2D polyacrylonitrile brush derived nitrogen-doped carbon nanosheets for high-performance electrocatalysts in oxygen reduction reaction

Cao, Cheng'an; Zhuang, Xiaodong; Su, Yuezeng; Zhang, Yi; Zhang, Fan; Wu, Dongqing; Feng, Xinliang

doi:10.1039/c3py01581e

Cited by 56 publications

(56 citation statements)

References 61 publications

(72 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[6] Inspired by this fact, a series of G-PPFs with controllable porosities have been deliberately designed by employing the polyacrylonitrile-functionalized graphene nanosheet [7] (RGO-PAN) as a template. Dynamic trimerization of aromatic polynitriles has guaranteed the syntheses of porous crystalline or amorphous covalent triazine frameworks (generally abbreviated as CTFs in previous reports).…”

mentioning

confidence: 99%

“…The characteristic absorption peak B (2204 cm À1 ) of RGO-PAN can be attributed to the stretch of the nitrile bond, [7] thus indicating the successful surface functionalization of graphene with polyacrylonitrile. The characteristic absorption peak B (2204 cm À1 ) of RGO-PAN can be attributed to the stretch of the nitrile bond, [7] thus indicating the successful surface functionalization of graphene with polyacrylonitrile.…”

mentioning

confidence: 99%

“…After being thermally treated at temperatures over the melting point of ZnCl 2 (293 8C), the stretches of the nitrile bonds still appear in G-PAN-300, G-PAN-350, and G-PAN-400, thus providing anchors for the nucleation of the triazine-based frameworks on the graphene surface through covalent bonding. [4f, 8] Raman spectra of RGO, G-PPF-p-400, G-PPF-p-600, and G-PPF-p-400-600 (see Figure S4) exhibit two strong peaks at about 1350 and 1580 cm À1 , which can be attributed to the D (disordered) and G (ordered) bands of carbon, [7] respectively. The X-ray diffraction (XRD) patterns of both PPFs and G-PPFs (see Figure S3) exhibit the broadness of the peaks, thus suggesting that these polyaryltriazine-derived networks have amorphous features.…”

mentioning

confidence: 99%

See 2 more Smart Citations

Compact Coupled Graphene and Porous Polyaryltriazine‐Derived Frameworks as High Performance Cathodes for Lithium‐Ion Batteries

Liu

et al. 2014

Angew Chem Int Ed

Self Cite

148

View full text Add to dashboard Cite

It is highly desirable to develop electroactive organic materials and their derivatives as green alternatives of cathodes for sustainable and cost-effective lithium-ion batteries (LIBs) in energy storage fields. Herein, compact two-dimensional coupled graphene and porous polyaryltriazine-derived frameworks with tailormade pore structures are fabricated by using various molecular building blocks under ionothermal conditions. The porous nanosheets display nanoscale thickness, high specific surface area, and strong coupling of electroactive polyaryltriazine-derived frameworks with graphene. All these features make it possible to efficiently depress the dissolution of redox moieties in electrolytes and to boost the electrical conductivity of whole electrode. When employed as a cathode in LIBs, the two-dimensional porous nanosheets exhibit outstanding cycle stability of 395 mAh g(-1) at 5 A g(-1) for more than 5100 cycles and excellent rate capability of 135 mAh g(-1) at a high current density of 15 A g(-1).

show abstract

mentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

See 1 more Smart Citation

Compact Coupled Graphene and Porous Polyaryltriazine‐Derived Frameworks as High Performance Cathodes for Lithium‐Ion Batteries

Liu

et al. 2014

Angew Chem Int Ed

Self Cite

148

View full text Add to dashboard Cite

show abstract

“…The unfavorable molecule (11) can further react with hydroxyl radical anion generated in the reaction mixture through the electrochemically driven homolytic cleavage and create structure (12). The latest may react with hydrogen peroxide (by-product of 2-electron ORR process [29][30][31]) and form N-oxide (13)(14)(15)(16). Furthermore, we speculate that the structure (5) instead of recovering to step (4), is modified under attack of a strong oxidizing agent, H 2 O 2 [29][30][31], generating products (8-9) in Scheme 1.…”

Section: Electrochemical Stabilitymentioning

confidence: 99%

“…One of the most promising is to adapt nitrogen-rich carbon precursors, e.g. organic compounds [11], such as polypyrrole (PPy) [12], polyaniline (PANI) [2] and polyacrylonitrile [13]. In summary, this method provides a high surface area product with homogenous morphology due to low conversion (polymer-to-carbon) temperature, allowing to control better the final properties, such as the surface concentration of nitrogen, and the way it is incorporated in the carbon structure (e.g., as pyrrolic, graphitic, pyridinic or quaternary N-C states) [14].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical stability of the polymer-derived nitrogen-doped carbon: an elusive goal?

Cong

Radtke

Stumpf

et al. 2015

Mater Renew Sustain Energy

View full text Add to dashboard Cite

Nitrogen-doped carbon is a promising metalfree catalyst for oxygen reduction reaction in fuel cells and metal-air batteries. However, its practical application necessitates a significant cost reduction, which can be achieved in part by using new synthetic methods and improvement of catalytic activity by increasing the density of redox active centers. This can be modulated by using polymer as the carbon and nitrogen sources. Although, superior catalytic activity of such N-doped C has been investigated in details, the electrochemical long-term stability of polymer-derived doped-carbon is still unclear. Herein, in this study we generated N-doped carbon from the most recommended polymer that is comparable to the state-of-the-art materials with porosity as high as 2,086 m 2 g -1 and a nitrogen doping level of 3-4 at.%, of which 56 % is pyrrolic N, 36.1 % pyridinic and *8 % graphitic. The electrochemical characterization shows that N-doped carbon is catalytic toward oxygen reduction in an alkaline electrolyte via a favorable four-electron process, however, not stable under long-term potential scanning. The irreversible electrochemical oxidation of this material is associated with the presence of a significant content or pyrrolic and pyridinic N close to the edge of the carbon network originating from the polypyrrole precursor. These structures are less stable under operating electrochemical potential. The role of polypyrrole as the precursor of N-doped carbons has to be carefully revised since it supplies sufficient number of catalytic sites, but also generates unstable functionalities on the carbon surface.

show abstract

Metal‐Phosphide‐Containing Porous Carbons Derived from an Ionic‐Polymer Framework and Applied as Highly Efficient Electrochemical Catalysts for Water Splitting

Han

Feng

Zhang

et al. 2015

Adv Funct Materials

Self Cite

179

100

View full text Add to dashboard Cite

A novel phosphorus‐containing porous polymer is efficiently prepared from tris(4‐vinylphenyl)phosphane by radical polymerization, and it can be easily ionized to form an ionic porous polymer after treatment with hydrogen iodide. Upon ionic exchange, transition‐metal‐containing anions, such as tetrathiomolybdate (MoS4 2−) and hexacyanoferrate (Fe(CN)6 3−), are successfully loaded into the framework of the porous polymer to replace the original iodide anions, resulting in a polymer framework containing complex anions (termed HT‐Met, where Met = Mo or Fe). After pyrolysis under a hydrogen atmosphere, the HT‐Met materials are efficiently converted at a large scale to metal‐phosphide‐containing porous carbons (denoted as MetP@PC, where again Met = Mo or Fe). This approach provides a convenient pathway to the controlled preparation of metal‐phosphide‐loaded porous carbon composites. The MetP@PC composites exhibit superior electrocatalytic activity for the hydrogen evolution reaction (HER) under acidic conditions. In particular, MoP@PC with a low loading of 0.24 mg cm−2 (on a glass carbon electrode) affords an iR‐corrected (where i is current and R is resistance) current density of up to 10 mA cm−2 at 51 mV versus the reversible hydrogen electrode and a very low Tafel slope of 45 mV dec−1, in rotating disk measurements under saturated N2 conditions.

show abstract

2D polyacrylonitrile brush derived nitrogen-doped carbon nanosheets for high-performance electrocatalysts in oxygen reduction reaction

Cited by 56 publications

References 61 publications

Compact Coupled Graphene and Porous Polyaryltriazine‐Derived Frameworks as High Performance Cathodes for Lithium‐Ion Batteries

Compact Coupled Graphene and Porous Polyaryltriazine‐Derived Frameworks as High Performance Cathodes for Lithium‐Ion Batteries

Electrochemical stability of the polymer-derived nitrogen-doped carbon: an elusive goal?

Metal‐Phosphide‐Containing Porous Carbons Derived from an Ionic‐Polymer Framework and Applied as Highly Efficient Electrochemical Catalysts for Water Splitting

Contact Info

Product

Resources

About