Sn Dopants with Synergistic Oxygen Vacancies Boost CO₂ Electroreduction on CuO Nanosheets to CO at Low Overpotential

ACS Nano, Journal Year: 2022, Volume and Issue: 16(11), P. 19210 - 19219

Published: Oct. 18, 2022

Using the electrochemical CO2 reduction reaction (CO2RR) with Cu-based electrocatalysts to achieve carbon-neutral cycles remains a significant challenge because of its low selectivity and poor stability. Modulating surface electron distribution by defects engineering or doping can effectively improve CO2RR performance. Herein, we synthesize electrocatalyst Vo-CuO(Sn) nanosheets containing oxygen vacancies Sn dopants for application in CO2RR-to-CO. Density functional theory calculations confirm that incorporation atoms substantially reduces energy barrier *COOH *CO intermediate formation, which results high efficiency, overpotential, superior stability CO conversion. This possesses Faraday efficiency (FE) 99.9% at overpotential 420 mV partial current density up 35.22 mA cm-2 -1.03 V versus reversible hydrogen electrode (RHE). The FECO could retain over 95% within wide potential area from -0.48 -0.93 RHE. Moreover, obtain long-term more than 180 h only slight decay activity. Therefore, this work provides an effective route designing environmentally friendly

Language: Английский

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Enhanced photocatalytic CO2 reduction by integrating an iron based metal-organic framework and a photosensitizer

Separation and Purification Technology, Journal Year: 2023, Volume and Issue: 332, P. 125873 - 125873

Published: Nov. 26, 2023

Language: Английский

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Nanoscale Engineering of P‐Block Metal‐Based Catalysts Toward Industrial‐Scale Electrochemical Reduction of CO₂

Advanced Energy Materials, Journal Year: 2023, Volume and Issue: 13(34)

Published: July 27, 2023

Abstract The efficient conversion of CO 2 to value‐added products represents one the most attractive solutions mitigate climate change and tackle associated environmental issues. In particular, electrochemical reduction fuels chemicals has garnered tremendous interest over last decades. Among all from reduction, formic acid is considered economically vital products. P‐block metals (especially Bi, Sn, In, Pb) have been extensively investigated recognized as catalytic materials for electroreduction formate. Despite remarkable progress, future implementation this technology at industrial‐scale hinges on ability solve remaining roadblocks. review, current research status, challenges, prospects p‐block metal‐based catalysts primarily formate are comprehensively reviewed. rational design nanostructure engineering these metal optimization their performances discussed in detail. Subsequently, recent progress development state‐of‐the‐art operando characterization techniques together with advanced cells uncover intrinsic catalysis mechanism discussed. Lastly, a perspective directions including tackling critical challenges realize its early industrial presented.

Language: Английский

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Selective electroreduction of CO₂ to C₂₊ products on cobalt decorated copper catalysts

Chemical Synthesis, Journal Year: 2024, Volume and Issue: 4(3)

Published: Aug. 6, 2024

Cu-catalyzed electrochemical CO2 reduction reaction (CO2RR) to multi-carbon (C2+) products is often plagued by low selectivity because the adsorption energies of different intermediates are in a linear scaling relationship. Development Cu-based bimetallic catalysts has been considered as an attractive strategy address this issue; however, conventional avoid metals with strong CO prevent surface poisoning. Herein, we demonstrated that limiting amount Co CuCo can enhance C2+ product selectivity. Specifically, synthesized series CuCox trace amounts (0.07-1.8 at%) decorated on Cu nanowires using simple dip coating method. Our results revealed volcano-shaped correlation between loading and selectivity, CuCo0.4% catalyst exhibiting 2-fold increase compared nanowire sample. In situ Raman Infrared spectroscopies suggested optimal could stabilize oxide/hydroxide species under CO2RR condition promote CO, thus enhancing This work expands potential for developing CO2RR.

Language: Английский

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Opening Direct Electrochemical Fischer–Tropsch Synthesis Path by Interfacial Engineering of Cu Electrode with P-Block Elements

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(3), P. 3368 - 3387

Published: Jan. 12, 2024

The electrochemical synthesis of syngas (CO and H2) has garnered considerable attention in the context Fischer–Tropsch (FT) employing thermal catalysts. Nonetheless, need for a novel, cost-effective technique persists. In this investigation, we introduce direct (dEC) approach FT that functions under ambient conditions by utilizing p-block element (Sn In) overlaid Cu electrode. Surface *CO H* species were obtained an electrolytic medium through CO2 + H+ e– → HOOCad (or CO adsorption) reactions, respectively. We have observed C2–7 long-chain hydrocarbons with CnH2n+2/CnH2n ratio 1–3, observation can be explained process C–C coupling chain growth conventional synthesis, based on linearity Anderson-Schulz–Flory equation plots. Thick Sn overlayers resulted dominant production formate, while C2H4 found to proportional inversely correlated H2, C2H6, C3–7 hydrocarbon production. EC CO2/CO reduction used dEC offers valuable insights into mechanism C2+ holds promise as eco-friendly producing energy environmental purposes.

Language: Английский

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