Insights on Oxygen Reduction Reaction to H2O2: The role of functional groups and textural properties on the activity and selectivity of doped carbon electrocatalysts

Mazzucato, Marco; Durante, Christian

doi:10.1016/j.coelec.2022.101051

Cited by 23 publications

(15 citation statements)

References 65 publications

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“…The materials activity was investigated on a thin catalyst layer loaded on GC surface via drop-casting after the preparation of an ink made approximately of a 9:1 mixture of water, an organic solvent (acetone and THF), and Nafion ( m cat / m nafion solution ≈ 1). To obtain a good dispersion, the ink was sonicated in a bath sonicator for at least 1 h. The loading was chosen to be 0.6 mg cm –2 as used in previous work, knowing that it could have an impact on hydrogen peroxide detection. ,,, …”

Section: Methodsmentioning

confidence: 99%

“…To obtain a good dispersion, the ink was sonicated in a bath sonicator for at least 1 h. The loading was chosen to be 0.6 mg cm −2 as used in previous work, knowing that it could have an impact on hydrogen peroxide detection. 19,41,50,51 All the materials were initially activated in the Ar-purged electrolyte with extensive CV cycling at 200 mV s −1 until a stable current was observed. This generally lasts from 30 to 100 cycles depending on the material.…”

Section: Synthesis Of Snmentioning

confidence: 99%

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Synergistic Effect of Sn and Fe in Fe–N_x Site Formation and Activity in Fe–N–C Catalyst for ORR

Mazzucato

Gavioli

Balzano

et al. 2022

ACS Appl. Mater. Interfaces

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Iron−nitrogen−carbon (Fe−N−C) materials emerged as one of the best non-platinum group material (non-PGM) alternatives to Pt/C catalysts for the electrochemical reduction of O 2 in fuel cells. Co-doping with a secondary metal center is a possible choice to further enhance the activity toward oxygen reduction reaction (ORR). Here, classical Fe−N−C materials were co-doped with Sn as a secondary metal center. Sn−N−C according to the literature shows excellent activity, in particular in the fuel cell setup; here, the same catalyst shows a nonnegligible activity in 0.5 M H 2 SO 4 electrolyte but not as high as expected, meaning the different and uncertain nature of active sites. On the other hand, in mixed Fe, Sn−N−C catalysts, the presence of Sn improves the catalytic activity that is linked to a higher Fe− N 4 site density, whereas the possible synergistic interaction of Fe−N 4 and Sn−N x found no confirmation. The presence of Fe−N 4 and Sn−N x was thoroughly determined by extended X-ray absorption fine structure and NO stripping technique; furthermore, besides the typical voltammetric technique, the catalytic activity of Fe−N−C catalyst was determined and also compared with that of the gas diffusion electrode (GDE), which allows a fast and reliable screening for possible implementation in a full cell. This paper therefore explores the effect of Sn on the formation, activity, and selectivity of Fe−N−C catalysts in both acid and alkaline media by tuning the Sn/Fe ratio in the synthetic procedure, with the ratio 1/2 showing the best activity, even higher than that of the iron-only containing sample (j k = 2.11 vs 1.83 A g −1 ). Pt-free materials are also tested for ORR in GDE setup in both performance and durability tests.

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Section: Methodsmentioning

confidence: 99%

Section: Synthesis Of Snmentioning

confidence: 99%

Synergistic Effect of Sn and Fe in Fe–N_x Site Formation and Activity in Fe–N–C Catalyst for ORR

Mazzucato

Gavioli

Balzano

et al. 2022

ACS Appl. Mater. Interfaces

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“…[29][30][31] To be specic, OFGs can create additional adsorption sites on the carbon surface, and hence increase the number of active sites for electrochemical reactions. [32][33][34][35] Meanwhile, OFGs may modulate the local electronic structures of the catalyst and regulate the free energy of OOH* adsorption (DG OOH* ), 30,36,37 which exerts a signicant impact on the selectivity toward the ORR. 38 As for H 2 O 2 activation, common heterogeneous catalysts include transition metals (TMs, i.e.…”

Section: Introductionmentioning

confidence: 99%

Modulating coal-derived carbon toward electrocatalytic generation of hydroxyl radicals for organic contaminant removal

Zhao,

Chen,

Tang

et al. 2024

J. Mater. Chem. A

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“…The efficiency of EF is mainly dependent on the cathodic H 2 O 2 production. Consequently, in recent years, a growing body of reviews has focused on this reaction, trying to address concerns related to low reactivity/selectivity and limited oxygen mass transport [ 5 – 7 ]. Reviews on other aspects of EF such as the effect of surface modification of carbonaceous cathodes [ 8 , 9 ], reaction mechanisms, influence of key operation parameters, reactor design [ 10 ], coupling with high oxidation power anodes like boron-doped diamond (BDD) thin films [ 11 ], development of heterogeneous catalysts [ 12 ] or treatment of mixtures of pollutants, from sanitary landfill leachates [ 13 ] to arsenic [ 14 ], have been previously published.…”

Section: Introductionmentioning

confidence: 99%

State-of-the-art review and bibliometric analysis on electro-Fenton process

Deng

Jiang²,

Sirés³

2022

Carbon Lett.

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The electro-Fenton (EF) process was first proposed in 1996 and, since then, considerable development has been achieved for its application in wastewater treatment, especially at lab and pilot scale. After more than 25 years, the high efficiency, versatility and environmental compatibility of EF process has been demonstrated. In this review, bibliometrics has been adopted as a tool that allows quantifying the development of EF as well as introducing some useful correlations. As a result, information is summarized in a more visual manner that can be easily analyzed and interpreted as compared to conventional reviewing. During the recent decades under review, 83 countries have contributed to the dramatic growth of EF publications, with China, Spain and France leading the publication output. The top 12 most cited articles, along with the top 32 most productive authors in the EF field, have been screened. Four stages have been identified as main descriptors of the development of EF throughout these years, being each stage characterized by relevant breakthroughs. To conclude, a general cognitive model for the EF process is proposed, including atomic, microscopic and macroscopic views, and future perspectives are discussed. Graphical abstract Supplementary Information The online version contains supplementary material available at 10.1007/s42823-022-00420-z.

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Insights on Oxygen Reduction Reaction to H2O2: The role of functional groups and textural properties on the activity and selectivity of doped carbon electrocatalysts

Cited by 23 publications

References 65 publications

Synergistic Effect of Sn and Fe in Fe–N_x Site Formation and Activity in Fe–N–C Catalyst for ORR

Synergistic Effect of Sn and Fe in Fe–N_x Site Formation and Activity in Fe–N–C Catalyst for ORR

Modulating coal-derived carbon toward electrocatalytic generation of hydroxyl radicals for organic contaminant removal

State-of-the-art review and bibliometric analysis on electro-Fenton process

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Insights on Oxygen Reduction Reaction to H2O2: The role of functional groups and textural properties on the activity and selectivity of doped carbon electrocatalysts

Cited by 23 publications

References 65 publications

Synergistic Effect of Sn and Fe in Fe–Nx Site Formation and Activity in Fe–N–C Catalyst for ORR

Synergistic Effect of Sn and Fe in Fe–Nx Site Formation and Activity in Fe–N–C Catalyst for ORR

Modulating coal-derived carbon toward electrocatalytic generation of hydroxyl radicals for organic contaminant removal

State-of-the-art review and bibliometric analysis on electro-Fenton process

Contact Info

Product

Resources

About

Synergistic Effect of Sn and Fe in Fe–N_x Site Formation and Activity in Fe–N–C Catalyst for ORR

Synergistic Effect of Sn and Fe in Fe–N_x Site Formation and Activity in Fe–N–C Catalyst for ORR