Tuning the Microenvironment in Monolayer MgAl Layered Double Hydroxide for CO<sub>2</sub>‐to‐Ethylene Electrocatalysis in Neutral Media

Xu, Yi; Li, Wenjing; Fu, Huai Qin; Zhang, Xin Yu; Zhao, Jia; Wu, Xuefeng; Yuan, Hai Yang; Zhu, Minghui; Dai, Sheng; Liu, Peng Fei; Yang, Hua Gui

doi:10.1002/ange.202217296

Cited by 6 publications

(1 citation statement)

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“…In the XRD pattern (Figure 9e), the characteristic diffraction peaks of 3Ni−Al 2 O 3 /CN and Ni/CN did not change after cycling. Of interest is the appearance of diffraction peaks around 18°for 3Ni−Al 2 O 3 /CN after cycling, which is hypothesized to be possibly due to the gradual accumulation of PTFE on the magnetic stirrer on the catalyst surface during repeated stirring, 70…”

Section: Al Introduction Modulates Fal Adsorption and Activationmentioning

confidence: 99%

Ni–Al₂O₃/CN Nanocatalysts for Selective Hydrogenation of Furfural

Yang,

Dao,

et al. 2024

ACS Appl. Nano Mater.

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Cheap Ni catalysts are highly active for the catalytic conversion of biomass, but it is challenging to prepare Ni-based catalysts with high selectivity and stability under mild conditions. Adjusting the adsorption strength of Ni catalysts to reaction substrates and intermediates by metal introduction is an effective strategy to achieve high yields of products. In this paper, a series of xNi-Al 2 O 3 /CN catalysts were prepared by introducing Al content as a variable and were used for hydrogenation of furfural (FAL) to tetrahydrofurfuryl alcohol (THFOL). Under the mild condition of 90 °C, the yield of the 3Ni−Al 2 O 3 /CN catalyst with the optimal Ni/Al ratio of 3:1 reached 99.9%, which was 8.3 times that of Ni/ CN without Al. The improvement in the catalytic performance was mainly attributed to the enhanced interaction of Ni and Al 2 O 3 by Al introduction, which increased the content of active Ni 0 and Lewis acid. This not only promoted the adsorption and activation of H 2 and FAL but also increased the adsorption strength of 3Ni−Al 2 O 3 /CN on the intermediate FOL to improve THFOL selectivity. The correlation between the modulation of Al content and catalytic performance was explored in detail through relevant characterization and theoretical calculations. In addition, Al-introduced 3Ni−Al 2 O 3 /CN maintained high stability over 10 cycles relative to the rapid deactivation of Ni/CN, which was attributed to the strong interaction of Ni−Al 2 O 3 . This strategy to modulate the activation ability of the catalyst provides a reference for the logical design of efficient bifunctional metal catalysts.

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Section: Al Introduction Modulates Fal Adsorption and Activationmentioning

confidence: 99%

Ni–Al₂O₃/CN Nanocatalysts for Selective Hydrogenation of Furfural

Yang,

Dao,

et al. 2024

ACS Appl. Nano Mater.

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Importance of Morphology of Layered Double Hydroxide in Electrochemical Energy Storage and Catalysis

Peng,

Pan,

Qiao

et al. 2024

Small Methods

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The development of nanomaterials for energy storage and conversion has always been important. Layered double hydroxide (LDH) is a promising material due to its high capacity, tunable composition and easy synthesis. In this work, the morphology of NiCo‐LDH is tuned with surfactants including sodium dodecyl sulfate (SDS) and cetyltrimethylammonium bromide (CTAB), and investigated the correlation between morphology and electrochemical properties. NiCo‐LDH‐SDS with a layered structure exhibited a specific capacitance of 1004 C g−1 at 1 A g−1, which is higher than that of the needle‐like NiCo‐LDH‐CTAB (678 C g−1) and the rod‐like NiCo‐LDH (279 C g−1). Meanwhile, NiCo‐LDH‐SDS and NiCo‐LDH‐CTAB showed a reduction of 36 and 19 mV, respectively, in their overpotentials at 10 mA cm−2 compared to NiCo‐LDH. Contact angle and adhesive force measurements proved the influence of morphology on the interfacial properties that layered structure is favorable for the timely detachment of the bubbles. Therefore, rational morphology regulation of LDH can effectively alter the gas–liquid–solid interface and thereby accelerate the reaction kinetics. The connections between morphologies, bubbles releasing and electrochemical performance are well established in this work, which can be applied in the investigation of nanomaterials for energy‐related activities, especially the ones concerning bubbles releasing processes.

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Electrochemical Carbon Dioxide Reduction to Ethylene: From Mechanistic Understanding to Catalyst Surface Engineering

Cao

et al. 2023

Nano-Micro Lett.

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Electrochemical carbon dioxide reduction reaction (CO2RR) provides a promising way to convert CO2 to chemicals. The multicarbon (C2+) products, especially ethylene, are of great interest due to their versatile industrial applications. However, selectively reducing CO2 to ethylene is still challenging as the additional energy required for the C–C coupling step results in large overpotential and many competing products. Nonetheless, mechanistic understanding of the key steps and preferred reaction pathways/conditions, as well as rational design of novel catalysts for ethylene production have been regarded as promising approaches to achieving the highly efficient and selective CO2RR. In this review, we first illustrate the key steps for CO2RR to ethylene (e.g., CO2 adsorption/activation, formation of *CO intermediate, C–C coupling step), offering mechanistic understanding of CO2RR conversion to ethylene. Then the alternative reaction pathways and conditions for the formation of ethylene and competitive products (C1 and other C2+ products) are investigated, guiding the further design and development of preferred conditions for ethylene generation. Engineering strategies of Cu-based catalysts for CO2RR-ethylene are further summarized, and the correlations of reaction mechanism/pathways, engineering strategies and selectivity are elaborated. Finally, major challenges and perspectives in the research area of CO2RR are proposed for future development and practical applications.

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Tuning the Microenvironment in Monolayer MgAl Layered Double Hydroxide for CO₂‐to‐Ethylene Electrocatalysis in Neutral Media

Cited by 6 publications

References 50 publications

Ni–Al₂O₃/CN Nanocatalysts for Selective Hydrogenation of Furfural

Ni–Al₂O₃/CN Nanocatalysts for Selective Hydrogenation of Furfural

Importance of Morphology of Layered Double Hydroxide in Electrochemical Energy Storage and Catalysis

Electrochemical Carbon Dioxide Reduction to Ethylene: From Mechanistic Understanding to Catalyst Surface Engineering

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Tuning the Microenvironment in Monolayer MgAl Layered Double Hydroxide for CO2‐to‐Ethylene Electrocatalysis in Neutral Media

Cited by 6 publications

References 50 publications

Ni–Al2O3/CN Nanocatalysts for Selective Hydrogenation of Furfural

Ni–Al2O3/CN Nanocatalysts for Selective Hydrogenation of Furfural

Importance of Morphology of Layered Double Hydroxide in Electrochemical Energy Storage and Catalysis

Electrochemical Carbon Dioxide Reduction to Ethylene: From Mechanistic Understanding to Catalyst Surface Engineering

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Tuning the Microenvironment in Monolayer MgAl Layered Double Hydroxide for CO₂‐to‐Ethylene Electrocatalysis in Neutral Media

Ni–Al₂O₃/CN Nanocatalysts for Selective Hydrogenation of Furfural

Ni–Al₂O₃/CN Nanocatalysts for Selective Hydrogenation of Furfural