-based PEC tandem cell are also discussed. Finally, perspectives on remaining challenges and future development are outlined.

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Unassisted solar water splitting with 9.8% efficiency and over 100 h stability based on Si solar cells and photoelectrodes catalyzed by bifunctional Ni–Mo/Ni

Abstract: Designing a highly efficient and stable photoelectrochemical (PEC) tandem cell for unassisted solar water splitting is considered a promising approach for large-scale solar energy storage.

Cited by 71 publications

References 41 publications

A Novel Approach for Achieving High‐Efficiency Photoelectrochemical Water Oxidation in InGaN Nanorods Grown on Si System: MXene Nanosheets as Multifunctional Interfacial Modifier

A Novel Approach for Achieving High‐Efficiency Photoelectrochemical Water Oxidation in InGaN Nanorods Grown on Si System: MXene Nanosheets as Multifunctional Interfacial Modifier

Deep Eutectic Solvent‐Assisted Synthesis of Ternary Heterojunctions for the Oxygen Evolution Reaction and Photocatalysis

Modulating Surface/Interface Structure of Emerging InGaN Nanowires for Efficient Photoelectrochemical Water Splitting

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