Coupling NiSe₂ Nanoparticles with N-Doped Porous Carbon Enables Efficient and Durable Electrocatalytic Hydrogen Evolution Reaction at pH Values Ranging from 0 to 14

ACS Applied Nano Materials, Год журнала: 2023, Номер 7(1), С. 1138 - 1145

Опубликована: Дек. 20, 2023

Integrating metal-based species with a carbon matrix is promising approach for fabricating inexpensive, durable, and efficient electrocatalysts. Herein, NiSe2-decorated N-doped polyhedra (NC) are prepared as electrocatalysts hydrogen evolution reaction (HER) by template-assisted approach. The optimal NC-NiSe2 delivers extraordinary catalytic activities toward HER in wide pH range, overpotentials of 127 mV 0.5 M H2SO4, 226 1 PBS, 205 KOH to drive current density 10 mA cm–2. In addition, this catalyst undergoes fast kinetics via Volmer–Heyrovsky mechanism exhibits excelent long-term durability 48 h the full media. During electrocatalysis, when electrons pass through NC surface NiSe2 particles, water molecules at active sites reduced, then released. excellent activity mainly benefit from hierarchically porous architecture well synergistic interaction nanoparticles matrix, which not only significantly boost electronic conductivity generate plentiful but also guarantee chemical structural stabilities species. This work unravels deep insights into exploration carbon-supported metal chalcogenides highly full-pH values.

Язык: Английский

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Advanced design strategies for Fe-based metal–organic framework-derived electrocatalysts toward high-performance Zn–air batteries

Energy & Environmental Science, Год журнала: 2024, Номер 17(5), С. 1725 - 1755

Опубликована: Янв. 1, 2024

This article summarizes the regulation strategies of Fe-based MOFs-derived electrocatalysts for ZABs, and provides a prospect their future development.

Язык: Английский

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MXenes to MBenes: Latest development and opportunities for energy storage devices

Materials Today, Год журнала: 2024, Номер 74, С. 121 - 148

Опубликована: Март 5, 2024

Язык: Английский

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Mechanistic Insights into Surfactant-Modulated Electrode–Electrolyte Interface for Steering H₂O₂ Electrosynthesis

Journal of the American Chemical Society, Год журнала: 2024, Номер 146(11), С. 7575 - 7583

Опубликована: Март 11, 2024

Electrocatalytic reactions taking place at the electrified electrode–electrolyte interface involve processes of proton-coupled electron transfer. Interfacial protons are delivered to electrode surface via a H2O-dominated hydrogen-bond network. Less efforts made regulate interfacial proton transfer from perspective Here, we present quaternary ammonium salt cationic surfactants as electrolyte additives for enhancing H2O2 selectivity oxygen reduction reaction (ORR). Through in situ vibrational spectroscopy and molecular dynamics calculation, it is revealed that irreversibly adsorbed on response given bias potential range, leading weakening This decreases kinetics, particularly high potentials, thus suppressing 4-electron ORR pathway achieving highly selective 2-electron toward H2O2. These results highlight opportunity steering H2O-involved electrochemical modulating

Язык: Английский

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Boosting electrochemical oxygen reduction to hydrogen peroxide coupled with organic oxidation

Nature Communications, Год журнала: 2024, Номер 15(1)

Опубликована: Июль 19, 2024

Abstract The electrochemical oxygen reduction reaction (ORR) to produce hydrogen peroxide (H 2 O ) is appealing due its sustainability. However, efficiency compromised by the competing 4e − ORR pathway. In this work, we report a hierarchical carbon nanosheet array electrode with single-atom Ni catalyst synthesized using organic molecule-intercalated layered double hydroxides as precursors. exhibits excellent 2e performance under alkaline conditions and achieves H yield rates of 0.73 mol g cat −1 h in H-cell 5.48 flow cell, outperforming most reported catalysts. experimental results show that atoms selectively adsorb , while nanosheets generate reactive species, synergistically enhancing production. Furthermore, coupling system integrating ethylene glycol oxidation significantly enhances rate 7.30 producing valuable glycolic acid. Moreover, convert electrolyte containing directly into downstream product sodium perborate reduce separation cost further. Techno-economic analysis validates economic viability system.

Язык: Английский

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Introduction of electron-deficient unit in resorcinol-formaldehyde resin to construct donor–acceptor conjugated polymer for enhancing photocatalytic H₂O₂ production

Journal of Materials Chemistry A, Год журнала: 2024, Номер 12(14), С. 8420 - 8428

Опубликована: Янв. 1, 2024

Intramolecular donor–acceptor conjugated polymer was constructed in resorcinol-formaldehyde resin by embedding benzothiadiazole, which can reduce the Gibbs free energy for two-electron oxygen reduction and improve photocatalytic H 2 O evolution.

Язык: Английский

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Electronic Metal‐Support Interactions Boost *OOH Intermediate Generation in Cu/In₂Se₃ for Electrochemical H₂O₂ Production

Angewandte Chemie International Edition, Год журнала: 2024, Номер 63(23)

Опубликована: Апрель 3, 2024

Abstract Two‐electron oxygen reduction reaction (2e − ORR) is a promising method for the synthesis of hydrogen peroxide (H 2 O ). However, high energy barriers generation key *OOH intermediates hinder process 2e ORR. Herein, we prepared copper‐supported indium selenide catalyst (Cu/In Se 3 ) to enhance selectivity and yield ORR by employing an electronic metal–support interactions (EMSIs) strategy. EMSIs‐induced charge rearrangement between metallic Cu In conducive intermediate generation, promoting H production. Theoretical investigations reveal that inclusion significantly lowers barrier impedes 4e pathway, thus favoring formation . The concentration produced Cu/In ~2 times than , shows applications in antibiotic degradation. This research presents valuable approach future utilization EMSIs

Язык: Английский

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Recent Advances on Carbon‐Based Metal‐Free Electrocatalysts for Energy and Chemical Conversions

Advanced Materials, Год журнала: 2024, Номер unknown

Опубликована: Июль 25, 2024

Over the last decade, carbon-based metal-free electrocatalysts (C-MFECs) have become important in electrocatalysis. This field is started thanks to initial discovery that nitrogen atom doped carbon can function as a electrode alkaline fuel cells. A wide variety of nanomaterials, including 0D dots, 1D nanotubes, 2D graphene, and 3D porous carbons, has demonstrated high electrocatalytic performance across applications. These include clean energy generation storage, green chemistry, environmental remediation. The applicability C-MFECs facilitated by effective synthetic approaches, e.g., heteroatom doping, physical/chemical modification. methods enable creation catalysts with properties useful for sustainable transformation storage (e.g., cells, Zn-air batteries, Li-O

Язык: Английский

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Vacancy‐Activated B‐Doping for Efficient 2e‐ Oxygen Reduction through Suppressing H2O2 Decomposition at High Overpotential

Angewandte Chemie International Edition, Год журнала: 2025, Номер unknown

Опубликована: Янв. 8, 2025

Abstract The production of hydrogen peroxide (H 2 O ) through two‐electron oxygen reduction reaction (2e − ORR) has emerged as a more environmentally friendly alternative to the traditional anthraquinone method. Although oxidized carbon catalysts have intensive developed due their high selectivity and activity, yield conversion rate H under overpotential still limited. produced was rapidly consumed by increased intensity reduction, which could ascribe decomposition radicals voltage in catalyst. To overcome this issue, B doped been catalyze 2e ORR with efficient suppressing at potential. Thus, thermal reducing containing groups (OCGs) on graphite construct defects vacancies, situ convert B−C x subunits edge graphene sheets. introduction effectively prevented *O−O bond provided suitable adsorption capacity for *OOH, achieving excellent across wide range. Finally, remarkable 7.91 mmol cm −2 h −1 delivered an industrial current density 600 mA , provide “green” pathway scale‐upable synthesis .

Язык: Английский

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Hydrogen peroxide electrogeneration from O2 electroreduction: A review focusing on carbon electrocatalysts and environmental applications

Chemosphere, Год журнала: 2024, Номер 352, С. 141456 - 141456

Опубликована: Фев. 15, 2024

Язык: Английский

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