Utilizing spatial confinement effect of N atoms in micropores of coal-based metal-free material for efficiently electrochemical reduction of carbon dioxide

Wei-qi, Liu; Qi, Jiawei; Bai, Peiyao; Zhang, Wendu; Xu, Lang

doi:10.1016/j.apcatb.2020.118974

Cited by 74 publications

(50 citation statements)

References 56 publications

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“…Due to this contribution, the pores provide an entirely different than electrochemistry component to the mechanism, and thus, their influence should not be neglected. That effect of porosity has been also indicated recently in the studies of various CO 2 carbon-based electrocatalysts [86][87][88]. Taking it into account might help to develop even more efficient CO 2 reduction processes.…”

Section: Ultramicropores As Pseudocatalytic Centers Enhancing Oxygen mentioning

confidence: 63%

Exploring the Silent Aspect of Carbon Nanopores

Bandosz

2021

Nanomaterials

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Recently, owing to the discovery of graphene, porous carbons experienced a revitalization in their explorations. However, nowadays, the focus is more on search for suitable energy advancing catalysts sensing, energy storage or thermal/light absorbing features than on separations. In many of these processes, adsorption, although not emphasized sufficiently, can be a significant step. It can just provide a surface accumulation of molecules used in other application-driving chemical or physical phenomena or can be even an additional mechanism adding to the efficiency of the overall performance. However, that aspect of confined molecules in pores and their involvement in the overall performance is often underrated. In many applications, nanopores might silently advance the target processes or might very directly affect or change the outcomes. Therefore, the objective of this communication is to bring awareness to the role of nanopores in carbon materials, and also in other solids, to scientists working on cutting-edge application of nonporous carbons, not necessary involving the adsorption process directly. It is not our intention to provide a clear explanation of the small pore effects, but we rather tend to indicate that such effects exist and that their full explanation is complex, as complex is the surface of nanoporous carbons.

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Section: Ultramicropores As Pseudocatalytic Centers Enhancing Oxygen mentioning

confidence: 63%

Exploring the Silent Aspect of Carbon Nanopores

Bandosz

2021

Nanomaterials

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“…5 a) can be classified as Type I/II [42] , [43] . Specifically, the largely increased adsorption volumes at p/p 0 ≈ 0 indicate the existence of micropores [44] , [45] , the hysteresis loops at p/p 0 = 0.45–0.95 are caused by mesopores [46] , [47] , and the large uptakes at p/p 0 > 0.95 imply the presence of macropores [48] . Both U-MnNiFe@NCB and MnNiFe@NCB are characteristic of hierarchical pores originating from the CB.…”

Section: Resultsmentioning

confidence: 99%

Ultrasonic synthesis of Mn-Ni-Fe tri-metallic oxide anchored on polymer-grafted conductive carbon for rechargeable zinc-air battery

Jin

Bai

et al. 2021

Ultrasonics Sonochemistry

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“…The N atom has a similar size to the C atom but higher electronegativity [26], therefore the defects caused by nitrogen doping can break the electroneutrality of C atoms in the hexagonal carbon structure [27] leading to an enhanced electronic/ionic conductivity without distortion in the local geometry that influences the electrocatalytic activity [28]. Ndoped carbons have shown to be promising candidates as catalysts for the electro-reduction of CO 2 due to the low over-potentials obtained, the high activity, stability, and selectivity towards certain products ascribed to this surface properties modification.…”

Section: N-doped Carbon-based Materialsmentioning

confidence: 99%

“…Nevertheless, the microporous structure can also be effectively used for the enhancement of the CO 2 electrocatalytic conversion to CO by utilizing spatial confinement of N atoms in micropores. Following this strategy, Liu and co-authors [27] obtained a metal-free nitrogen-doped electrocatalyst with a FE towards CO of 95% and a stability of 10 h at −0.65V vs. RHE. Catalytic materials were synthesized by means of the self-assembly method induced by evaporation of a solvent using coal as carbon source, KOH as activator, and dicyandiamide (DICY) as nitrogen resource.…”

Section: Co As Main Productmentioning

confidence: 99%

“…Therefore, for these cases, selectivity is not so related to the presence of a certain functional group, but rather depends on the structure of the carbonaceous material used, in which the micro-meso and macro pores play an important role to efficiently convert CO 2 to CO. The micropores provide abundant active sites, stabilizing the nitrogen species [27,36] while the meso and macro pores allow the contact and easy transport of the reactants and products [38,66].…”

Section: Co As Main Productmentioning

confidence: 99%

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From CO2 to Value-Added Products: A Review about Carbon-Based Materials for Electro-Chemical CO2 Conversion

et al. 2021

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The global warming and the dangerous climate change arising from the massive emission of CO2 from the burning of fossil fuels have motivated the search for alternative clean and sustainable energy sources. However, the industrial development and population necessities make the decoupling of economic growth from fossil fuels unimaginable and, consequently, the capture and conversion of CO2 to fuels seems to be, nowadays, one of the most promising and attractive solutions in a world with high energy demand. In this respect, the electrochemical CO2 conversion using renewable electricity provides a promising solution. However, faradaic efficiency of common electro-catalysts is low, and therefore, the design of highly selective, energy-efficient, and cost-effective electrocatalysts is critical. Carbon-based materials present some advantages such as relatively low cost and renewability, excellent electrical conductivity, and tunable textural and chemical surface, which show them as competitive materials for the electro-reduction of CO2. In this review, an overview of the recent progress of carbon-based electro-catalysts in the conversion of CO2 to valuable products is presented, focusing on the role of the different carbon properties, which provides a useful understanding for the materials design progress in this field. Development opportunities and challenges in the field are also summarized.

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Utilizing spatial confinement effect of N atoms in micropores of coal-based metal-free material for efficiently electrochemical reduction of carbon dioxide

Cited by 74 publications

References 56 publications

Exploring the Silent Aspect of Carbon Nanopores

Exploring the Silent Aspect of Carbon Nanopores

Ultrasonic synthesis of Mn-Ni-Fe tri-metallic oxide anchored on polymer-grafted conductive carbon for rechargeable zinc-air battery

From CO2 to Value-Added Products: A Review about Carbon-Based Materials for Electro-Chemical CO2 Conversion

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