Interfacial built-in electric-field for boosting energy conversion electrocatalysis

Nanoscale Horizons, Journal Year: 2023, Volume and Issue: 8(4), P. 441 - 452

Published: Jan. 1, 2023

A critical review of built-in electric fields for the applications in electrocatalytic reactions is organized by focusing on fundamental concepts, modification strategies, and positive influences promotion catalytic performance.

Language: Английский

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Interfacial Hydrogen Spillover on Pd-TiO₂ with Oxygen Vacancies Promotes Formate Electrooxidation

ACS Energy Letters, Journal Year: 2023, Volume and Issue: 8(9), P. 3945 - 3954

Published: Aug. 28, 2023

Pd-based catalysts are crucial in direct formate fuel cells owing to their high stability and selectivity for the oxidation reaction (FOR) CO2, avoiding carbonaceous poisoning species (e.g., COad, CHx) alkaline media. However, kinetics of electrocatalysts considerably impeded by unfavorable adsorption hydrogen (Had), which serve as primary intermediators occlude active sites. Herein, we crafted electron-rich Pd nanoparticles on a TiO2 support with oxygen vacancies (Pd/Ov-TiO2) improve Had desorption. The as-prepared Pd/Ov-TiO2 exhibited mass activity 4.16 A mgPd–1, outperforming Pd/TiO2 without commercial Pd/C 1.41 2.72 times, respectively. Experimental characterizations density functional theory calculations revealed that oxygen-vacant can concurrently downshift d-band center facilitate spillover, thereby accelerating desorption FOR kinetics. Our findings provide strategy refine broader electrochemical uses.

Language: Английский

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Etched High-Entropy Prussian Blue Analogues as Trifunctional Catalysts for Water, Ethanol, and Urea Electrooxidation

Inorganic Chemistry, Journal Year: 2023, Volume and Issue: 62(28), P. 11271 - 11277

Published: June 29, 2023

The introduction of high-entropy and high specific surface area into Prussian blue analogues (PBAs) has yet to create interest in the field electrocatalytic small-molecule oxidation reactions. Herein, we synthesize a novel class (HE) PBAs with via simple NH3·H2O-etching strategy systematically investigate performance HE-PBA toward water, ethanol, urea Importantly, NH3·H2O-etched (denoted as HE-PBA-e) demonstrated enhanced compared pristine HE-PBA, reaching 10 mA cm-2 potentials 1.56, 1.41, 1.37 V for oxygen evolution reaction (OER), ethanol (EOR), (UOR), respectively. Deep characterizations suggest that NH3·H2O etching treatment not only creates rich nanopores enlarge boosts mass transport electron transfer but also facilitates formation high-valence metal oxides improve intrinsic activity. This demonstration how increasing state metals will serve governing principle rational design more advanced HE-PBAs electrooxidation small molecules.

Language: Английский

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Homogeneous NiMoO4–Co(OH)2 bifunctional heterostructures for electrocatalytic oxygen evolution and urea oxidation reaction

International Journal of Hydrogen Energy, Journal Year: 2023, Volume and Issue: 48(89), P. 34740 - 34749

Published: June 10, 2023

Language: Английский

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Hydrogen spillover as a promising strategy for boosting heterogeneous catalysis and hydrogen storage

Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 471, P. 144691 - 144691

Published: July 8, 2023

Language: Английский

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Synergistically engineering of vacancy and doping in thiospinel to boost electrocatalytic oxygen evolution in alkaline water and seawater

Journal of Colloid and Interface Science, Journal Year: 2023, Volume and Issue: 650, P. 1500 - 1508

Published: July 19, 2023

Language: Английский

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Hydrogen spillover in MoOxRh hierarchical nanosheets boosts alkaline HER catalytic activity

Applied Catalysis B Environment and Energy, Journal Year: 2023, Volume and Issue: 341, P. 123275 - 123275

Published: Sept. 7, 2023

Language: Английский

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Plasmon-Mediated Oxidase-like Activity on Ag@ZnS Heterostructured Hollow Nanowires for Rapid Visual Detection of Nitrite

Inorganic Chemistry, Journal Year: 2023, Volume and Issue: 62(4), P. 1659 - 1666

Published: Jan. 17, 2023

Rational design of fast and sensitive determination nitrite (NO2-) from a complicated actual sample overtakes crucial role in constructing high-efficiency sensing platform. Herein, visual NO2- platform with outstanding selectivity, sensitivity, stability based on surface plasmon resonance (SPR)-enhanced oxidase-like activity has been proposed. Benefiting the intrinsic photocatalytic limited light penetration ZnS, ZnS decorated Ag nanowires (Ag@ZnS) is determined. It demonstrated that electrons are generated efficiently then transferred into hot help localized SPR excitation, thus greatly oxidating colorless 3,3',5,5'-tetramethylbenzidine (TMB) to produce dark blue oxidized TMB (oxTMB). When added reaction system, oxTMB will selectively react generate diazotized oxTMB, leading color change green subsequently yellow. Owing specific recognition between recovery catalytic induced an enhanced colorimetric test wider linear range for determination, ultralow detection limit 0.1 μM, excellent practicability application real samples. This plasmon-enhanced not only provides smart approach realize assay high sensitivity simplicity but also modulates activities.

Language: Английский

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Dual-cation doping precisely reducing the energy barrier of the rate-determining step for promoting oxygen-evolving activity

Inorganic Chemistry Frontiers, Journal Year: 2023, Volume and Issue: 10(7), P. 2067 - 2074

Published: Jan. 1, 2023

A sunflower-like Ir, Fe-codoped Co(OH) 2 catalyst assembled by nanosheets is designed for boosting electrocatalytic OER, where dual-cation doping can significantly decrease the energy barrier of rate-determining step OER.

Language: Английский

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Concurrent alloying and vacancy engineering for intensifying hydrogen spillover towards alcohol–water co-electrolysis

Journal of Materials Chemistry A, Journal Year: 2023, Volume and Issue: 11(33), P. 17609 - 17615

Published: Jan. 1, 2023

A PdRu–RuO 2 heterostructure with a well-defined PdRu alloy and oxygen-vacancy-enriched RuO is constructed to intensify the hydrogen spillover from Ru .

Language: Английский

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