On the catalytic and degradative role of oxygen-containing groups on carbon electrode in non-aqueous ORR

Inozemtseva, Alina I.; Kataev, Elmar Yu.; Frolov, Alexander S.; Amati, Matteo; Gregoratti, Luca; Beranová, Klára; Dieste, Virginia Pérez; Escudero, Carlos; Fedorov, Alexander; Тарасов, А. В.; Usachov, Dmitry Yu.; Vyalikh, D. V.; Shao‐Horn, Yang; Itkis, Daniil M.; Yashina, Lada V.

doi:10.1016/j.carbon.2020.12.008

Cited by 14 publications

(6 citation statements)

References 72 publications

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“…Additionally, oxygen groups on the carbon species may also allow −H* to spillover from the metal particles onto the carbon species. C 1s XPS spectra at 288.4 eV confirmed that lactone groups (O−C=O) appeared on the surface of the three carbon‐shell catalysts (Figure S9) [13d] . The −H* spillover effect of the carbon‐supported catalysts was favored due to the presence of lactone groups on the carbon carriers as supported by theoretical calculations [13e] .…”

Section: Resultsmentioning

confidence: 59%

Tailoring the CO₂ Hydrogenation Performance of Fe‐Based Catalyst via Unique Confinement Effect of the Carbon Shell

He,

Wang,

et al. 2023

Chemistry A European J

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Even though Fe‐based catalysts have been widely employed for CO2 hydrogenation into hydrocarbons, oxygenates, liquid fuels, etc., the precise regulation of their physicochemical properties is needed to enhance the catalytic performance. Herein, under the guidance of the traditional concept in heterogeneous catalysis‐confinement effect, a core‐shell structured catalyst Na−Fe3O4@C is constructed to boost the CO2 hydrogenation performance. Benefiting from the carbon‐chain growth limitation, tailorable H2/CO2 ratio on the catalytic interface, and unique electronic property that all endowed by the confinement effect, the selectivity and space‐time yield of light olefins (C2=−C4=) are as high as 47.4 % and 15.9 g molFe−1 h−1, respectively, which are all notably higher than that from the shell‐less counterpart. The function mechanism of the confinement effect in Fe‐based catalysts are clarified in detail by multiple characterization and density functional theory (DFT). This work may offer a new prospect for the rational design of CO2 hydrogenation catalyst.

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Section: Resultsmentioning

confidence: 59%

Tailoring the CO₂ Hydrogenation Performance of Fe‐Based Catalyst via Unique Confinement Effect of the Carbon Shell

He,

Wang,

et al. 2023

Chemistry A European J

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“…Compared to the distinct peaks of Li 2 CO 3 after Figure 8 shows the XPS results in the C 1s region. After the fourth discharge, peaks attributed to Li 2 CO 3 appeared around 290 eV; 52,53 however, the peaks became smaller after the fourth charge, and the spectra got back to those before the tests to some extent. Thus, the peak attributed to C−C/C�C at 284.8 eV became the main one.…”

Section: Changes Of Electrodes During Discharge/chargementioning

confidence: 94%

Performance of Air Electrode Catalysts in the Presence of Redox Mediators for High-Capacity Li–O₂ Batteries

et al. 2023

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Lithium–oxygen batteries (LOBs) have usually been investigated at low current densities and low areal capacities due to small amounts of active materials supported on carbon papers, though they theoretically have high energy density. In addition, studies on catalysts have usually been conducted in the absence of redox mediators. In this study, we have investigated various catalysts at a high current density (0.4 mA cm–2), at a high areal capacity (4 mAh cm–2), and in the presence of dual redox mediators (RMs) of NO3 – and Br–, using Ketjen black free-standing sheets (KBFSs; thickness: 270 μm) of high areal weight (6 mg cm–2). The RMs reduced the charge overvoltage even in the presence of catalysts, and catalysts also promoted Li2O2 decomposition in the presence of RMs. RuO2/KBFS, Ir-Co/N-KBFS, and Co/KBFS improved both cyclability and overvoltages compared with KBFS. RuO2/KBFS and Ir-Co/N-KBFS decomposed Li2CO3 at lower voltages than KBFS and exhibited less Li2CO3 residue after charge than KBFS. However, catalysts were coated with byproducts even in the presence of RMs during the discharge/charge tests.

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“…Recently, Yashina et al. [ 62 ] investigated the reaction between O 2 − /LiO 2 and carbon electrodes with well‐defined surface functional groups. Two model carbon materials, i.e., single‐layer graphene grown on Cu (Gr/Cu) and highly oriented pyrolytic graphite (HOPG), were used, and the carbon surface chemistry was modulated by the oxidation of atomic oxygen.…”

Section: Parasitic Chemistrymentioning

confidence: 99%

“…Since Wandt et al [64] in 2016 first reported on the 1 O 2 evolution in the charging reaction of Li-O 2 batteries and demonstrated its contribution to the parasitic chemistry, the 1 O 2 has received substantial interest in the Li-O 2 community. In 2017, Mahne et al [65] provided another experimental evidence that 1 O 2 evolution can occur during both discharge and charge processes of [62] Copyright 2021, Elsevier. Color code: H (white), N (blue), Li (pink), and O (red).…”

Section: Omentioning

confidence: 99%

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Lithium‐Oxygen Chemistry at Well‐Designed Model Interface Probed by In Situ Spectroscopy Coupled with Theoretical Calculations

Zhao

Guo

Peng

2023

Adv Funct Materials

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The aprotic lithium‐oxygen (Li‐O2) battery has an extremely high theoretical specific energy and potentially provides a tantalizing solution to the renewable energy storage challenge encountered by contemporary and future societies. Nevertheless, the realization of practical Li‐O2 batteries currently meets with substantial challenges that include, but are not limited to, low energy capability and short longevity. To address these obstacles, unveiling the reaction processes and degradation mechanisms of Li‐O2 batteries is crucially important. Over recent years, the research paradigm of in situ spectroscopy coupled with theoretical calculations performed on well‐designed model interfaces, has proved to be indispensable for the fundamental study and performance optimization of various energy storage devices. In this contribution, first representative illustrations of this research paradigm are offered in the study of both primary and parasitic reactions of Li‐O2 batteries, which significantly simplifies, but not degrade, the complex reaction conditions and decouples multiple processes occurring simultaneously in Li‐O2 cells. Then, the perspective is provided on the remaining issues as well as uncertainties and discuss future research directions. Finally, wider research community is encouraged to tailor‐design versatile model interfaces to better bridge in situ spectroscopy and theoretical calculations for the research and development of better Li‐O2 batteries and beyond.

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On the catalytic and degradative role of oxygen-containing groups on carbon electrode in non-aqueous ORR

Cited by 14 publications

References 72 publications

Tailoring the CO₂ Hydrogenation Performance of Fe‐Based Catalyst via Unique Confinement Effect of the Carbon Shell

Tailoring the CO₂ Hydrogenation Performance of Fe‐Based Catalyst via Unique Confinement Effect of the Carbon Shell

Performance of Air Electrode Catalysts in the Presence of Redox Mediators for High-Capacity Li–O₂ Batteries

Lithium‐Oxygen Chemistry at Well‐Designed Model Interface Probed by In Situ Spectroscopy Coupled with Theoretical Calculations

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On the catalytic and degradative role of oxygen-containing groups on carbon electrode in non-aqueous ORR

Cited by 14 publications

References 72 publications

Tailoring the CO2 Hydrogenation Performance of Fe‐Based Catalyst via Unique Confinement Effect of the Carbon Shell

Tailoring the CO2 Hydrogenation Performance of Fe‐Based Catalyst via Unique Confinement Effect of the Carbon Shell

Performance of Air Electrode Catalysts in the Presence of Redox Mediators for High-Capacity Li–O2 Batteries

Lithium‐Oxygen Chemistry at Well‐Designed Model Interface Probed by In Situ Spectroscopy Coupled with Theoretical Calculations

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Product

Resources

About

Tailoring the CO₂ Hydrogenation Performance of Fe‐Based Catalyst via Unique Confinement Effect of the Carbon Shell

Tailoring the CO₂ Hydrogenation Performance of Fe‐Based Catalyst via Unique Confinement Effect of the Carbon Shell

Performance of Air Electrode Catalysts in the Presence of Redox Mediators for High-Capacity Li–O₂ Batteries