Mesoporous fluorine-doped carbon as efficient cathode material for oxygen reduction reaction

First Insight into Fluorinated Pt/Carbon Aerogels as More Corrosion-Resistant Electrocatalysts for Proton Exchange Membrane Fuel Cell Cathodes

“…Among the different ways to obtain fluorinated carbons [22,23,30,31], the carbons were treated by atomic fluorine using the thermal decomposition of XeF 2 [32]. In that process, 200 mg of CA or Pt-CA powders is fluorinated in a closed reactor, to preserve the defined fluorine amount released by the thermal decomposition of XeF 2 .…”

“…In order to limit the corrosion due to the oxidation of the carbon by its own oxygen content at its surface and the effect of the water environment, some of the dangling bonds were saturated with fluorine. So far, few fluorine-doped carbons (of the carbon blacks or template mesoporous carbon families) have been used as catalysts for their activity in alkaline medium [22,23] or in acidic media [24]. Because a high specific surface area of the carbon support is important for an optimized dispersion of platinum nanoparticle, and an adapted porosity is necessary to limit the mass-transport losses, the study has been done on a carbon aerogel substrate, which possesses these two advantages [25].…”

N, F-Codoped Microporous Carbon Nanofibers as Efficient Metal-Free Electrocatalysts for ORR

“…Among these materials, nitrogen (N)-doped carbons are extensively studied because the electronegativity of N (3.04) induces charge redistribution of adjacent atoms in an N-doped carbon surface layer, which greatly enhances the ORR activity of carbon electrocatalysts [14][15][16][17][18]. Besides N, other nonmetal atoms with different electronegativities, such as boron (B) [19,20], sulfur (S) [21,22], phosphorus (P) [23,24], and fluorine (F) [25][26][27][28][29], can enhance the ORR activity of carbon catalysts.…”

Electrochemical Reduction of CO2 to CO by N,S Dual‐Doped Carbon Nanoweb Catalysts

“…XRD and Raman spectroscopy were conducted to study the crystalline structure of the prepared catalysts. As shown in Figure a, two broad diffraction peaks at approximately 24 and 42° were observed in the XRD patterns of all the catalysts, which were attributed to the (0 0 2) and (1 0 0) planes of graphitic carbon, respectively . The (0 0 2) peaks of the NSCNW series catalysts became broader and weaker with increasing amount of S doping, indicating that the carbon structure became more disordered .…”

“…As shown in Fig-ure 2a,t wo broad diffraction peaks at approximately 24 and 428 were observed in the XRD patterns of all the catalysts, which were attributedt ot he (0 02)a nd (1 00)p laneso fg raphitic carbon,r espectively. [26] The (0 02)p eaks of the NSCNW series catalysts becameb roader and weaker with increasing amount of Sd oping, indicatingt hat the carbon structure becamem ore disordered. [27] In addition, two strong peaks centered at approximately 1335cm À1 (D band) and 1580 cm À1 (G band) ( Figure 2b)w ere observed in the Raman spectra of all the catalysts, which are related to disordered and crystalline graphitic carbons, respectively.…”