Synchronized carrier extraction and injection through boron nitride nanoplatelets in hierarchical BiVO4/CoCr-layered double hydroxides for efficient water oxidation

Mohanta, M K; Sahu, Tushar Kanta; Bhowmick, Sourav; Qureshi, Mohammad

doi:10.1016/j.electacta.2022.140269

Cited by 4 publications

(7 citation statements)

References 35 publications

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“…The ECSA of β-In 2 S 3 -CQDs (197.5 cm 2 ) in Table S6 is significantly higher than that of pure β-In 2 S 3 (1.28 cm 2 ), which indicates the higher specific surface area generated by the addition of CQDs. 50 This confirms that the addition of CQDs not only improves charge separation efficiency and lowers charge transfer resistance but also increases the active surface area, resulting in faster kinetics and better catalytic activity. The external quantum efficiency (EQE) (Figure S11) of β-In 2 S 3 -CQDs is found to reach a maximum of 0.7% at 430 nm wavelength.…”

Section: H 2 Osupporting

confidence: 54%

“…C dl is calculated from the current density vs scan rate data (Figure d) in the non-faradaic region (Figure S10). The ECSA of β-In 2 S 3 -CQDs (197.5 cm 2 ) in Table S6 is significantly higher than that of pure β-In 2 S 3 (1.28 cm 2 ), which indicates the higher specific surface area generated by the addition of CQDs . This confirms that the addition of CQDs not only improves charge separation efficiency and lowers charge transfer resistance but also increases the active surface area, resulting in faster kinetics and better catalytic activity.…”

Section: Resultsmentioning

confidence: 87%

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Hydrogen Peroxide Production with High Solar to Chemical Conversion (0.16%) and Efficient Water Purification Using Carbon Quantum Dots-Modified Indium Sulfide

Tikoo

Koushik

Meduri

2023

ACS Appl. Eng. Mater.

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Photocatalytic production of hydrogen peroxide (H 2 O 2 ) is the need of the hour for green synthesis and sustainability. Herein, we designed hierarchical carbon quantum dots (CQDs)-supported β-indium sulfide (β-In 2 S 3 ) nanoflakes as an efficient catalyst for H 2 O 2 generation via a two-electron oxygen reduction reaction. The composite material exhibited a high H 2 O 2 production rate of 634 μM h −1 , a solar-to-chemical conversion (SCC) efficiency of 0.16%, a high forward rate constant of ∼19 μM min −1 , and a low H 2 O 2 dissociation constant of ∼0.004 min −1 , all of which are significantly higher than those of pure β-In 2 S 3 . Moreover, this material also manifested good water remediation photocatalytic performance by way of removal of 93% chromium-(VI), 58% nickel(II), and 94% rhodamine B in 2 h. The apparent rate constant for chromium(VI) reduction of the composite was 0.023 min −1 , which is 10-fold higher than that of the pure material. β-In 2 S 3 -CQDs exhibited superior results, which can be attributed to their large electrochemical surface area, good light harnessing ability, upconverted photoluminescence, and the ability to act as an electron reservoir preventing recombination.

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Section: H 2 Osupporting

confidence: 54%

Section: Resultsmentioning

confidence: 87%

Hydrogen Peroxide Production with High Solar to Chemical Conversion (0.16%) and Efficient Water Purification Using Carbon Quantum Dots-Modified Indium Sulfide

Tikoo

Koushik

Meduri

2023

ACS Appl. Eng. Mater.

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“…The binding energies of wellagreed Gaussian peaks for B-N and B-O bonds were found to be present at 188.8 eV and 192.5 eV. 32 The prepared hybrid nanodots of PNDs and BDs were confirmed by the FETEM and XPS analysis, as shown in Fig. 1.…”

mentioning

confidence: 76%

“…The binding energies of well-agreed Gaussian peaks for B–N and B–O bonds were found to be present at 188.8 eV and 192.5 eV. 32…”

mentioning

confidence: 83%

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Surface charge-directed borophene–phosphorous nitride nanodot heterojunction supports for enhanced photoelectrochemical performance

Mohanta¹,

Qureshi²

2023

Chem. Commun.

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Photoelectrocatalytic Hydrogen Generation: Current Advances in Materials and Operando Characterization

Zabara,

Ölmez,

Buldu‐Akturk

et al. 2024

Global Challenges

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Photoelectrochemical (PEC) hydrogen generation is a promising technology for green hydrogen production yet faces difficulties in achieving stability and efficiency. The scientific community is pushing toward the development of new electrode materials and a better understanding of the underlying reactions and degradation mechanisms. Advances in photocatalytic materials are being pursued through the development of heterojunctions, tailored crystal nanostructures, doping, and modification of solid‐solid and solid‐electrolyte interfaces. Operando and in situ techniques are utilized to deconvolute the charge transfer mechanisms and degradation pathways. In this review, both materials development and Operando characterization are covered for advancing PEC technologies. The recent advances made in the PEC materials are first reviewed including the applied improvement strategies for transition metal oxides, nitrites, chalcogenides, Si, and group III‐V semiconductor materials. The efficiency, stability, scalability, and electrical conductivity of the aforementioned materials along with the improvement strategies are compared. Next, the Operando characterization methods and cite selected studies applied for PEC electrodes are described. Operando studies are very successful in elucidating the reaction mechanisms, degradation pathways, and charge transfer phenomena in PEC electrodes. Finally, the standing challenges and the potential opportunities are discussed by providing recommendations for designing more efficient and electrochemically stable PEC electrodes.

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Synchronized carrier extraction and injection through boron nitride nanoplatelets in hierarchical BiVO4/CoCr-layered double hydroxides for efficient water oxidation

Cited by 4 publications

References 35 publications

Hydrogen Peroxide Production with High Solar to Chemical Conversion (0.16%) and Efficient Water Purification Using Carbon Quantum Dots-Modified Indium Sulfide

Hydrogen Peroxide Production with High Solar to Chemical Conversion (0.16%) and Efficient Water Purification Using Carbon Quantum Dots-Modified Indium Sulfide

Surface charge-directed borophene–phosphorous nitride nanodot heterojunction supports for enhanced photoelectrochemical performance

Photoelectrocatalytic Hydrogen Generation: Current Advances in Materials and Operando Characterization

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