Designing Oxide Catalysts for Oxygen Electrocatalysis: Insights from Mechanism to Application

Nano-Micro Letters, Journal Year: 2023, Volume and Issue: 15(1)

Published: July 29, 2023

Abstract The electrochemical oxygen reduction reaction (ORR) and evolution (OER) are fundamental processes in a range of energy conversion devices such as fuel cells metal–air batteries. ORR OER both have significant activation barriers, which severely limit the overall performance that utilize ORR/OER. Meanwhile, is another very important involving has been widely investigated. occurs aqueous solutions via two pathways: direct 4-electron or 2-electron pathways from O 2 to water (H O) hydrogen peroxide ). Noble metal electrocatalysts often used catalyze ORR, despite fact noble certain intrinsic limitations, low storage. Thus, it urgent develop more active stable low-cost electrocatalysts, especially for severe environments (e.g., acidic media). Theoretically, an ideal electrocatalyst should provide adequate binding species. Transition metals not belonging platinum group metal-based oxides substance could give d orbital species binding. As result, transition regarded substitute typical precious electrocatalysts. However, development oxide catalysts reactions still faces challenges, e.g., catalytic activity, stability, cost, mechanism. We discuss principles underlying design catalysts, including influence crystal structure, electronic structure on their performance. also challenges associated with developing potential strategies overcome these challenges.

Language: Английский

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Work Function‐Guided Electrocatalyst Design

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(29)

Published: April 29, 2024

Abstract The development of high‐performance electrocatalysts for energy conversion reactions is crucial advancing global sustainability. design catalysts based on their electronic properties (e.g., work function) has gained significant attention recently. Although numerous reviews electrocatalysis have been provided, no such reports function‐guided electrocatalyst are available. Herein, a comprehensive summary the latest advancements in diverse electrochemical applications provided. This includes function‐based catalytic activity descriptors, and both monolithic heterostructural catalysts. measurement function first discussed descriptors various fully analyzed. Subsequently, function‐regulated material‐electrolyte interfacial electron transfer (IET) employed catalyst design, methods regulating optimizing performance discussed. In addition, key strategies tuning function‐governed material‐material IET examined. Finally, perspectives determination, put forward to guide future research. paves way rational efficient sustainable applications.

Language: Английский

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Dual-Doped Nickel Sulfide for Electro-Upgrading Polyethylene Terephthalate into Valuable Chemicals and Hydrogen Fuel

Nano-Micro Letters, Journal Year: 2023, Volume and Issue: 15(1)

Published: Sept. 11, 2023

Abstract Electro-upcycling of plastic waste into value-added chemicals/fuels is an attractive and sustainable way for management. Recently, electrocatalytically converting polyethylene terephthalate (PET) formate hydrogen has aroused great interest, while developing low-cost catalysts with high efficiency selectivity the central ethylene glycol (PET monomer) oxidation reaction (EGOR) remains a challenge. Herein, high-performance nickel sulfide catalyst electro-upcycling designed by cobalt chloride co-doping strategy. Benefiting from interconnected ultrathin nanosheet architecture, dual dopants induced up-shifting d band centre facilitated in situ structural reconstruction, Co Cl co-doped Ni 3 S 2 (Co, Cl-NiS) outperforms single-doped undoped analogues EGOR. The self-evolved sulfide@oxyhydroxide heterostructure catalyzes EG-to-formate conversion Faradic (> 92%) 91%) at current densities 400 mA cm −2 ). Besides producing formate, bifunctional Co, Cl-NiS-assisted PET hydrolysate electrolyzer can achieve production rate 50.26 mmol h −1 M KOH, 1.7 V. This study not only demonstrates dual-doping strategy to engineer cost-effective electrochemical processes, but also provides green upcycling simultaneous energy-saving production.

Language: Английский

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Dual doping: An emerging strategy to construct efficient metal catalysts for water electrolysis

EcoEnergy, Journal Year: 2024, Volume and Issue: 2(1), P. 114 - 140

Published: March 1, 2024

Abstract Developing efficient electrocatalysts for water electrolysis is critical sustainable hydrogen energy development. For enhancing the catalytic performance of metal catalysts, dual doping has attracted enormous interest its high effectiveness and facile realization. Dual effective tuning electronic properties, electrical conductivity, populating active sites, improving stability catalysts. In this review, recent developments in cation–cation, cation–anion, anion–anion dual‐doped catalysts splitting are comprehensively summarized discussed. An emphasis put on illustrating how regulates external internal properties boosts Additionally, perspectives pointed out to guide future research engineering high‐performance heteroatom‐doped electrocatalysts.

Language: Английский

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Upcycling of plastic wastes for hydrogen production: Advances and perspectives

Renewable and Sustainable Energy Reviews, Journal Year: 2024, Volume and Issue: 195, P. 114333 - 114333

Published: Feb. 27, 2024

The abundant plastic wastes become an imperative global issue, and how to handle these organic gains growing scientific industrial interest. Recently, converting into hydrogen fuel has been investigated, the "waste-to-value" practice accelerates circular economy. To accelerate development of plastic-to-hydrogen conversion, in this review, recent advances conversion via thermochemical, photocatalytic, electrocatalytic routes are analyzed. All thermo-, photo-, electrochemical processes can transform different hydrogen, production efficiency depends heavily on selected techniques, operating parameters, applied catalysts. application rational-designed catalysts promote selective from feedstocks. Further studies process optimization, cost-effective catalyst design, mechanism investigation needed.

Language: Английский

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Mechanosynthesized electroactive materials for sustainable energy and environmental applications: A critical review

Progress in Materials Science, Journal Year: 2024, Volume and Issue: 145, P. 101299 - 101299

Published: April 16, 2024

Electrochemistry-driven techniques for advanced energy storage/conversion and environmental protection play a crucial role in achieving sustainable development goals. As an indispensable component diverse electrochemical systems, electroactive materials gain soaring interest terms of rational design synthesis. Notably, mechanochemistry-based green powerful synthesis has been widely employed to fabricate materials, given their scalability tunability. Recently, mechanochemically synthesized have applied various fields, leading significant progress. However, systematic analysis these advancements is still missing. Herein, we comprehensively discuss recent achievements mechanosynthesized applications. The mechanochemical introduced, along with different types materials. Subsequently, the review delves into applications conversion/storage systems remediation. structure-performance correlation are illustrated by discussing effects process on internal external properties performance. Lastly, key perspectives this field discussed, including monitoring, field-assisted synthesis, material performance optimization, practical applications, mechanochemistry-driven fuels/chemicals By illustrating current advances related aims shed some light upcoming research synthesis-driven sustainability.

Language: Английский

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NiCo layered double hydroxides/NiFe layered double hydroxides composite (NiCo-LDH/NiFe-LDH) towards efficient oxygen evolution in different water matrices

Chemosphere, Journal Year: 2023, Volume and Issue: 345, P. 140472 - 140472

Published: Oct. 16, 2023

Language: Английский

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Defective nickel sulfide hierarchical structures for efficient electrochemical conversion of plastic waste to value-added chemicals and hydrogen fuel

Green Chemistry, Journal Year: 2023, Volume and Issue: 25(15), P. 5979 - 5988

Published: Jan. 1, 2023

Hierarchical defective nickel sulfide catalysts enable efficient electro-upcycling of plastic waste to value-added chemicals and hydrogen fuel.

Language: Английский

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In Situ Amorphization of Electrocatalysts

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: June 26, 2024

Abstract Electrocatalysis represents an efficient and eco‐friendly approach to energy conversion, enabling the sustainable synthesis of valuable chemicals fuels. The deliberate engineering electrocatalysts is crucial improving efficacy scalability electrocatalysis. Notably, occurrence in situ amorphization within has been observed during various electrochemical processes, influencing conversion efficiency catalytic mechanism understanding. Of note, dynamic transformation catalysts into amorphous structures complex, often leading configurations. Therefore, revealing this process understanding function species are pivotal for elucidating structure‐activity relationship electrocatalysts, which will direct creation highly catalysts. This review examines mechanisms behind structure formation, summarizes characterization methods detecting species, discusses strategies controlling (pre)catalyst properties conditions that influence amorphization. It also emphasizes importance spontaneously formed oxidation reduction reactions. Finally, it addresses challenges electrocatalysts. aiming guide efficient, selective, stable reactions, inspire future advancements field.

Language: Английский

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Inhibiting the Deep Reconstruction of Ni‐Based Interface by Coordination of Chalcogen Anions for Efficient and Stable Glycerol Electrooxidation

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: July 22, 2024

Abstract Recently, Ni‐based chalcogenides havedemonstrated remarkable activity and selectivity for alcohol electrooxidation, but the mechanisms remain debated. This study synthesizes electrodeswith different chalcogen anion coordination on nickel nanorod arrays (NiO x /Ni,NiS /Ni, NiSe /Ni NRAs). NRAsshowcases superior performance (Faradaic efficiency 92.9%) in glycerolelectrooxidation reaction (GOR). In situ spectroscopy reveals that NiSecoordination inhibits deep oxidative reconstruction of interface, preventingNiOOH phase formation during GOR, enhancing stability /NiNRAs. Conversely, NiS NiO lead to with NiOOHphase formation, limiting GOR performance. Differently, competingreaction oxygen evolution (OER) leads deepreconstruction NiSex interface due instability Ni‐Sebonds, inducing degradation dissolution Se components. Furthermechanism investigation elucidates rate‐determining step (RDS) ofGOR at involves oxidation *C 2 H 3 O intermediatesthrough adsorption, favoring stable formate production.Contrarily, RDS , NiOOHinterfaces predominantly focus decarboxylation multi‐carbon intermediates, raisingenergy barriers over‐oxidizing CO . These results providenew insights designing non‐oxide catalysts forefficient electrocatalytic oxidation.

Language: Английский

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