Tuning the local electronic structure of oxygen vacancies over copper-doped zinc oxide for efficient CO2 electroreduction

Wang, Ke; Liu, Dongyu; Liu, Limin; Liu, Jia; Hu, Xiaofei; Li, Ping; Li, Mingtao; Vasenko, A. S.; Xiao, Chunhui

doi:10.1016/j.esci.2022.08.002

Cited by 63 publications

(39 citation statements)

References 59 publications

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“…Electron paramagnetic resonance (EPR) tests were also employed to verify the improvement of the crystallinity in the C 3 N 4 NT-Air sample ( Figure 3 C). Apparently, C 3 N 4 NT-Air exhibits much weaker EPR signal, indicating the reduction of defect degree in C 3 N 4 NT-Air [ 37 , 38 , 39 ]. XPS survey was conducted to further investigate the elemental composition and surface electronic states of the C 3 N 4 nanotube materials.…”

Section: Resultsmentioning

confidence: 99%

A Unique, Porous C3N4 Nanotube for Electrochemiluminescence with High Emission Intensity and Long-Term Stability: The Role of Calcination Atmosphere

Zhao

Zou²,

Liang³

et al. 2022

Molecules

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Developing excellent strategies to optimize the electrochemiluminescence (ECL) performance of C3N4 materials remains a challenge due to the electrode passivation, causing weak and unstable light emission. A strategy of controlling the calcination atmosphere was proposed to improve the ECL performance of C3N4 nanotubes. Interestingly, we found that calcination atmosphere played a key role in specific surface area, pore-size and crystallinity of C3N4 nanotubes. The C3N4 nanotubes prepared in the Air atmosphere (C3N4 NT-Air) possess a larger specific surface area, smaller pore-size and better crystallinity, which is crucial to improve ECL properties. Therefore, more C3N4•− excitons could be produced on C3N4 NT-Air, reacting with the SO4•− during the electrochemical reaction, which can greatly increase the ECL signal. Furthermore, when C3N4 nanotube/K2S2O8 system is proposed as a sensing platform, it offers a high sensitivity, and good selectivity for the detection of Cu2+, with a wide linear range of 0.25 nM ~ 1000 nM and a low detection limit of 0.08 nM.

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Section: Resultsmentioning

confidence: 99%

A Unique, Porous C3N4 Nanotube for Electrochemiluminescence with High Emission Intensity and Long-Term Stability: The Role of Calcination Atmosphere

Zhao

Zou²,

Liang³

et al. 2022

Molecules

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“…Cu doped on ZnO has also been shown to modulate electronic structure of Cu-ZnO by stabilizing the neighboring oxygen vacancies which serves as an electron trap to capture CO 2 and subsequently reduce the energy barrier for the transfer of electron for CO 2 activation . The resulting FE using ZnO-Cu as working electrode was >80% for CO at current density of 45 mA cm –2 …”

Section: Transition Metals In Carbon Dioxide Reduction Reactionmentioning

confidence: 99%

“…263 The resulting FE using ZnO-Cu as working electrode was >80% for CO at current density of 45 mA cm −2 . 264 By doping Ti 3 C 2 T x with Cu (Cu/Ti 3 C 2 T x ) for the electrocatalytic reduction of CO 2 RR, Kamel et al observed an increase in the current density of about −1.08 mA cm −2 , about 3.6 times larger than that of pristine Ti 3 C 2 T x (−0.3 mA/cm −2 ). 265 The synergy between the Ti 3 C 2 T x MXene (high conductivity coupled with the higher carrier mobility, electron density controllable Fermi level and active and large adsorption sites) and Cu atomic dopant (*CO protonation, high atomic dispersion, high electronic effect, and high stability against aggregation) greatly influence the performance of Cu/Ti 3 C 2 T x catalyst owing to Ti 3 C 2 T x being a promoter and accelerate the electron transfer and reaction kinetics.…”

Section: Single Atom Catalyst (Sacs)mentioning

confidence: 99%

Review and Perspective on Transition Metal Electrocatalysts Toward Carbon-Neutral Energy

et al. 2023

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Decarbonizing the chemical industry and achieving carbon-neutral energy is paramount to the sustainability of the human species on earth. Electrocatalysis using transition metalbased catalysts plays a major role in achieving this task. In this work, we present an overview on the application of transition metal-based catalysts in electrocatalytic reactions. We particularly focus on the advancement of the hydrogen evolution reaction (HER), oxygen evolution reaction (OER), oxygen reduction reaction (ORR), nitrogen reduction reaction (NRR), and carbon dioxide reduction reaction (CO 2 RR) using transition metal electrocatalysts. We also aim to highlight the major achievements in these fields and the limitations in their large-scale industrial applications. Different transition metal catalysts are discussed, from 3-dimensional to 1-to 0-dimensional structures. We place special attention to the emerging transition metal catalysts such as 2dimensional carbide and nitride MXenes and single atom catalysts. Lastly, we offer recommendation for future research directions for the aforementioned electrocatalysis fields using transition metal electrocatalysts. This work will ultimately help both existing and incoming researchers in these fields in providing the state-of-the-art research findings and identifying the major challenges that must be addressed in order to attain carbon-neutral energy.

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“…A variety of products can be produced via the CO 2 reduction reaction (CO 2 RR), including CO, , formate, , and multicarbon products (such as ethylene and ethanol). , Among them, CO, which only involves the two-electron transfer, is the simplest carbonaceous product and can be used as the reactant in the Fischer–Tropsch process to generate synthetic fuels such as diesel. − In addition, compared to direct CO 2 reduction to multicarbon products, CO can be further electrosynthesized for multicarbon products to reduce carbonate formation and increase CO 2 utilization. − Furthermore, compared with traditional methods of CO production, such as steam reforming of natural gas, partial oxidation of oil, and gasification of coal, the electrochemical CO 2 reduction serves as an attractive and sustainable CO production approach via effectively utilizing CO 2 with the advantages of occurring under mild reaction conditions and avoiding the use of fossil fuels. Therefore, the electroreduction of CO 2 to CO has attracted significant attention. − …”

Section: Introductionmentioning

confidence: 99%

Layer-Stacked Zn with Abundant Corners for Selective CO₂ Electroreduction to CO

Zhou

Wen

Gan

et al. 2023

ACS Appl. Energy Mater.

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Electric-driven CO2 reduction offers a promising strategy for CO2 conversion into valuable chemicals and fuels. However, developing low cost and efficient catalysts is still a challenge. Although earth-abundant Zn with the capability of converting CO2 to CO is considered to be one of the promising materials, the low selectivity and stability of Zn catalyst limit its practical applications in CO2 reduction. Herein, we report a highly selective and stable layer-stacked Zn catalyst prepared by an efficient and facile electrochemical method for CO2 reduction to CO. The layer-stacked Zn can produce CO with more than 90% Faradaic efficiency at an overpotential of 0.9 V. Notably, the layer-stacked Zn maintained ∼90% CO selectivity in CO2 electrolysis for more than 70 h, which significantly surpasses the durability of the reported Zn-based catalysts to date. In addition, after prolonged CO2 reduction, the robust catalytic performance of layer-stacked Zn can be recovered repeatedly by the simple electrochemical method, which may be linked to the maintained layer-stacked structure even after multiple reactivations. Further analysis suggests that while abundant low-coordinated sites (corners and edges) can be created on layer-stacked Zn, the enhanced catalytic performance in CO2 reduction is mainly correlated with the created corners instead of edges, owing to that corners not only improve the intrinsic CO2 reduction activity but also inhibit H2 evolution simultaneously.

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Tuning the local electronic structure of oxygen vacancies over copper-doped zinc oxide for efficient CO2 electroreduction

Cited by 63 publications

References 59 publications

A Unique, Porous C3N4 Nanotube for Electrochemiluminescence with High Emission Intensity and Long-Term Stability: The Role of Calcination Atmosphere

A Unique, Porous C3N4 Nanotube for Electrochemiluminescence with High Emission Intensity and Long-Term Stability: The Role of Calcination Atmosphere

Review and Perspective on Transition Metal Electrocatalysts Toward Carbon-Neutral Energy

Layer-Stacked Zn with Abundant Corners for Selective CO₂ Electroreduction to CO

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Tuning the local electronic structure of oxygen vacancies over copper-doped zinc oxide for efficient CO2 electroreduction

Cited by 63 publications

References 59 publications

A Unique, Porous C3N4 Nanotube for Electrochemiluminescence with High Emission Intensity and Long-Term Stability: The Role of Calcination Atmosphere

A Unique, Porous C3N4 Nanotube for Electrochemiluminescence with High Emission Intensity and Long-Term Stability: The Role of Calcination Atmosphere

Review and Perspective on Transition Metal Electrocatalysts Toward Carbon-Neutral Energy

Layer-Stacked Zn with Abundant Corners for Selective CO2 Electroreduction to CO

Contact Info

Product

Resources

About

Layer-Stacked Zn with Abundant Corners for Selective CO₂ Electroreduction to CO