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

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

Опубликована: Фев. 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.

Язык: Английский

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Enriching the Local Concentration of CO Intermediates on Cu Cavities for the Electrocatalytic Reduction of CO₂ to C₂₊ Products

ACS Applied Materials & Interfaces, Год журнала: 2023, Номер 15(13), С. 16673 - 16679

Опубликована: Март 24, 2023

The electrochemical carbon-dioxide reduction reaction (CO2RR) to high-value multi-carbon (C2+) chemicals provides a hopeful approach store renewable energy and close the carbon cycle. Although copper-based catalysts with porous architecture are considered potential electrocatalysts for CO2 C2+ chemicals, challenges remain in achieving high selectivity partial current density simultaneously practical application. Here, Cu cavity structure by situ electrochemical-reducing Cu2O cavities developed high-performance conversion of fuels. as-described exhibit Faradaic efficiency 75.6 ± 1.8% 605 14 mA cm-2, respectively, at low applied (-0.59 V vs RHE) microfluidic flow cell. Furthermore, Raman tests finite element simulation indicated that can enrich local concentration CO intermediates, thus promoting C-C coupling process. More importantly, should be major through *CO-*CHO pathway as demonstrated spectra functional theory calculations. This work provide ideas insights into designing producing compounds highlight important effect characterization uncovering mechanism.

Язык: Английский

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Design and synthesis of thermally stable single atom catalysts for thermochemical CO2 reduction

Journal of Energy Chemistry, Год журнала: 2023, Номер 86, С. 246 - 262

Опубликована: Авг. 11, 2023

Язык: Английский

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Surface Engineered Single‐atom Systems for Energy Conversion

Advanced Materials, Год журнала: 2024, Номер 36(16)

Опубликована: Янв. 10, 2024

Abstract Single‐atom catalysts (SACs) are demonstrated to show exceptional reactivity and selectivity in catalytic reactions by effectively utilizing metal species, making them a favorable choice among the different active materials for energy conversion. However, SACs still early stages of conversion, problems like agglomeration low conversion efficiency hampering their practical applications. Substantial research focus on support modifications, which vital SAC stability due intimate relationship between atoms support. In this review, category supports variety surface engineering strategies employed SA systems summarized, including site (heteroatom doping, vacancy introducing, groups grafting, coordination tunning) structure (size/morphology control, cocatalyst deposition, facet engineering, crystallinity control). Also, merits single‐atom systematically introduced. Highlights comprehensive summary discussions utilization surface‐engineered diversified applications photocatalysis, electrocatalysis, thermocatalysis, devices. At end potential obstacles using field discussed. This review aims guide rational design manipulation target‐specific capitalizing characteristic benefits engineering.

Язык: Английский

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Modulating charge separation via in situ hydrothermal assembly of low content Bi2S3 into UiO-66 for efficient photothermocatalytic CO2 reduction

Applied Catalysis B Environment and Energy, Год журнала: 2020, Номер 270, С. 118915 - 118915

Опубликована: Март 20, 2020

Язык: Английский

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Integrated design for electrocatalytic carbon dioxide reduction

Catalysis Science & Technology, Год журнала: 2020, Номер 10(9), С. 2711 - 2720

Опубликована: Янв. 1, 2020

We have summarized three novel strategies for electrocatalytic carbon dioxide reduction, including concurrent CO₂ electroreduction, tandem electroreduction and hybrid electroreduction.

Язык: Английский

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Single‐Atom and Dual‐Atom Electrocatalysts Derived from Metal Organic Frameworks: Current Progress and Perspectives

ChemSusChem, Год журнала: 2020, Номер 14(1), С. 73 - 93

Опубликована: Окт. 22, 2020

Single-atom catalysts (SACs) have attracted increasing research interests owing to their unique electronic structures, quantum size effects and maximum utilization rate of atoms. Metal organic frameworks (MOFs) are good candidates prepare SACs the atomically dispersed metal nodes in MOFs abundant N C species stabilize single In addition, distance adjacent atoms can be turned by adjusting ligands adding volatile centers promote formation isolated Moreover, diverse preparation dual-atom (DACs) improve loading optimize structures catalysts. The applications derived DACs for electrocatalysis, including oxygen reduction reaction, evolution hydrogen carbon dioxide reaction nitrogen systematically summarized this Review. corresponding synthesis strategies, atomic electrocatalytic performances discussed provide a deep understanding MOFs-based electrocatalysts. catalytic mechanisms presented, crucial challenges perspectives proposed further design

Язык: Английский

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Tuning Sn3O4 for CO2 reduction to formate with ultra-high current density

Nano Energy, Год журнала: 2020, Номер 77, С. 105296 - 105296

Опубликована: Авг. 17, 2020

Язык: Английский

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Photoelectrocatalytic carbon dioxide reduction: Fundamental, advances and challenges

Nano Materials Science, Год журнала: 2021, Номер 3(4), С. 344 - 367

Опубликована: Июнь 1, 2021

With the rising global population, increasing energy demand and rapid climate change, great concerns have been raised for environment security in future. Solar-driven CO2 reduction provides a promising way to deal with crisis warming, which has widely concerned. Photoelectrocatalysis technology can effectively utilize solar avoid use high-temperature high-voltage by integrating vantages of both photocatalysis electrocatalysis, exhibits broad application prospect high efficiency excellent selectivity. In this review, basic principles photocatalysis, electrocatalysis photoeletrocatalysis are briefly reviewed, also comparing technical characteristics above technologies. Different photoelectrocatalytic systems described compared. The several key influencing factors performance discussed, including interaction between reaction molecules catalysts, conditions influence photoelectrode. Then, advances on mechanisms strategies enhancement optimizing photoexcitation, charge separation surface were reviewed. Besides, challenges prospects will be discussed.

Язык: Английский

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Selective methane electrosynthesis enabled by a hydrophobic carbon coated copper core–shell architecture

Energy & Environmental Science, Год журнала: 2021, Номер 15(1), С. 234 - 243

Опубликована: Дек. 1, 2021

A hydrophobic core–shell architecture was constructed to control local H 2 O availability on the surface of copper-based materials, which could provide a maximum generation rate −434 mA cm −2 towards CH 4 .

Язык: Английский

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