Dual‐Metal Atom Electrocatalysts: Theory, Synthesis, Characterization, and Applications

Advanced Energy Materials, Год журнала: 2021, Номер 12(3)

Опубликована: Дек. 5, 2021

Abstract Electrochemical clean energy conversion and the production of sustainable chemicals are critical in journey to realizing a truly society. To progress electrochemical storage devices commercialization, improving electrocatalyst performance cost utmost importance. Research into dual‐metal atom catalysts (DACs) is rising prominence due advantages these sites over single‐metal (SACs), such as breaking scaling relationships for adsorption reaction intermediates synergistic effects. This review provides an examination fundamental theoretical principles experimental DACs idealized half cells, well fuel before proceeding analyze methods used producing identifying DACs. Current challenges potential future research directions also discussed.

Язык: Английский

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Multi-atom cluster catalysts for efficient electrocatalysis

Chemical Society Reviews, Год журнала: 2022, Номер 51(21), С. 8923 - 8956

Опубликована: Янв. 1, 2022

This review presents recent developments in the synthesis, modulation and characterization of multi-atom cluster catalysts for electrochemical energy applications.

Язык: Английский

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Operando Monitoring and Deciphering the Structural Evolution in Oxygen Evolution Electrocatalysis

Advanced Energy Materials, Год журнала: 2022, Номер 12(8)

Опубликована: Янв. 5, 2022

Abstract The oxygen evolution reaction (OER) acts as the bottleneck of some crucial energy conversion and storage technologies involving water electrolysis, CO 2 metal‐air batteries, among others. challenging sluggish kinetics OER can be overcome via developing highly efficient electrocatalysts, which experience a dynamic structural process during reaction. However, mechanism transformation electrocatalysts structure‐activity correlation in understanding real active sites remain elusive. Fortunately, operando characterizations offer platform to study processes mechanisms electrocatalysts. In this review, using several situ/operando techniques recent advances are elaborated with emphases on tracking recording intermediates electrocatalysis, building link between structure activity/stability Moreover, theoretical considerations also discussed assist characterization understanding. Finally, perspectives provided expected helpful tackle current challenges monitoring unraveling

Язык: Английский

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Reconstruction of Highly Dense Cu−N₄Active Sites in Electrocatalytic Oxygen Reduction Characterized by Operando Synchrotron Radiation

Angewandte Chemie International Edition, Год журнала: 2022, Номер 61(40)

Опубликована: Авг. 22, 2022

The emerging star of single atomic site (SAS) catalyst has been regarded as the most promising Pt-substituted electrocatalyst for oxygen reduction reaction (ORR) in anion-exchange membrane fuel cells (AEMFCs). However, metal loading SAS directly affects whole device performance. Herein, we report a dual nitrogen source coordinated strategy to realize high dense Cu-N4 with 5.61 wt% supported on 3D N-doped carbon nanotubes/graphene structure wherein simultaneously performs superior ORR activity and stability alkaline media. When applied H2 /O2 AEMFC, it could reach an open-circuit voltage 0.90 V peak power density 324 mW cm-2 . Operando synchrotron radiation analyses identify reconstruction from initial /Cu-nanoclusters (NC) subsequent Cu-N3 /Cu-NC under working conditions, which gradually regulate d-band center central balance Gibbs free energy *OOH *O intermediates, benefiting activity.

Язык: Английский

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Strain-induced in situ formation of NiOOH species on Co Co bond for selective electrooxidation of 5-hydroxymethylfurfural and efficient hydrogen production

Applied Catalysis B Environment and Energy, Год журнала: 2022, Номер 305, С. 121072 - 121072

Опубликована: Янв. 6, 2022

Язык: Английский

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