Superiority of Dual‐Atom Catalysts in Electrocatalysis: One Step Further Than Single‐Atom Catalysts

Advanced Energy Materials, Journal Year: 2022, Volume and Issue: 12(9)

Published: Jan. 18, 2022

Abstract In recent years, dual‐atom catalysts (DACs) have attracted extensive attention, as an extension of single‐atom (SACs). Compared with SACs, DACs higher metal loading and more complex flexible active sites, thus achieving better catalytic performance providing opportunities for electrocatalysis. This review introduces the research progress in years on how to design new enhance Firstly, advantages increasing are introduced. Then, role changing adsorption condition reactant molecules atoms is discussed. Moreover, ways which can reduce reaction energy barrier key steps change path explored. Catalytic applications different electrocatalytic reactions, including carbon dioxide reduction reaction, oxygen evolution hydrogen nitrogen followed. Finally, a brief summary made challenges prospects

Language: Английский

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Operando characterization techniques for electrocatalysis

Energy & Environmental Science, Journal Year: 2020, Volume and Issue: 13(11), P. 3748 - 3779

Published: Jan. 1, 2020

Significant progress toward the understanding of electrochemical process has been achieved in past decades, owning to advancements operando characterization techniques.

Language: Английский

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Tandem catalysis in electrochemical CO2 reduction reaction

Nano Research, Journal Year: 2021, Volume and Issue: 14(12), P. 4471 - 4486

Published: May 19, 2021

Language: Английский

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Porphyrin and phthalocyanine based covalent organic frameworks for electrocatalysis

Coordination Chemistry Reviews, Journal Year: 2022, Volume and Issue: 464, P. 214563 - 214563

Published: April 22, 2022

Language: Английский

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Effects of the Catalyst Dynamic Changes and Influence of the Reaction Environment on the Performance of Electrochemical CO₂ Reduction

Advanced Materials, Journal Year: 2021, Volume and Issue: 34(25)

Published: Oct. 1, 2021

Abstract Electrochemical reduction of carbon dioxide (CO 2 ) is substantially researched due to its potential for storing intermittent renewable electricity and simultaneously helping mitigating the pressing CO emission concerns. The major challenge electrochemical lies on having good controls this reaction complicated networks unusual sensitivity dynamic changes catalyst structure (chemical states, compositions, facets morphology, etc.), non‐catalyst components at electrode/electrolyte interface, in another word environments. To date, a comprehensive analysis interplays between above catalyst‐dynamic‐changes/reaction environments performance rare, if not none. In review, observed during catalysis are discussed based recent reports reduction. Then, correlated their effects catalytic performance. influences also discussed. Finally, some perspectives future investigations offered with aim understanding origins from environments, which will allow one better control toward desired products.

Language: Английский

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Suppressing the liquid product crossover in electrochemical CO₂ reduction

SmartMat, Journal Year: 2021, Volume and Issue: 2(1), P. 12 - 16

Published: Jan. 12, 2021

Abstract Coupling electrochemical CO 2 reduction (CO R) with a renewable energy source to create high‐value fuels and chemicals is promising strategy in moving toward sustainable global economy. R liquid products, such as formate, acetate, ethanol, propanol, offer high volumetric density are more easily stored transported than their gaseous counterparts. However, significant amount (~30%) of products from flow cell reactor cross the ion exchange membrane, leading substantial loss system‐level Faradaic efficiency. This severe crossover product has—until now—received limited attention. Here, we review methods suppress crossover, including use bipolar membranes, solid‐state electrolytes, cation‐exchange membranes‐based acidic systems. We then outline remaining challenges future prospects for production concentrated .

Language: Английский

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Synergistic Cr₂O₃@Ag Heterostructure Enhanced Electrocatalytic CO₂ Reduction to CO

Advanced Materials, Journal Year: 2022, Volume and Issue: 34(29)

Published: June 10, 2022

The electrocatalytic CO2 RR to produce value-added chemicals and fuels has been recognized as a promising means reduce the reliance on fossil resources; it is, however, hindered due lack of high-performance electrocatalysts. effectiveness sculpturing metal/metal oxides (MMO) heterostructures enhance performance toward well documented, nonetheless, precise synergistic mechanism MMO remains elusive. Herein, an in operando electrochemically synthesized Cr2 O3 -Ag heterostructure electrocatalyst (Cr2 @Ag) is reported for efficient reduction CO. obtained @Ag can readily achieve superb FECO 99.6% at -0.8 V (vs RHE) with high JCO 19.0 mA cm-2 . These studies also confirm that possesses operational stability. Notably, Raman spectroscopy reveal markedly enhanced attributable induced stabilization CO2•- /*COOH intermediates. DFT calculations unveil metallic-Ag-catalyzed CO requires 1.45 eV energy input proceed, which 0.93 higher than MMO-structured @Ag. exemplified approaches this work would be adoptable design development electrocatalysts other important reactions.

Language: Английский

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Modulating the Electronic Structures of Dual‐Atom Catalysts via Coordination Environment Engineering for Boosting CO₂Electroreduction

Angewandte Chemie International Edition, Journal Year: 2022, Volume and Issue: 61(51)

Published: Nov. 1, 2022

Dual-atom catalysts (DACs) have emerged as efficient electrocatalysts for CO2 reduction owing to the synergistic effect between binary metal sites. However, rationally modulating electronic structure of DACs optimize catalytic performance remains a great challenge. Herein, we report modulation three Ni2 (namely, -N7 , -N5 C2 and -N3 C4 ) by regulation coordination environments around dual-atom centres. As result, exhibits significantly improved electrocatalytic activity reduction, not only better than corresponding single-atom Ni catalyst (Ni-N2 ), but also higher DACs. Density functional theory (DFT) calculations revealed that high could be attributed centre resulted proper binding energies COOH* CO* intermediates.

Language: Английский

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Transition Metal Ion Doping on ZIF‐8 Enhances the Electrochemical CO₂ Reduction Reaction

Advanced Materials, Journal Year: 2022, Volume and Issue: 35(43)

Published: Dec. 3, 2022

The electrochemical reduction of CO2 to diverse value-added chemicals is a unique, environmentally friendly approach for curbing greenhouse gas emissions while addressing sluggish catalytic activity and low Faradaic efficiency (FE) electrocatalysts. Here, zeolite-imidazolate-frameworks-8 (ZIF-8) containing various transition metal ions-Ni, Fe, Cu-at varying concentrations upon doping are fabricated the electrocatalytic reaction (CO2 RR) carbon monoxide (CO) without further processing. Atom coordination environments theoretical performance scrutinized via X-ray absorption spectroscopy (XAS) density functional theory (DFT) calculations. Upon optimized Cu on ZIF-8, Cu0.5 Zn0.5 /ZIF-8 achieves high partial current 11.57 mA cm-2 maximum FE CO 88.5% at -1.0 V (versus RHE) with stable over 6 h. Furthermore, electron-rich sp2 C atom facilitates COOH* promotion after leading local effect between zinc-nitrogen (Zn-N4 ) copper-nitrogen (Cu-N4 moieties. Additionally, advanced RR pathway illustrated from perspectives, including pre-H-covered state under RR. findings expand pool efficient metal-organic framework (MOF)-based catalysts, deeming them viable alternatives conventional catalysts.

Language: Английский

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Superscalar Phase Boundaries Derived Multiple Active Sites in SnO₂/Cu₆Sn₅/CuO for Tandem Electroreduction of CO₂ to Formic Acid

Advanced Energy Materials, Journal Year: 2023, Volume and Issue: 13(13)

Published: Feb. 12, 2023

Abstract The electrocatalytic CO 2 reduction reaction (CO RR) to fuels driven by electrocatalysts is a viable strategy for efficient utilization of emitted . RR involves multiple‐steps, including adsorption, activation, hydrogenation, etc. At present, copper‐tin alloy catalysts have shown the capability reduce formic acid or formate. However, their poor adsorption and activation capacities molecules, as well sluggish kinetics in *H supply restrict proton‐coupled electron transfer processes produce acid. In order solve above problems, ultra‐small SnO /Cu 6 Sn 5 /CuO nanocatalysts with superscalar phase boundaries are fabricated laser sputtering. introduction enhances , while CuO promotes H O decomposition provides abundant intermediates, resulting tandem catalytic sites on composite thus leading excellent activity high selectivity Faradic efficiency (FE HCOOH ) at electrode reaches 90.13% along current density 25.2 mA cm −2 −0.95 V versus reversible hydrogen electrode. role multiphase constructed oxides confirmed situ infrared spectroscopy kinetic isotope effects experiments, which consistent design concept.

Language: Английский

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