Tailoring Competitive Adsorption Sites by Oxygen‐Vacancy on Cobalt Oxides to Enhance the Electrooxidation of Biomass

Advanced Materials, Год журнала: 2021, Номер 34(2)

Опубликована: Окт. 17, 2021

The electrooxidation of 5-hydroxymethylfurfural (HMF) offers a promising green route to attain high-value chemicals from biomass. HMF reaction (HMFOR) is complicated process involving the combined adsorption and coupling organic molecules OH- on electrode surface. An in-depth understanding these sites processes electrocatalysts fundamentally important. Herein, behavior , role oxygen vacancy Co3 O4 are initially unraveled. Correspondingly, instead competitive metal sites, it observed that can fill into (Vo) prior couple with through lattice oxidation process, which could accelerate rate-determining step dehydrogenation 5-hydroxymethyl-2-furancarboxylic acid (HMFCA) intermediates. With modulated as-designed Vo-Co3 shows excellent activity for HMFOR earlier potential 90 120 mV at 10 mA cm-2 in 1 m KOH PBS solution. This work sheds insight catalytic mechanism vacancy, benefits designing novel modulate multi-molecules behaviors.

Язык: Английский

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Heterogeneous‐Interface‐Enhanced Adsorption of Organic and Hydroxyl for Biomass Electrooxidation

Advanced Materials, Год журнала: 2022, Номер 34(42)

Опубликована: Авг. 29, 2022

Electrocatalytic oxidation of 5-hydroxymethylfurfural (HMF) provides an efficient way to obtain high-value-added biomass-derived chemicals. Compared with other transition metal oxides, CuO exhibits poor oxygen evolution reaction performance, leading high Faraday efficiency for HMF oxidation. However, the weak adsorption and activation ability OH- species restricts its further development. Herein, CuO-PdO heterogeneous interface is successfully constructed, resulting in advanced onset-potential (HMFOR), a higher current density than CuO. The results open-circuit potential, situ infrared spectroscopy, theoretical calculations indicate that introduction PdO enhances capacity organic molecule. Meanwhile, promotes species, as demonstrated by zeta potential electrochemical measurements. This work elucidates enhancement mechanism interfaces constructive guidance designing multicomponent electrocatalysts electrocatalytic reactions.

Язык: Английский

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Efficient Electrocatalytic Oxidation of 5-Hydroxymethylfurfural Coupled with 4-Nitrophenol Hydrogenation in a Water System

ACS Catalysis, Год журнала: 2022, Номер 12(2), С. 1545 - 1557

Опубликована: Янв. 11, 2022

Electrocatalytic conversion of biomass-derived 5-hydroxymethylfurfural (HMF) to value-added 2,5-furandicarboxylic acid (FDCA) is great significance for sustainable chemical production. The key challenge establish an electrocatalytic system with a wide potential window, which can selectively oxidize HMF FDCA without causing water oxidation. In this study, Cu foam decorated Cu(OH)2 (CF-Cu(OH)2) was successfully fabricated as efficient catalyst, and CuOOH active species generated by electrochemistry were demonstrated the main catalytic sites As result, current density CF-Cu(OH)2 reached up 198.2 mA/cm2 (100 mM HMF, 1.0 M KOH, 0.8 V vs Ag/AgCl), high faradic efficiency close 100% production (yield: 98.7%) realized. Moreover, we reveal mechanism electro-oxidation further provide insight into oxidation pathway HMF. A paired electrochemical exhibits superior performance synergetic reactions (HMF 4-NP reduction). Therefore, work proposes strategy simultaneously produce two types chemicals at both electrodes, be applied in other systems green synthesis organic compounds.

Язык: Английский

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Water electrolysis for hydrogen production: from hybrid systems to self-powered/catalyzed devices

Energy & Environmental Science, Год журнала: 2023, Номер 17(1), С. 49 - 113

Опубликована: Ноя. 7, 2023

This perspective highlights recent advancements in innovative strategies to provide valuable insights into the potential for energy-saving hydrogen production through water electrolysis.

Язык: Английский

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Efficient Electrooxidation of 5‐Hydroxymethylfurfural Using Co‐Doped Ni₃S₂ Catalyst: Promising for H₂ Production under Industrial‐Level Current Density

Advanced Science, Год журнала: 2022, Номер 9(17)

Опубликована: Апрель 15, 2022

Abstract Replacing oxygen evolution reaction (OER) by electrooxidations of organic compounds has been considered as a promising approach to enhance the energy conversion efficiency electrolytic water splitting proces. Developing efficient electrocatalysts with low potentials and high current densities is crucial for large‐scale productions H 2 other value‐added chemicals. Herein, non‐noble metal Co‐doped Ni 3 S self‐supported on foam (NF) substrate are prepared used catalysts 5‐hydroxymethylfurfural (HMF) oxidation (HMFOR) under alkaline aqueous conditions. For HMFOR, Co 0.4 NiS@NF electode achieves an extremely onset potential 0.9 V versus reversible hydrogen electrode (RHE) records large density 497 mA cm –2 at 1.45 RHE HMFOR. During HMFOR‐assisted production, yield rates 2,5‐furandicarboxylic acid (FDCA) in 10 mL electrolyte containing × −3 M HMF 330.4 µmol h –1 1000 , respectively. The electrocatalyst displays good cycling durability toward HMFOR can be electrooxidation biomass‐derived findings present facile route based heteroatom doping fabricate high‐performance catalyses that facilitate industrial‐level production coupling conventional HER cathodic processes

Язык: Английский

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Earth‐Abundant Metal‐Based Electrocatalysts Promoted Anodic Reaction in Hybrid Water Electrolysis for Efficient Hydrogen Production: Recent Progress and Perspectives

Advanced Energy Materials, Год журнала: 2022, Номер 12(25)

Опубликована: Май 20, 2022

Abstract Exploring advanced technologies to efficiently produce green hydrogen energy is imperative alleviate the crisis and environmental pollution. Conventional overall water electrolysis (OWE) has been regarded as a promising approach for effective H 2 production, however, it largely restricted by sluggish kinetics of anodic oxygen evolution reaction (OER). Coupling kinetically favorable reactions, such biomass‐derived compound oxidation pollutant degradation, with (HER) in hybrid (HWE), can not only solve biomass recycling emission problems but also save cost clean generation. Hence, various earth‐abundant electrocatalysts have developed catalyze those yet some tedious preparation unsatisfactory performance still exist. Given gap between research practical applications, this review summarizes recent progress diverse alternative reactions over last five years together their application HWE systems. An in‐depth understanding different mechanisms assessments toward discussed further enhance efficiency. The advantages, differences, critical issues systems are thoroughly well, providing new avenue low‐voltage production from renewable resources waste products.

Язык: Английский

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Integrated Catalytic Sites for Highly Efficient Electrochemical Oxidation of the Aldehyde and Hydroxyl Groups in 5-Hydroxymethylfurfural

ACS Catalysis, Год журнала: 2022, Номер 12(7), С. 4242 - 4251

Опубликована: Март 23, 2022

5-Hydroxymethylfurfural oxidation reaction (HMFOR) is regarded as a promising approach to attain biomass-derived high-value chemical products. As the HMFOR process complicated, and two-step of aldehyde group hydroxyl in 5-hydroxymethylfurfural (HMF) typically involved, it fundamentally significant understand different catalytic processes for HMFOR. In this work, we identify direct synergistic types on cobalt oxide catalysts. For process, Co3O4 was found have higher activity than due barrier hydration oxidation. By studying behaviors transition metal oxides, NiO exhibited optimal owing appropriate OH adsorption energy alcohol dehydrogenation. Therefore, performance achieved by accurately introducing Ni into tetrahedral sites spinel oxides improve activity. The integrated enhanced overall with 92.42% FDCA yield 90.35% faradaic efficiency. This work provides perspective designing efficient electrocatalysts

Язык: Английский

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Progress and Perspectives for Solar‐Driven Water Electrolysis to Produce Green Hydrogen

Advanced Energy Materials, Год журнала: 2023, Номер 13(16)

Опубликована: Март 9, 2023

Abstract Solar‐driven water electrolysis has been considered to be a promising route produce green hydrogen, because the conventional system is not completely renewable as it requires power from nonrenewable fossil fuel sources. This review emphasizes strategies for solar‐driven electrolysis, including construction of photovoltaic (PV)‐water electrolyzer systems, PV‐rechargeable energy storage device‐water systems with solar sole input energy, and photoelectrochemical splitting systems. The basic discussions above are first presented. Meanwhile, replacing oxygen evolution reaction electrooxidation organic compounds can effectively improve efficiency splitting. Also, seawater greatly broadens practical applications due abundant reserves seawater. Recent years have witnessed great development in field electrolysis. recent research area subsequently reviewed. Finally, perspectives on existing challenges along some opportunities further provided.

Язык: Английский

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CeO2 as an “electron pump” to boost the performance of Co4N in electrocatalytic hydrogen evolution, oxygen evolution and biomass oxidation valorization

Applied Catalysis B Environment and Energy, Год журнала: 2023, Номер 325, С. 122364 - 122364

Опубликована: Янв. 3, 2023

Язык: Английский

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Bifunctional integrated electrode for high-efficient hydrogen production coupled with 5-hydroxymethylfurfural oxidation

Applied Catalysis B Environment and Energy, Год журнала: 2022, Номер 312, С. 121400 - 121400

Опубликована: Апрель 13, 2022

Язык: Английский

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