Fluorine-doped CuBi2O4 nanorod arrays for enhanced photoelectrochemical oxygen reduction reaction toward H2O2 production

Xu, Yulu; Li, Zixin; Hu, Xia; Wang, Xiang; Chen, Wei; Zhou, Shujing; Li, Jinjing; Qi, Chenze; Ma, Dekun

doi:10.1016/j.jcat.2022.04.034

Cited by 21 publications

(25 citation statements)

References 28 publications

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“…25,26 In addition, the peak of Au/CN-100 in the Au/CN-X sample is the weakest, which means that the e − and h + recombination rate is the lowest. 27 The results indicate that Au loading maximizes the synergistic effect between Au and CN in the heterojunction, which is beneficial for optimizing the photocatalytic activity. 28 Fig.…”

Section: Resultsmentioning

confidence: 92%

“…25,26 In addition, the peak of Au/ CN-100 in the Au/CN-X sample is the weakest, which means that the e À and h + recombination rate is the lowest. 27 The results indicate that Au loading maximizes the synergistic effect between Au and CN in the heterojunction, which is beneficial for optimizing the photocatalytic activity. 28 29 The TRPL decay curves are fitted by the following biexponential model (eqn (3)), where t 1 and t 2 are the short and long lifetimes, respectively, while A 1 and A 2 are the corresponding amplitudes.…”

Section: Dft Calculationsmentioning

confidence: 92%

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Visible light-driven H₂O₂ synthesis over Au/C₃N₄: medium-sized Au nanoparticles exhibiting suitable built-in electric fields and inhibiting reverse H₂O₂ decomposition

Song

Shao

Chen

et al. 2022

Phys. Chem. Chem. Phys.

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Section: Resultsmentioning

confidence: 92%

Section: Dft Calculationsmentioning

confidence: 92%

Visible light-driven H₂O₂ synthesis over Au/C₃N₄: medium-sized Au nanoparticles exhibiting suitable built-in electric fields and inhibiting reverse H₂O₂ decomposition

Song

Shao

Chen

et al. 2022

Phys. Chem. Chem. Phys.

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“…There was nearly no noticeable variation in morphology (Figure S6b) and component (Figure S6c) for CuS@MnS after the PEC process, further indicating its well structural stability. The CuS@MnS photocathode exhibited a competitive level for H 2 O 2 production compared with most of the reported photocathodes in recent years (Figure c). ,,,− Therefore, the CuS@MnS photocathode was cost-effective and highly efficienct for the PEC ORR to produce H 2 O 2 .…”

Section: Resultsmentioning

confidence: 99%

Light-Driven Fuel Cell with a 2D/3D Hierarchical CuS@MnS Z-Scheme Catalyst for H₂O₂ Generation

Yang

Zhang

2023

ACS Appl. Mater. Interfaces

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A photoelectrocatalytic (PEC) oxygen reduction reaction (ORR) strategy with fuel-efficient and cost-effective catalysts for on-demand hydrogen peroxide (H 2 O 2 ) production is booming as an attractive alternative to the conventional anthraquinone process. Herein, we constructed a novel twodimensional (2D)/three-dimensional (3D) hierarchical CuS@MnS p−p Z-scheme catalyst with full spectrum absorption and strong coupling interface by regulating the crystal structure, morphology, and photocharge transfer mechanism, which was used as a photocathode for PEC synthesis of H 2 O 2 with a yield of 1.65 mM within 180 min. Taking advantage of a coupling strategy with Sn 3 O 4 /Ni foam, the as-prepared two-compartment cell with water oxidation reaction and ORR exhibited boosted activity and stability for the dual production of H 2 O 2 . An energy-saving H 2 O 2 generation system was also constructed with a direct hydrazine/O 2 fuel cell, realizing the significant advantage in reducing electricity consumption during the H 2 O 2 synthesis. Moreover, the onsite generation of H 2 O 2 remarkably accelerated the degradation of pollutants via a cascade heterogeneous Fenton reaction with a Fe anode. This work provides a new strategy for designing a multifunctional PEC system for the production of high-value chemicals, energy recovery, and pollutant degradation.

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“…In addition, the defined structure apported by the COF platform allows to stablish structural‐property relationships, [28] such as the selectivity enhancement by integration of fluorine atoms in a defined sp 2 skeleton as it is demonstrated in the present work. It is worth mentioning that DFTAPB‐TFTA‐COF outperforms other fluorinated materials including F‐doped: carbons, [19b] carbon nanotubes [19c] or transition metal oxides [29] . On the other hand, the crystalline structure of the DFTAPB‐TFTA‐COF allows the control of the electrocatalyst active sites at atomic‐level.…”

Section: Resultsmentioning

confidence: 99%

Scalable Synthesis and Electrocatalytic Performance of Highly Fluorinated Covalent Organic Frameworks for Oxygen Reduction

Martínez‐Fernández,

Martínez‐Periñán,

de la Peña Ruigómez

et al. 2023

Angew Chem Int Ed

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In this study, we present a novel approach for the synthesis of covalent organic frameworks (COFs) that overcomes the common limitations of non‐scalable solvothermal procedures. Our method allows for the room‐temperature and scalable synthesis of a highly fluorinated DFTAPB‐TFTA‐COF, which exhibits intrinsic hydrophobicity. We used DFT‐based calculations to elucidate the role of the fluorine atoms in enhancing the crystallinity of the material through corrugation effects, resulting in maximized interlayer interactions, as disclosed both from PXRD structural resolution and theoretical simulations. We further investigated the electrocatalytic properties of this material towards the oxygen reduction reaction (ORR). Our results show that the fluorinated COF produces hydrogen peroxide selectively with low overpotential (0.062 V) and high turnover frequency (0.0757 s‐1) without the addition of any conductive additives. These values are among the best reported for non‐pyrolyzed and metal‐free electrocatalysts. Finally, we employed DFT‐based calculations to analyse the reaction mechanism, highlighting the crucial role of the fluorine atom in the active site assembly. Our findings shed light on the potential of fluorinated COFs as promising electrocatalysts for the ORR, as well as their potential applications in other fields.

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Fluorine-doped CuBi2O4 nanorod arrays for enhanced photoelectrochemical oxygen reduction reaction toward H2O2 production

Cited by 21 publications

References 28 publications

Visible light-driven H₂O₂ synthesis over Au/C₃N₄: medium-sized Au nanoparticles exhibiting suitable built-in electric fields and inhibiting reverse H₂O₂ decomposition

Visible light-driven H₂O₂ synthesis over Au/C₃N₄: medium-sized Au nanoparticles exhibiting suitable built-in electric fields and inhibiting reverse H₂O₂ decomposition

Light-Driven Fuel Cell with a 2D/3D Hierarchical CuS@MnS Z-Scheme Catalyst for H₂O₂ Generation

Scalable Synthesis and Electrocatalytic Performance of Highly Fluorinated Covalent Organic Frameworks for Oxygen Reduction

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Fluorine-doped CuBi2O4 nanorod arrays for enhanced photoelectrochemical oxygen reduction reaction toward H2O2 production

Cited by 21 publications

References 28 publications

Visible light-driven H2O2 synthesis over Au/C3N4: medium-sized Au nanoparticles exhibiting suitable built-in electric fields and inhibiting reverse H2O2 decomposition

Visible light-driven H2O2 synthesis over Au/C3N4: medium-sized Au nanoparticles exhibiting suitable built-in electric fields and inhibiting reverse H2O2 decomposition

Light-Driven Fuel Cell with a 2D/3D Hierarchical CuS@MnS Z-Scheme Catalyst for H2O2 Generation

Scalable Synthesis and Electrocatalytic Performance of Highly Fluorinated Covalent Organic Frameworks for Oxygen Reduction

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Visible light-driven H₂O₂ synthesis over Au/C₃N₄: medium-sized Au nanoparticles exhibiting suitable built-in electric fields and inhibiting reverse H₂O₂ decomposition

Visible light-driven H₂O₂ synthesis over Au/C₃N₄: medium-sized Au nanoparticles exhibiting suitable built-in electric fields and inhibiting reverse H₂O₂ decomposition

Light-Driven Fuel Cell with a 2D/3D Hierarchical CuS@MnS Z-Scheme Catalyst for H₂O₂ Generation