Cu/CuFe2O4 integrated graphite felt as a stable bifunctional cathode for high-performance heterogeneous electro-Fenton oxidation

Hierarchical Iron Phosphides Composite Confined in Ultrathin Carbon Layer as Effective Heterogeneous Electro‐Fenton Catalyst with Prominent Stability and Catalytic Activity

“…[8] Within this context, the heterogeneous EF catalysts require considerable activity for both H 2 O 2 generation and decomposition, [9][10][11] which consequently increase the difficulty in catalyst design and fabrication due to the higher structural complexity of the catalyst. Currently, carbon matrix (C) supported transition metal (TM) materials (TM/C) still majored in the preparation of heterogeneous EF catalyst , [12][13][14] where TM and carbon matrix could serves as the heterogeneous Fenton and 2e − oxygen reduction reaction (ORR) actives sites, [15] respectively. Besides, the carbon matrix could also support the TM particles and promote its electron transfer.…”

Overcoming the Activity–Stability Trade-Off in Heterogeneous Electro-Fenton Catalysis: Encapsulating Carbon Cloth-Supported Iron Oxychloride within Graphitic Layers

“…Catalytic performance metrics, including activity, stability, and Fe leaching reported in the literature for the Fe-integrated carbon-based heterogeneous EF process, were also summarized and compared (Figure e). ,,,,− Most of these functionalized cathodes revealed total Fe leaching concentrations that exceed the limits set by the EU standard (2 mg/L), with relatively high reaction kinetic constants ( k ) but poor stability. For example, the FeOCl/CC cathode prepared in the present study exhibited excellent activity (0.1161 min –1 ) but was only stable for two runs due to its extremely high level of Fe leaching (31.32 mg/L).…”

“…Electrochemical advanced oxidation processes (EAOPs) are increasingly being studied as a promising water decontamination option due to their amenability to automation and suitability for deployment in distributed and modular treatment applications . The electro-Fenton (EF) process, a typical EAOP based on the continuous in-situ electro-generation of Fenton reagents (Fe 2+ + H 2 O 2 ) under a cathodic potential accompanied by the formation of hydroxyl radicals (·OH) (eqs −), has been used to target a diverse range of emerging refractory micropollutants, such as pharmaceuticals, personal care products, and pesticides. − Unfortunately, the large-scale implementation of classic homogeneous EF is limited by the narrow working pH range and non-reusability of the catalyst. , Heterogeneous EF processes with well-designed multifunctional cathodes composed of iron and/or transition metal oxides grafted on carbonaceous substrates provide an attractive alternative to homogeneous EF processes, not only overcoming the aforementioned limitations, but also eliminating the difficulties associated with catalyst dispersion/separation and the adverse effect of suspended catalysts on electrolysis equipments normalO 2 + 2H + + 2e − → normalH 2 normalO 2 Fe 2 + + normalH 2 normalO 2 → Fe 3 + + · OH + OH − Fe 3 + + normale − → Fe 2 + …”

“…To date, numerous studies have focused on the fit-for-purpose integration of solid catalysts (such as iron-containing spinel minerals, alloys, and layered double hydroxides) on carbonaceous materials (such as graphite/carbon felt and carbon aerogels) via mild physical (binder) or chemical (solvothermal and thermal-induced) methods. − ,− Furthermore, the feasibility of use of these catalysts to drive heterogeneous activation processes with satisfactory kinetic characteristics has been demonstrated. However, from the perspectives of both fundamental research and technological application, the development of these structural configurations as alternative tools for wastewater treatment continues to suffer from several significant challenges.…”

Graphitic carbon nitride and carbon nanotubes modified active carbon fiber cathode with enhanced H2O2 production and recycle of Fe3+/Fe2+ for electro-Fenton treatment of landfill leachate concentrate

“…Furthermore, PTFE immobilized g-C 3 N 4 and CNTs onto the ACF and prevented their release and, more importantly, it served as a hydrophobic protective agent to make the electrode more durable in the EF process. 71…”