Electrochemical reconstruction of ZnO for selective reduction of CO2 to CO

Luo, Wen; Zhang, Qin; Zhang, Jie; Moioli, Emanuele; Zhao, Kun; Züttel, Andreas

doi:10.1016/j.apcatb.2020.119060

Cited by 120 publications

(90 citation statements)

References 60 publications

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“…In situ Raman spectra also confirm the well-maintained surface properties during the reactions (Figure 3 e) with slight self-reduction under too negative cathodic potentials (À1.1 V). [14] Electrocatalytic results of samples with different Mo/Cu ratios further demonstrate the necessity of a suitable Mo ratio for enhancing CO 2 RR performance as well as the negative effect of Cu on CO 2 RR ( Figure 3 f; Supporting Information, Figure S18). Consequently, all the electrocatalytic results suggest an inverse trend of Cu-ZnO and Mo-ZnO for promoting CO 2 RR electrolysis, and Mo-ZnO exhibited unique advantages for CO 2 reduction (Supporting Information, Table S2).…”

Section: Bc; Supporting Information Figures S12-s15)mentioning

confidence: 87%

Inversely Tuning the CO₂Electroreduction and Hydrogen Evolution Activity on Metal Oxide via Heteroatom Doping

Wang

Zhang

et al. 2021

Angew Chem Int Ed

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Tuning the electronic states near the Fermi level can effectively facilitate the reaction kinetics. However, elucidating the role of a specific electronic state of metal oxide in simultaneously regulating the CO 2 electroreduction reaction (CO 2 RR) and competing hydrogen evolution reaction (HER) is still rare, making it difficult to accurately predict the practical CO 2 RR performance. Herein, replacing the Zn site by heteroatoms with different outer electrons (Mo and Cu) is found to tune both occupied and unoccupied orbitals near the Fermi level of ZnO. Moreover, the different electronic states significantly modulate both CO 2 RR and HER activity with a totally inverse trend, thus dramatically tuning the practical CO 2 RR performance. In parallel, the correlation between electronic states, reaction free energies and practical activity is demonstrated. This work provides a possibility for engineering efficient CO 2 RR eletrocatalysts through tunable composition and electronic structures.

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Section: Bc; Supporting Information Figures S12-s15)mentioning

confidence: 87%

Inversely Tuning the CO₂Electroreduction and Hydrogen Evolution Activity on Metal Oxide via Heteroatom Doping

Wang

Zhang

et al. 2021

Angew Chem Int Ed

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“…Figure 4 shows the FESEM and TEM images of the Zn‐1.7/16 hours catalyst after thermal treatment at 400°C in air or H 2 atmosphere. Unlike the pre‐electrochemical reduction of the ZnO or Zn(OH) 2 catalyst before the CO 2 RR, 11,29 the thermal treatment in the vapour phase is a feasible route for changing the properties of the catalyst without modifying the morphology dramatically 39,56 …”

Section: Resultsmentioning

confidence: 99%

“…For instance, Woo's group revealed for the first time that the Zn(101) facet is favourable for CO formation during the electrochemical CO 2 RR, and according to density functional theory calculations, it is more effective than the Zn(002) facet in stabilising the *COOH intermediate 21 . On the other hand, Zn‐based catalysts obtained by the pre‐electroreduction of ZnO, which results in a morphological change to a hexagonal structure and an increase in the number of active sites, have been investigated 11,29 . Moreover, Zuttel et al prepared hexagonal Zn catalysts with a large electrochemical surface area by the electro‐reconstruction of ZnO.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, Zuttel et al prepared hexagonal Zn catalysts with a large electrochemical surface area by the electro‐reconstruction of ZnO. Furthermore, during the electro‐reconstruction of ZnO, a thin oxide‐derived surface was formed; this facilitated the reaction kinetics of the rate‐determining step (RDS) in the CO 2 RR, thereby improving the catalytic performance 29‐32 …”

Section: Introductionmentioning

confidence: 99%

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Solution‐phase‐reconstructed Zn‐based nanowire electrocatalysts for electrochemical reduction of carbon dioxide to carbon monoxide

Kim

Han

et al. 2020

Int J Energy Res

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Summary The production of CO via electrochemical CO2 reduction has been recognised as a promising technology that overcomes the environmental issues caused by global warming. It also facilitates the conversion of CO2 into energy sources. Earth‐abundant Zn is a well‐known alternative to noble metal catalysts such as Au and Ag for the electrochemical CO2 reduction to CO. In particular, Zn‐based materials in the form of nanowires are potentially applicable as electrocatalysts in the electrochemical CO2 reduction. However, the conventional methods for manufacturing the nanowire structure are difficult as they require harsh conditions such as high temperatures and excess energy. In this study, Zn‐based nanowire catalysts are prepared by the facile electrodeposition of Zn nanostructures on a substrate followed by their energy‐free solution‐phase reconstitution. Further, their electrochemical performance in the CO2 reduction is investigated in a CO2‐purged 0.5 M KHCO3 electrolyte. By optimising the deposition conditions, hexagonal Zn (h‐Zn) plates with dominant Zn(101) facets, the favoured crystal structure for CO2 reduction, are fabricated on carbon paper. Furthermore, it is found that, during the solution‐phase reconstruction over 16 hours, the h‐Zn plate transforms to a nanowire owing to the differences between the oxidation rates of different crystal facets and the formation of a hydroxide complex. The activity of the reconstructed Zn‐based nanowire catalyst is enhanced further by forming an oxide layer via thermal treatment in a H2 atmosphere. This treatment boosted the reaction kinetics, thereby enhancing the catalyst performance in the CO2 reduction.

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“…According to previous literatures, many kinds of electrocatalysts are active for CO 2 RR, including metal catalysts, non‐metal catalysts, and molecular catalysts as shown in Figure 4 [12,17,19,29–33] . The type of catalysts have significant influence on the activities and product distribution.…”

Section: Catalytic Sites and Electrochemical Performance For The Formmentioning

confidence: 99%

Electrochemical Reduction of Carbon Dioxide to Ethanol: An Approach to Transforming Greenhouse Gas to Fuel Source

Zhang

Liu

2021

Chemistry An Asian Journal

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Converting carbon dioxide (CO2) into high‐value fuels or chemicals is considered as a promising way to utilize CO2 and alleviate the excessive greenhouse gas emission. Among multiple catalysis approaches, electrochemical reduction of CO2 to ethanol has an important prospect due to the high energy density and widely applications of ethanol. In recent years, many electrocatalysts for CO2 reduce reaction (CO2RR) have shown promising catalytic activity for ethanol production. In this review, we will introduce the recent progress in this field. The basic principles and electrochemical performances of CO2RR are reviewed at first. Then, several categories of active electrocatalysts for CO2RR to ethanol are summarized, including the discussion of reaction mechanism and catalytic sites. Finally, several possible strategies are proposed, providing guidance for future design and preparation of high‐performance catalysts.

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Electrochemical reconstruction of ZnO for selective reduction of CO2 to CO

Cited by 120 publications

References 60 publications

Inversely Tuning the CO₂Electroreduction and Hydrogen Evolution Activity on Metal Oxide via Heteroatom Doping

Inversely Tuning the CO₂Electroreduction and Hydrogen Evolution Activity on Metal Oxide via Heteroatom Doping

Solution‐phase‐reconstructed Zn‐based nanowire electrocatalysts for electrochemical reduction of carbon dioxide to carbon monoxide

Electrochemical Reduction of Carbon Dioxide to Ethanol: An Approach to Transforming Greenhouse Gas to Fuel Source

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Electrochemical reconstruction of ZnO for selective reduction of CO2 to CO

Cited by 120 publications

References 60 publications

Inversely Tuning the CO2Electroreduction and Hydrogen Evolution Activity on Metal Oxide via Heteroatom Doping

Inversely Tuning the CO2Electroreduction and Hydrogen Evolution Activity on Metal Oxide via Heteroatom Doping

Solution‐phase‐reconstructed Zn‐based nanowire electrocatalysts for electrochemical reduction of carbon dioxide to carbon monoxide

Electrochemical Reduction of Carbon Dioxide to Ethanol: An Approach to Transforming Greenhouse Gas to Fuel Source

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Product

Resources

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Inversely Tuning the CO₂Electroreduction and Hydrogen Evolution Activity on Metal Oxide via Heteroatom Doping

Inversely Tuning the CO₂Electroreduction and Hydrogen Evolution Activity on Metal Oxide via Heteroatom Doping