P-doped mesoporous carbons for high-efficiency electrocatalytic oxygen reduction

Zhao, Hui; Hu, Zhong-Pan; Zhu, Yanjun; Li, Ge; Yuan, Zhong‐Yong

doi:10.1016/s1872-2067(19)63363-2

Cited by 41 publications

(19 citation statements)

References 39 publications

(34 reference statements)

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“…Therefore, after NaBH 4 treatment, the spectra centers of the obtained PNC−B and PNC−B/E are obviously shifted to lower binding energy for decreasing ∼0.4 eV compared to PNC and PNC−E (seen the inset of Figure 3a). Commonly, the binding energy of P−C, P−N and P−O bonds are at 132.7 eV, 133.4 eV and 135.2 eV, respectively [15,26,40–42] . Accordingly, the P 2p spectra of PNC and PNC−E were fitted, as shown in Figure 3a.…”

Section: Resultsmentioning

confidence: 99%

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Study on the Simple Surface Treatments of N, P Dual‐doped Carbon as Metal‐free Catalyst for Metal‐air Batteries

Zhang

2020

ChemCatChem

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N, P dual‐doped porous carbon with high specific surface area of ∼2000 m2 g−1 was prepared via foaming‐carbonization process. It was demonstrated that the simple surface treatment and modification can conveniently further improve the catalytic performance of oxygen reduction reaction (ORR). The results showed that chemisorbed phosphorus can promote the surface treatment of sodium borohydride (NaBH4). The modified novel sites, adsorbing water molecules of a semi‐free state, promoted the offensive key steps of H2O molecules in ORR. After post‐treatment, the limit current density increased from 5.0 to 6.1 mA cm−2 with a decreased Tafel slope and the onset potential positively shifted. This surface‐modified catalyst was applied to Zn‐air battery and Al‐air battery, and had exhibited good applicability and excellent performances. This work illustrates that the simple post‐treatments can conveniently and effectively improve the ORR performance of metal‐free carbon catalysts.

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Section: Resultsmentioning

confidence: 99%

“…Commonly, the binding energy of PÀ C, PÀ N and PÀ O bonds are at 132.7 eV, 133.4 eV and 135.2 eV, respectively. [15,26,[40][41][42] Accordingly, the P 2p spectra of PNC and PNCÀ E were fitted, as shown in Figure 3a. For PNC, the P element mainly exists in the form of PÀ N bonds.…”

Section: Resultsmentioning

confidence: 99%

Study on the Simple Surface Treatments of N, P Dual‐doped Carbon as Metal‐free Catalyst for Metal‐air Batteries

Zhang

2020

ChemCatChem

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“…While small-angle XRD patterns ( Figure 2B) of as-prepared electrocatalysts showed a mainly well-shaped peak at 2θ ≈ 1 , suggesting their ordered mesopore structure. [29][30][31] Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) are effective techniques to characterize the pore structure. The SEM pattern of highly ordered PMMA nanospheres prepared by emulsifier-free emulsion polymerization and horizontal deposition procedure was displayed in Figure 3A.…”

Section: Characterization Of the Catalystsmentioning

confidence: 99%

Co‐N‐doped hierarchically ordered macro/mesoporous carbon as bifunctional electrocatalyst toward oxygen reduction/evolution reactions

Meng

Chen

Cai

et al. 2020

Intl J of Energy Research

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Exploring progressed activity and stability, electrocatalyst toward oxygen reduction reaction (ORR) and oxygen evolution reaction (OER), has been the most considerable factor in extensive commercialization of metal-air batteries and fuel cells. Herein, Co/N co-doped 3D hierarchical porous bifunctional oxygen electrocatalyst was synthesized using F127 as soft template and PMMA nanosphere as hard template to build hierarchically ordered macro/mesoporous porous nanostructure. The as-obtained macro/mesoporous CoN doped carbon endowing its 3D ordered hierarchical porosity and satisfactory surface area, leading to superior performance for ORR, OER, and rechargeable Zn-air battery. For ORR, the catalyst showed superior ORR activity with an attractive half-wave potential of 0.85 V (vs RHE), remarkable methanol tolerance, and robust long-term stability under alkaline electrolyte. For OER, the assynthetized electrocatalyst exhibited low overpotential of 1.67 V (vs RHE) under the current density of 10 mA/cm 2. Moreover, the Zn-air battery assembled from the hierarchical porous catalyst displayed a high peak power density of 146 mW/cm 2 .

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“…In principle, further modification of carbon materials through controlling the chemical composition and engineering desirable structure would energetically enhance electrocatalytic performance . On the one hand, the intentional introduction of non‐metal elements (N, F, P, S, etc ) into carbon materials can tailor their chemical and electronic properties, create the active sites and boost the O 2 adsorption, thus boosting the reduction reactions . Noticeably, recent researches have proved that doping two types of dopants into carbon materials can induce a synergistic effect based on the charge and spin density changes at the various sites of co‐doped materials, which would enhance reaction kinetics, exhibiting superior performance compared with single‐doped carbon catalysts .…”

Section: Introductionmentioning

confidence: 99%

Melamine‐Induced N,S‐Codoped Hierarchically Porous Carbon Nanosheets for Enhanced Electrocatalytic Oxygen Reduction

Tian

Ren

et al. 2020

ChemistrySelect

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Exploring an efficient strategy to enhance the catalytic oxygen reduction performance of carbon‐based catalysts is of great significance in the field of electrocatalysis. In this work, through a facile polymerization‐carbonization approach under the regulation of melamine, N,S‐codoped hierarchically porous carbon nanosheets with controllable morphology are fabricated by using polyaniline as the precursor. The resultant catalysts have favorable features of the synergetic effect of N,S co‐doping and the advanced structural property with high specific surface area and hierarchical pore structure, contributing to an encouraging onset potential (Eonset = 0.94 V) in alkaline media, comparable to that of Pt/C catalysts, as well as excellent electrochemical stability and methanol tolerance. By rationally adjusting the experimental parameters, the mechanism of melamine on the formation of final porous nanosheet structure during high‐temperature pyrolysis is clarified, and the optimal experimental conditions for the superior catalysts are also discussed. Furthermore, a rechargeable Zn‐air battery constructed with the resulting materials exhibits desirable performance with low charge‐discharge gap and impressive life‐span. This contribution would supply some novel inspiration to design carbon‐based materials with desired features for energy‐related technologies.

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P-doped mesoporous carbons for high-efficiency electrocatalytic oxygen reduction

Cited by 41 publications

References 39 publications

Study on the Simple Surface Treatments of N, P Dual‐doped Carbon as Metal‐free Catalyst for Metal‐air Batteries

Study on the Simple Surface Treatments of N, P Dual‐doped Carbon as Metal‐free Catalyst for Metal‐air Batteries

Co‐N‐doped hierarchically ordered macro/mesoporous carbon as bifunctional electrocatalyst toward oxygen reduction/evolution reactions

Melamine‐Induced N,S‐Codoped Hierarchically Porous Carbon Nanosheets for Enhanced Electrocatalytic Oxygen Reduction

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