Effects of N and O groups for oxygen reduction reaction on one- and two-dimensional carbonaceous materials

Cardoso, Eduardo S. F.; Fortunato, Guilherme V.; Palm, Iris; Kisand, Vambola; Greco, Anderson S; Júnior, Jorge Luiz Raposo; Kikas, Arvo; Merisalu, Maido; Sammelselg, Väinö; Maia, Gilberto

doi:10.1016/j.electacta.2020.136052

Cited by 29 publications

(31 citation statements)

References 50 publications

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“…[81] Second, the variations in material preparation methods and catalysts morphologies may also lead to different catalytic mechanism, which results in the identification of different active moieties as catalytic sites. [83] Further operando studies were requested to investigate the exact roles of different N species in electrochemical H 2 O 2 production. Moreover, despite the critical role of N dopants, the synergies between N species and other functionalities (such as oxygen species) cannot be neglected as the other heteroatoms also show an advocating role in promoting the H 2 O 2 selectivity, [84,85] which will be further discussed in the latter sections of this review.…”

Section: Heteroatom Doped Carbonmentioning

confidence: 99%

“…Therefore, the specific roles of oxygen functionalities were not only identified in oxygenated carbon, but also CMs with other heteroatom dopants and defect/edge sites. [ 83 ] For instance, to understand the ORR mechanism, McCloskey et al synthesized three distinct N‐doped reduced graphene oxide (NrGO) catalysts and investigated their structural and chemical properties in detail. [ 95 ] Combined XPS, Raman, and infrared spectroscopies with high‐resolution transmission electron microscopy (HR‐TEM) characterizations revealed that all three NrGO samples are similar in terms of the identity of functional groups (oxygen and nitrogen), although the preparation routes are different.…”

Section: Carbon‐based Electrocatalysts For H2o2 Production Via Orrmentioning

confidence: 99%

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Electrosynthesis of Hydrogen Peroxide through Selective Oxygen Reduction: A Carbon Innovation from Active Site Engineering to Device Design

Zhang

Chen

Pan

et al. 2023

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Electrochemical synthesis of hydrogen peroxide (H2O2) through the selective oxygen reduction reaction (ORR) offers a promising alternative to the energy‐intensive anthraquinone method, while its success relies largely on the development of efficient electrocatalyst. Currently, carbon‐based materials (CMs) are the most widely studied electrocatalysts for electrosynthesis of H2O2 via ORR due to their low cost, earth abundance, and tunable catalytic properties. To achieve a high 2e− ORR selectivity, great progress is made in promoting the performance of carbon‐based electrocatalysts and unveiling their underlying catalytic mechanisms. Here, a comprehensive review in the field is presented by summarizing the recent advances in CMs for H2O2 production, focusing on the design, fabrication, and mechanism investigations over the catalytic active moieties, where an enhancement effect of defect engineering or heteroatom doping on H2O2 selectivity is discussed thoroughly. Particularly, the influence of functional groups on CMs for a 2e−‐pathway is highlighted. Further, for commercial perspectives, the significance of reactor design for decentralized H2O2 production is emphasized, bridging the gap between intrinsic catalytic properties and apparent productivity in electrochemical devices. Finally, major challenges and opportunities for the practical electrosynthesis of H2O2 and future research directions are proposed.

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Section: Heteroatom Doped Carbonmentioning

confidence: 99%

Section: Carbon‐based Electrocatalysts For H2o2 Production Via Orrmentioning

confidence: 99%

Electrosynthesis of Hydrogen Peroxide through Selective Oxygen Reduction: A Carbon Innovation from Active Site Engineering to Device Design

Zhang

Chen

Pan

et al. 2023

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“…It has been suggested that various combinations of N species (namely pyridinic, quaternary, and pyrrolic) contribute to a synergistic effect and are responsible for the activity of N‐doped carbon nanomaterials in the ORR [7a,16] . In addition to this, it is reported in [17] that the ORR characteristics of N‐doped carbon nanomaterials are influenced not only by the content of various nitrogen forms, but also by structural features, morphology and defectiveness of the carbon material. Thus, the question of the precise parameters responsible for the activity and selectivity of N‐doped carbon nanomaterials in ORR remains open.…”

Section: Introductionmentioning

confidence: 99%

Nitrogen and Oxygen Functionalization of Multi‐Walled Carbon Nanotubes for Tuning the Bifunctional Oxygen Reduction/Oxygen Evolution Performance of Supported FeCo Oxide Nanoparticles

et al. 2021

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The combination of nanostructured transition metal oxides and carbon materials is a promising approach to obtain inexpensive, highly efficient, and stable bifunctional electrocatalysts for the oxygen reduction (ORR) and the oxygen evolution (OER) reactions. We present a strategy for improving the bifunctional ORR/OER activity of supported FeCoOx nanoparticles by tuning the properties of multi‐walled carbon nanotubes (MWCNT) via nitrogen doping during their synthesis in the presence of ammonia and subsequent oxidative functionalization. In‐depth structural characterization indicates that oxidative treatment provides fine control of the dispersion and localization of FeCoOx nanoparticles in MWCNT, while the optimal degree of nitrogen doping leads to increased bifunctional activity due to enhanced electrical conductivity as well as improved catalyst stability, in both OER and ORR conditions, for nanoparticles formed by two different synthesis routes. The findings reported can be strategically considered for the design of high‐performance reversible ORR/OER electrocatalysts.

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“…Doping with heteroatoms, particularly nitrogen, has been shown to increase the electrocatalytic activity of carbon-based catalysts toward the ORR due to the redistribution of charge density and/or spin on the adjacent atoms of carbon, which makes the adsorption of oxygen more favorable. − To improve the activity even more, addition of transition metals, like iron or cobalt, has yielded catalysts with comparable or better activity than platinum-based materials. − The results show that in alkaline conditions the transition metal–nitrogen–carbon (M–N–C) electrocatalysts work better than in acidic media, which means that they might be suitable cathode materials for the application in an anion exchange membrane fuel cell (AEMFC) …”

Section: Introductionmentioning

confidence: 99%

Cathode Catalysts Based on Cobalt- and Nitrogen-Doped Nanocarbon Composites for Anion Exchange Membrane Fuel Cells

Lilloja

Kisand

Sarapuu

et al. 2020

ACS Appl. Energy Mater.

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Cobalt- and nitrogen-doped carbide-derived carbon/carbon nanotube (CDC/CNT) composites are prepared and used as oxygen reduction reaction (ORR) electrocatalysts for an anion exchange membrane fuel cell (AEMFC) cathode. For the doping, high-temperature pyrolysis is applied using a cobalt salt and a nitrogen precursor (either dicyandiamide, urea, or melamine). During the doping, (i) new mesopores are formed as confirmed by the N2 physisorption results, (ii) atomically dispersed cobalt is present on the catalysts as detected by scanning transmission electron microscopy, and (iii) N-pyridinic and Co–N4 are the dominant N-containing species as shown by X-ray photoelectron spectroscopy. This indicates that using the composite of CDC and CNTs as well as the cobalt salt and nitrogen precursor is advantageous for the preparation of electrocatalysts. All three catalyst materials demonstrate similarly good electrocatalytic activity toward O2 electroreduction in alkaline medium and excellent stability after 10000 repetitive potential cycles. The Co-N-CDC/CNT catalyst as the cathode material together with a hexamethyl-p-terphenyl poly(benzimidazolium) (HMT-PMBI) membrane exhibits excellent AEMFC performance by reaching maximum power density of 577 mW cm–2.

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Effects of N and O groups for oxygen reduction reaction on one- and two-dimensional carbonaceous materials

Cited by 29 publications

References 50 publications

Electrosynthesis of Hydrogen Peroxide through Selective Oxygen Reduction: A Carbon Innovation from Active Site Engineering to Device Design

Electrosynthesis of Hydrogen Peroxide through Selective Oxygen Reduction: A Carbon Innovation from Active Site Engineering to Device Design

Nitrogen and Oxygen Functionalization of Multi‐Walled Carbon Nanotubes for Tuning the Bifunctional Oxygen Reduction/Oxygen Evolution Performance of Supported FeCo Oxide Nanoparticles

Cathode Catalysts Based on Cobalt- and Nitrogen-Doped Nanocarbon Composites for Anion Exchange Membrane Fuel Cells

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