Hierarchical sulfur and nitrogen co-doped carbon nanocages as efficient bifunctional oxygen electrocatalysts for rechargeable Zn-air battery

Fan, Hao; Wang, Yu; Gao, Fujie; Yang, Longqi; Li, Meng; Du, Xiaoqiang; Wang, Peng; Yang, Lijun; Wu, Qiang; Wang, Xizhang; Hu, Zheng

doi:10.1016/j.jechem.2018.09.003

Cited by 72 publications

(25 citation statements)

References 79 publications

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“…By heteroatom doping, the properties of the carbon materials can be significantly changed in contrast to pristine ones. The introduction of heteroatoms with different size and electronegativity into the carbon matrix can induce charge and spin redistribution among the around carbon atoms, leading to the modification of electronic properties and other chemical activities for many applications [6,18,26,33,[58][59][60][61][62].…”

Section: Heteroatom Dopingmentioning

confidence: 99%

“…As known, the formation of partial positive and partial negative charges is in favor of the interaction and adsorption with O 2 and the related species on the carbon-based materials [ 20 , 21 ]. Strangely, S and Se atoms have a similar electronegativity to carbon, but the obtained carbon nanomaterials also describe a good ORR activity, which is attributed to the structural distortions and changes of the charge/spin densities in carbon materials [ 2 , 22 , 25 , 61 ]. The above-mentioned results demonstrate that the electrocatalytic ORR activity of the doped carbon not only associates with the charge distribution but also with the disruption of the uniformity of the carbon matrix.…”

Section: Heteroatom Dopingmentioning

confidence: 99%

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Defect and Doping Co-Engineered Non-Metal Nanocarbon ORR Electrocatalyst

et al. 2021

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Exploring low-cost and earth-abundant oxygen reduction reaction (ORR) electrocatalyst is essential for fuel cells and metal–air batteries. Among them, non-metal nanocarbon with multiple advantages of low cost, abundance, high conductivity, good durability, and competitive activity has attracted intense interest in recent years. The enhanced ORR activities of the nanocarbons are normally thought to originate from heteroatom (e.g., N, B, P, or S) doping or various induced defects. However, in practice, carbon-based materials usually contain both dopants and defects. In this regard, in terms of the co-engineering of heteroatom doping and defect inducing, we present an overview of recent advances in developing non-metal carbon-based electrocatalysts for the ORR. The characteristics, ORR performance, and the related mechanism of these functionalized nanocarbons by heteroatom doping, defect inducing, and in particular their synergistic promotion effect are emphatically analyzed and discussed. Finally, the current issues and perspectives in developing carbon-based electrocatalysts from both of heteroatom doping and defect engineering are proposed. This review will be beneficial for the rational design and manufacturing of highly efficient carbon-based materials for electrocatalysis.

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Section: Heteroatom Dopingmentioning

confidence: 99%

Section: Heteroatom Dopingmentioning

confidence: 99%

Defect and Doping Co-Engineered Non-Metal Nanocarbon ORR Electrocatalyst

et al. 2021

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“…Similarly, Hu et al reported a novel 3D hierarchical S-and N-codoped carbon nanocage termed "hSNCNC" as a bifunctional oxygen electrocatalyst, where MgO nanocubes were used as a template and a pyridine and thiophene mixture as a precursor. 34 The as-prepared hSNCNC exhibited a positive half-wave potential of 0.792 V (vs reversible hydrogen electrode, RHE) for the ORR and a low operating potential of 1.640 V at a 10 mA cm −2 current density for the OER. The reversible oxygen electrode index was 0.847 V, superior to those of commercial Pt/C and IrO 2 .…”

Section: Template Methodsmentioning

confidence: 98%

Polymer-Derived Heteroatom-Doped Porous Carbon Materials

et al. 2020

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Heteroatom-doped porous carbon materials (HPCMs) have found extensive applications in adsorption/separation, organic catalysis, sensing, and energy conversion/storage. The judicious choice of carbon precursors is crucial for the manufacture of HPCMs with specific usages and maximization of their functions. In this regard, polymers as precursors have demonstrated great promise because of their versatile molecular and nanoscale structures, modulatable chemical composition, and rich processing techniques to generate textures that, in combination with proper solid-state chemistry, can be maintained throughout carbonization. This Review comprehensively surveys the progress in polymer-derived functional HPCMs in terms of how to produce and control their porosities, heteroatom doping effects, and morphologies and their related use. First, we summarize and discuss synthetic approaches, including hard and soft templating methods as well as direct synthesis strategies employing polymers to control the pores and/or heteroatoms in HPCMs. Second, we summarize the heteroatom doping effects on the thermal stability, electronic and optical properties, and surface chemistry of HPCMs. Specifically, the heteroatom doping effect, which involves both single-type heteroatom doping and codoping of two or more types of heteroatoms into the carbon network, is discussed. Considering the significance of the morphologies of HPCMs in their application spectrum, potential choices of suitable polymeric precursors and strategies to precisely regulate the morphologies of HPCMs are presented. Finally, we provide our perspective on how to predefine the structures of HPCMs by using polymers to realize their potential applications in the current fields of energy generation/conversion and environmental remediation. We believe that these analyses and deductions are valuable for a systematic understanding of polymer-derived carbon materials and will serve as a source of inspiration for the design of future HPCMs.

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“…Therefore, as-prepared electrode exhibited superior activity for both ORR (g 1/2 = 426 mV) and OER (g j=10 = 485 mV), as well as excellent stability in basic media with an evaluation by chronoamperometry at 0.4 and 1.63 V. Through the comparative study of the catalysts with the varied contents of N and S, it was deduced that pyridine N, graphitic N, C = S and C À S are the effective dopants for carbon lattice to catalyze ORR and OER. Additionally, several N, S co-doped nanocarbon materials have been also prepared and demonstrated as bifunctional catalyst for OER and ORR, such as N, S-enriched hierarchically porous carbon, 3D hierarchical N, S co-doped carbon nanocages, N, S co-doped carbon nanosheets and mesoporous carbon on N, S co-doped graphene nanosheets [13,111,112]. However, the study of active sites was rarely mentioned among these reports.…”

Section: Nitrogen and Sulfur Co-doping/functionalization Nanocarbonmentioning

confidence: 99%

“…Oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) are the key electrode processes for these renewal energy systems [5][6][7][8]. However, since both ORR and OER processes suffer from sluggish kinetics, the electrocatalysts catalyzing ORR/OER are critical in these fields [9][10][11][12][13]. At present, noble metals and their oxides, such as platinum (Pt), iridium oxide (IrO 2 ) and ruthenium oxide (RuO 2 ), have been demonstrated to be the best electrocatalysts for ORR or OER, but they suffer from the scarcity and high cost [14][15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%