Engineering Fe-N4 Electronic Structure with Adjacent Co-N2C2 and Co Nanoclusters on Carbon Nanotubes for Efficient Oxygen Electrocatalysis

Nano-Micro Letters, Год журнала: 2023, Номер 15(1)

Опубликована: Окт. 20, 2023

Regulating the local configuration of atomically dispersed transition-metal atom catalysts is key to oxygen electrocatalysis performance enhancement. Unlike previously reported single-atom or dual-atom configurations, we designed a new type binary-atom catalyst, through engineering Fe-N4 electronic structure with adjacent Co-N2C2 and nitrogen-coordinated Co nanoclusters, as electrocatalysts. The resultant optimized active center favors binding capability intermediates enhances reduction reaction (ORR) activity in both alkaline acid conditions. In addition, anchoring M-N-C atomic sites on highly graphitized carbon supports guarantees efficient charge- mass-transports, escorts high bifunctional catalytic entire catalyst. Further, combination electrochemical studies in-situ X-ray absorption spectroscopy analyses, ORR degradation mechanisms under oxidative conditions during evolution processes were revealed. This work developed catalyst systematically investigates effect environments behavior. It demonstrates strategy for facilitating electrocatalytic stability catalysts.

Язык: Английский

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PtNi-W/C with Atomically Dispersed Tungsten Sites Toward Boosted ORR in Proton Exchange Membrane Fuel Cell Devices

Nano-Micro Letters, Год журнала: 2023, Номер 15(1)

Опубликована: Июнь 2, 2023

The performance of proton exchange membrane fuel cells is heavily dependent on the microstructure electrode catalyst especially at low loadings. This work shows a hybrid electrocatalyst consisting PtNi-W alloy nanocrystals loaded carbon surface with atomically dispersed W sites by two-step straightforward method. Single-atomic can be found surface, which form protonic acid and establish an extended transport network surface. When implemented in assembly as cathode ultra-low loading 0.05 mgPt cm-2, peak power density cell enhanced 64.4% compared to that commercial Pt/C catalyst. theoretical calculation suggests single-atomic possesses favorable energetics toward formation *OOH whereby intermediates efficiently converted further reduced water, revealing interfacial cascade catalysis facilitated W. highlights novel functional design from atomic level enables solve bottle-neck issues device level.

Язык: Английский

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Self‐Supported Earth‐Abundant Carbon‐Based Substrates in Electrocatalysis Landscape: Unleashing the Potentials Toward Paving the Way for Water Splitting and Alcohol Oxidation

Advanced Energy Materials, Год журнала: 2023, Номер 14(16)

Опубликована: Дек. 31, 2023

Abstract In the vast realm of scientific inquiry, pursuit hydrogen fuel production through electrochemical water splitting offers a promising gateway to green energy generation, alleviating challenges posed by resource scarcity. However, conventional encounters hurdles like low efficiency and sluggish oxygen evolution reaction (OER), which prompt searchers seek for alternative oxidation process. Significant strides are made in electrocatalytic research employing polymeric binders, resulting commendable catalytic activity minimal electron migration resistance. Yet, pivotal breakthrough this rapidly evolving field lies innovative conception carbon‐based self‐supported electrocatalysts, heralding trajectory ahead. This review delves into essential electro‐activity parameters establish property‐activity nexus, emphasizing benefits electrodes. Noteworthy advancements demonstrated (HER), OER, overall (OWS), bifunctional HER alcohol (AOR), driven diverse range electrocatalysts. These include structure‐dependent materials such as metal oxides, hydroxides/oxyhydroxides, phosphides, sulfides, selenides, nitrides, carbides, each meticulously tailored with nuanced modifications that shape their distinctive attributes. also acknowledges its opportunities, providing guidance potential directions inspiring interdisciplinary collaboration among scientists.

Язык: Английский

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Entropy stabilization effect and oxygen vacancy in spinel high-entropy oxide promoting sodium ion storage

Electrochimica Acta, Год журнала: 2023, Номер 447, С. 142157 - 142157

Опубликована: Март 2, 2023

Язык: Английский

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A heterogeneous structured C/SnO2/SnSe2@C hybrid: exploring the superior rate performance in sodium ion batteries

Materials Today Chemistry, Год журнала: 2023, Номер 30, С. 101524 - 101524

Опубликована: Апрель 21, 2023

Язык: Английский

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Electronic structure engineering of electrocatalyst for efficient urea oxidation reaction

Nano Energy, Год журнала: 2023, Номер 121, С. 109183 - 109183

Опубликована: Дек. 15, 2023

Язык: Английский

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Recent development and applications of differential electrochemical mass spectrometry in emerging energy conversion and storage solutions

Chemical Society Reviews, Год журнала: 2024, Номер 53(13), С. 6917 - 6959

Опубликована: Янв. 1, 2024

Electrochemical energy conversion and storage are playing an increasingly important role in shaping the sustainable future. Differential electrochemical mass spectrometry (DEMS) offers

Язык: Английский

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Tailoring the high-density active sites via metal-coordinated ionic liquid encapsulated trimetallic core-shell MOF-derived catalysts for superior ORR in flexible Al-air batteries

Energy storage materials, Год журнала: 2024, Номер 70, С. 103447 - 103447

Опубликована: Май 3, 2024

Язык: Английский

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Well‐defined nanostructures of high entropy alloys for electrocatalysis

Exploration, Год журнала: 2024, Номер unknown

Опубликована: Июль 2, 2024

High-entropy alloys (HEAs) have attracted significant attention for electrocatalytic energy conversion by virtue of their promisingly high efficiency, stability, and low cost. Recently, encouraging progress has been made in tuning the structure composition HEAs used electrolyzers fuel cells. However, understanding on synthetic methods structure-property-performance relationship well-defined nanostructures is still inadequate. To gain insight into future research directions electrocatalysis, this paper, commonly to obtain (0D nanoparticles, 1D nanowires, 2D nanosheets/nanoplates, 3D nanoporous structures, other three-dimensional morphologies) are first summarized. Then, authors discuss application several typical reactions, including hydrogen evolution reaction, oxygen reduction alcohol oxidation carbon dioxide nitrogen formic acid reaction. Finally, a practical perspective nanostructured electrocatalysts provided.

Язык: Английский

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Catalytically Active Carbon for Oxygen Reduction Reaction in Energy Conversion: Recent Advances and Future Perspectives

Advanced Science, Год журнала: 2024, Номер 11(22)

Опубликована: Апрель 5, 2024

Abstract The shortage and unevenness of fossil energy sources are affecting the development progress human civilization. technology efficiently converting material resources into for utilization storage is attracting attention researchers. Environmentally friendly biomass materials a treasure to drive new‐generation sources. Electrochemical theory used convert chemical substances electrical energy. In recent years, significant has been made in green economical electrocatalysts oxygen reduction reaction (ORR). Although many reviews have reported around application biomass‐derived catalytically active carbon (CAC) catalysts ORR, these only selected single/partial topic (including synthesis preparation from different sources, structural optimization, or performance enhancement methods based on CAC catalysts, CACs) discussion. There no review that systematically addresses latest synthesis, enhancement, applications related CAC‐based synchronously. This fills gap by providing timely comprehensive summary following sections: exposition basic catalytic principles composition properties various types biomass, analysis traditional popular optimization strategies, practical oxidative electrocatalysts. provides advances provide research directions design ideas catalyst synthesis/optimization contributes industrialization electrocatalysis electric storage.

Язык: Английский

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