Boosting electrocatalysis of oxygen reduction and evolution reactions with cost-effective cobalt and nitrogen-doped carbons prepared by simple carbonization of ionic liquids

Zdolšek, Nikola; Vujković, Milica; Metin, Önder; Brković, Snežana; Jocić, Ana; Dimitrijević, Aleksandra; Trtić-Petrović, Tatjana; Šljukić, Biljana

doi:10.1016/j.ijhydene.2022.02.225

Cited by 11 publications

(9 citation statements)

References 90 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The higher availability of active sites for ORR on Ag(111) is attributed to the weaker OH − adsorption. Furthermore, Co (moiety) has been presented as an important active site for ORR in alkaline media [ 57 , 58 , 59 , 60 ]. Cu shows high theoretical ORR activity in the volcano plot and has four valence states (Cu(I), Cu(II), Cu(0), and Cu(IV)) which contribute to ORR electrocatalysis [ 61 ].…”

Section: Resultsmentioning

confidence: 99%

Facile Synthesis of Low-Cost Copper-Silver and Cobalt-Silver Alloy Nanoparticles on Reduced Graphene Oxide as Efficient Electrocatalysts for Oxygen Reduction Reaction in Alkaline Media

et al. 2022

Self Cite

View full text Add to dashboard Cite

Copper-silver and cobalt-silver alloy nanoparticles deposited on reduced graphene oxide (CuAg/rGO and CoAg/rGO) were synthesized and examined as electrocatalysts for oxygen reduction reaction (ORR) and hydrogen peroxide reduction reaction (HPRR) in alkaline media. Characterization of the prepared samples was done by transmission electron microscopy (TEM), Fourier-transform infrared spectroscopy (FTIR), Raman spectroscopy, X-ray diffraction analysis (XRD), and scanning electron microscopy with integrated energy-dispersive X-ray spectroscopy (SEM-EDS). CuAg/rGO and CoAg/rGO nanoparticles diameter ranged from 0.4 to 9.2 nm. The Ag loading was ca. 40 wt.% for both electrocatalysts, with that for Cu and Co being 35 and 17 wt.%, respectively. CoAg/rGO electrocatalyst showed a Tafel slope of 109 mV dec−1, significantly lower than that for CuAg/rGO (184 mV dec−1), suggesting faster ORR kinetics. Additionally, a higher diffusion current density was obtained for CoAg/rGO (−2.63 mA cm−2) than for CuAg/rGO (−1.74 mA cm−2). The average value of the number of electrons transferred during ORR was 2.8 for CuAg/rGO and 3.3 for CoAg/rGO electrocatalyst, further confirming the higher ORR activity of the latter. On the other hand, CuAg/rGO showed higher peak current densities (−3.96 mA cm−2) for HPRR compared to those recorded for CoAg/rGO electrocatalyst (−1.96 mA cm−2).

show abstract

Section: Resultsmentioning

confidence: 99%

Facile Synthesis of Low-Cost Copper-Silver and Cobalt-Silver Alloy Nanoparticles on Reduced Graphene Oxide as Efficient Electrocatalysts for Oxygen Reduction Reaction in Alkaline Media

et al. 2022

Self Cite

View full text Add to dashboard Cite

show abstract

“…The activity is further determined by the accessibility and oxidation state of the active sites. 27,28 a The SEM images (Fig. 3) reveal notable differences in the morphology of the materials.…”

Section: Resultsmentioning

confidence: 99%

A mixed-ligand Co metal–organic framework and its carbon composites as excellent electrocatalysts for the oxygen evolution reaction in green-energy devices

Gupta,

Gusmão,

Paul

et al. 2024

Dalton Trans.

Self Cite

View full text Add to dashboard Cite

show abstract

“…These compounds were found to be of interest due to their low cost and their steady improvement of catalytic activities [5]. However, doping carbon materials with precious metals such as Pt, Ir, and Ru was found not to be a logical solution [8], since the doped metals will still contribute to excessive cost. One of the metals that have been used as an effective dopant is cobalt (Co) and it is known that Co and cobalt oxides can accelerate both ORR and OER in alkaline electrolytes [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

“…Dual-doped porous carbon materials might be good candidates as bi-functional electrocatalysts for ORR and OER [8]. Synthesis of dual-doped carbon materials with tunable physicochemical properties usually includes quite complicated procedures [8]. It is often necessary to use different templates and additional chemicals to prepare heteroatom-doped carbons with specific morphology [23][24][25][26], and these procedures are not suitable for industrial, large-scale manufacturing of carbons [8].…”

Section: Introductionmentioning

confidence: 99%

Synergistic Effect of Chlorine and Reaction Parameter Effect on Addition of Sulphur to CNTs and Their use as Electrocatalysts for ORR and OER

Maboya,

Maubane-Nkadimeng

2024

Preprint

View full text Add to dashboard Cite

Electrocatalysts with high activity towards both oxygen reduction and evolution reaction are desirable for metal-air batteries. However, most commercially used electrocatalysts result in sluggish kinetics for these oxygen reactions, and different catalysts are usually used for each oxygen reaction. The development of efficient electrocatalysts that can facilitate both reactions, with low overpotentials resulting in less energy consumption is desirable. Herein we report secondary data analysis for materials developed in our previous study, FeS2 electrocatalyst supported on chlorinated carbon nanotubes (ClCNTs) using chemicals that are not harsh chemicals and investigated its catalytic activity towards ORR and OER. FeS2 nanoparticles were produced by thermal annealing of ClCNTs in thiophene at different annealing temperatures. The effect of thiophene volume and reaction time on the growth of FeS2 nanoparticles was also evaluated. The size of FeS2 nanoparticles coated on the surface of ClCNTs increased with an increase in thermal annealing reaction time, and this reduced the catalytic activity of the materials. Whereas as the volume of thiophene was increased during the production of FeS2-loaded ClCNTs, no FeS2 nanoparticles were observed on the surface of the ClCNTs. ClCNTs annealed at 900 °C showed the greatest growth of FeS2 nanoparticles on their surface and provided the greatest enhancement of the ORR and OER activities, evidenced by the low Tafel slope of 63 mV/dec and low overpotential of 252 mV. The number of electrons involved during the reduction of oxygen was found to be 4, which means that the formation of water was favorable when using this electrocatalyst. In our previous study only, cyclic voltammetry was used to evaluate the electrocatalytic activity of the materials toward ORR.

show abstract

Boosting electrocatalysis of oxygen reduction and evolution reactions with cost-effective cobalt and nitrogen-doped carbons prepared by simple carbonization of ionic liquids

Cited by 11 publications

References 90 publications

Facile Synthesis of Low-Cost Copper-Silver and Cobalt-Silver Alloy Nanoparticles on Reduced Graphene Oxide as Efficient Electrocatalysts for Oxygen Reduction Reaction in Alkaline Media

Facile Synthesis of Low-Cost Copper-Silver and Cobalt-Silver Alloy Nanoparticles on Reduced Graphene Oxide as Efficient Electrocatalysts for Oxygen Reduction Reaction in Alkaline Media

A mixed-ligand Co metal–organic framework and its carbon composites as excellent electrocatalysts for the oxygen evolution reaction in green-energy devices

Synergistic Effect of Chlorine and Reaction Parameter Effect on Addition of Sulphur to CNTs and Their use as Electrocatalysts for ORR and OER

Contact Info

Product

Resources

About