Direct pyrolysis and ultrasound assisted preparation of N, S co-doped graphene/Fe3C nanocomposite as an efficient electrocatalyst for oxygen reduction and oxygen evolution reactions

Rani, Karuppasamy Kohila; Karuppiah, Chelladurai; Wang, Sea‐Fue; Alaswad, Saleh O.; Sireesha, Pedaballi; Devasenathipathy, Rajkumar; Jose, Rajan; Yang, Chun‐Chen

doi:10.1016/j.ultsonch.2020.105111

Cited by 30 publications

(14 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In recent years, transition metals have been broadly used for electrocatalytic water splitting and proved to be a very prospective HER material. Transition metal electrocatalysts can be roughly divided into the following categories: metal phosphides, 5,6,8,10–12,14 metal carbides, 15 metal nitrides, 16,17 metal sulfides, 9 metal selenides 18 and metal borides, 19 etc. Cobalt-based phosphide in HER has a great deal of attention, in which HER properties of cobalt phosphide have been extensively studied.…”

Section: Introductionmentioning

confidence: 99%

“…Carbon materials include carbon black, carbon nanotubes, graphene and their derivatives. 12,15,36,37 Among the above materials, we choose three-dimensional graphene as the support of the catalyst, which has the advantages of large specific surface area, interconnected ordered pore structure, abundant active sites, excellent electrical conductivity, lightweight and good mechanical strength comparing with other carbon materials. 22,34,35 These advantages can enhance the electron transport capacity of the electrocatalyst, increase the contact area between the catalyst and the electrolyte solution, and accelerate the release of reaction gases.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Three-dimensional reduced graphene oxide decorated with cobalt metaphosphate as high cost-efficiency electrocatalysts for the hydrogen evolution reaction

et al. 2022

View full text Add to dashboard Cite

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Three-dimensional reduced graphene oxide decorated with cobalt metaphosphate as high cost-efficiency electrocatalysts for the hydrogen evolution reaction

et al. 2022

View full text Add to dashboard Cite

show abstract

“…To date, several different heating protocols have been reported for this process, e.g., Joule or resistive heating, 9 − 14 ultrasonic heating, 15 , 16 intense pulsed light, 17 infrared, 18 and microwave heating. 19 , 20 In these protocols, the oxygen functionalities of GO are thermally decomposed, the nanostructure is exfoliated, and at the same time, the carbon nanostructure is N-doped, when a suitable nitrogen source is used.…”

Section: Introductionmentioning

confidence: 99%

“…Because high specific surface area and high electrical conductivity are of paramount importance for the electrochemical performance of N-htGOD as an electrode material, efficient methods need to be developed. 5,6,8 To date, several different heating protocols have been reported for this process, e.g., Joule or resistive heating, 9−14 ultrasonic heating, 15,16 intense pulsed light, 17 infrared, 18 and microwave heating. 19,20 In these protocols, the oxygen functionalities of GO are thermally decomposed, the nanostructure is exfoliated, and at the same time, the carbon nanostructure is N-doped, when a suitable nitrogen source is used.…”

Section: ■ Introductionmentioning

confidence: 99%

Improving Electroactivity of N-Doped Graphene Derivatives with Electrical Induction Heating

Nosan

Pavko

Finšgar

et al. 2022

ACS Appl. Energy Mater.

View full text Add to dashboard Cite

Graphene derivatives doped with nitrogen have already been identified as active non-noble metal materials for oxygen reduction reaction (ORR) in PEM and alkaline fuel cells. However, an efficient and scalable method to prepare active, stable, and high-surface-area non-noble metal catalysts remains a challenge. Therefore, an efficient, potentially scalable strategy to improve the specific surface area of N-doped graphene derivatives needs to be developed. Here, we report a novel, rapid, and scalable electrical induction heating method for the preparation of N-doped heat-treated graphene oxide derivatives (N-htGOD) with a high specific surface area. The application of the induction heating method has been shown to shorten the reaction time and improve the energy efficiency of the process. The materials synthesized by induction heating exhibited very high specific surface area and showed improved ORR activity compared to the conventional synthesis method. Moreover, we demonstrated that the temperature program of induction heating could fine-tune the concentration of nitrogen functionalities. In particular, the graphitic-N configuration increases with increasing final temperature, in parallel with the increasing ORR activity. The presented results will contribute to the understanding and development of nonmetal N-htGOD for energy storage and conversion applications.

show abstract

“…This technique affords noteworthy rewards, such as well dispersion, size reduction, particle de-agglomeration, homogenization, and emulsification, etc. [ 21 ]. The advantage of the sonochemical synthesis approach is cost-effectiveness, strong reaction rate, controllable synthesis, narrow particle size distribution, high purity, and nonpolluting [ 22 , 23 ].…”

Section: Introductionmentioning

confidence: 99%

Superparamagnetic ZnFe2O4 Nanoparticles-Reduced Graphene Oxide-Polyurethane Resin Based Nanocomposites for Electromagnetic Interference Shielding Application

et al. 2021

View full text Add to dashboard Cite

Superparamagnetic ZnFe2O4 spinel ferrite nanoparticles were prepared by the sonochemical synthesis method at different ultra-sonication times of 25 min (ZS25), 50 min (ZS50), and 100 min (ZS100). The structural properties of ZnFe2O4 spinel ferrite nanoparticles were controlled via sonochemical synthesis time. The average crystallite size increases from 3.0 nm to 4.0 nm with a rise of sonication time from 25 min to 100 min. The change of physical properties of ZnFe2O4 nanoparticles with the increase of sonication time was observed. The prepared ZnFe2O4 nanoparticles show superparamagnetic behavior. The prepared ZnFe2O4 nanoparticles (ZS25, ZS50, and ZS100) and reduced graphene oxide (RGO) were embedded in a polyurethane resin (PUR) matrix as a shield against electromagnetic pollution. The ultra-sonication method has been used for the preparation of nanocomposites. The total shielding effectiveness (SET) value for the prepared nanocomposites was studied at a thickness of 1 mm in the range of 8.2–12.4 GHz. The high attenuation constant (α) value of the prepared ZS100-RGO-PUR nanocomposite as compared with other samples recommended high absorption of electromagnetic waves. The existence of electric-magnetic nanofillers in the resin matrix delivered the inclusive acts of magnetic loss, dielectric loss, appropriate attenuation constant, and effective impedance matching. The synergistic effect of ZnFe2O4 and RGO in the PUR matrix led to high interfacial polarization and, consequently, significant absorption of the electromagnetic waves. The outcomes and methods also assure an inventive and competent approach to develop lightweight and flexible polyurethane resin matrix-based nanocomposites, consisting of superparamagnetic zinc ferrite nanoparticles and reduced graphene oxide as a shield against electromagnetic pollution.

show abstract

Direct pyrolysis and ultrasound assisted preparation of N, S co-doped graphene/Fe3C nanocomposite as an efficient electrocatalyst for oxygen reduction and oxygen evolution reactions

Cited by 30 publications

References 34 publications

Three-dimensional reduced graphene oxide decorated with cobalt metaphosphate as high cost-efficiency electrocatalysts for the hydrogen evolution reaction

Three-dimensional reduced graphene oxide decorated with cobalt metaphosphate as high cost-efficiency electrocatalysts for the hydrogen evolution reaction

Improving Electroactivity of N-Doped Graphene Derivatives with Electrical Induction Heating

Superparamagnetic ZnFe2O4 Nanoparticles-Reduced Graphene Oxide-Polyurethane Resin Based Nanocomposites for Electromagnetic Interference Shielding Application

Contact Info

Product

Resources

About