One-step synthesis of S, N dual-element doped rGO as an efficient electrocatalyst for ORR

Sun, Yuting; Deng, Ruo-Xi; Chen, Chi; Chen, Xuelu; Pan, Yi‐An; Li, Jian; Xia, Xing‐Hua

doi:10.1016/j.jelechem.2023.117489

Cited by 16 publications

(4 citation statements)

References 46 publications

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“…The diffusion kinetic current density (J K ) shows much higher values for the samples S and P (14.35 and 14.59, respectively), which can be due to a combination of factors like lower oxygen content and a much higher mesoporosity, which could be a direct consequence of the new preparation method versus the conventional one. The direct positive relation between current density and ORR performance is very well known [49]. In terms of electrocatalytic results, sample P is slightly superior to sample S (higher J k and n values and lower initial potential).…”

Section: Electrochemical Characterizationmentioning

confidence: 73%

Facile Synthesis of Carbon-Based Inks to Develop Metal-Free ORR Electrocatalysts for Electro-Fenton Removal of Amoxicillin

Valencia-Valero,

Fajardo-Puerto,

Elmouwahidi

et al. 2024

Gels

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The electro-Fenton process is based on the generation of hydroxyl radicals (OH•) from hydroxide peroxide (H2O2) generated in situ by an oxygen reduction reaction (ORR). Catalysts based on carbon gels have aroused the interest of researchers as ORR catalysts due to their textural, chemical and even electrical properties. In this work, we synthesized metal-free electrocatalysts based on carbon gels doped with graphene oxide, which were conformed to a working electrode. The catalysts were prepared from organic-gel-based inks using painted (brush) and screen-printed methods free of binders. These new methods of electrode preparation were compared with the conventional pasted method on graphite supports using a binder. All these materials were tested for the electro-Fenton degradation of amoxicillin using a homemade magnetite coated with carbon (Fe3O4/C) as a Fenton catalyst. All catalysts showed very good behavior, but the one prepared by ink painting (brush) was the best one. The degradation of amoxicillin was close to 90% under optimal conditions ([Fe3O4/C] = 100 mg L−1, −0.55 V) with the catalyst prepared using the painted method with a brush, which had 14.59 mA cm−2 as JK and a H2O2 electrogeneration close to 100% at the optimal voltage. These results show that carbon-gel-based electrocatalysts are not only very good at this type of application but can be adhered to graphite free of binders, thus enhancing all their catalytic properties.

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Section: Electrochemical Characterizationmentioning

confidence: 73%

Facile Synthesis of Carbon-Based Inks to Develop Metal-Free ORR Electrocatalysts for Electro-Fenton Removal of Amoxicillin

Valencia-Valero,

Fajardo-Puerto,

Elmouwahidi

et al. 2024

Gels

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show abstract

“…[40][41][42] The intensity ratio of I D to I G is a parameter used to determine the amount of defective carbon in the material. 41,43,44 For FePc@N-CNSs and N-CNSs, the I D to I G ratios were 1.60 and 1.46, respectively, which indicates an increase in the number of defects due to the presence of the metal phthalocyanines. 41 The surface chemical composition and valence states were further explored by X-ray photoelectron spectroscopy (XPS) measurements.…”

Section: Synthesis and Structural Characterization Of Catalystsmentioning

confidence: 98%

Regulating the frontier orbital of iron phthalocyanine with nitrogen doped carbon nanosheets for improving oxygen reduction activity

Zhang,

Zheng,

Chang

et al. 2024

Nanoscale

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“…Nitrogen-doped graphene has attracted the investment of many scientific researchers [ 18 , 25 , 54 , 55 ]. As shown in Figure 6 , Dumont et al synthesized GO using the modified Hummers method.…”

Section: Single-atom Doped Carbon Materialsmentioning

confidence: 99%

“…For ORR catalysts, the following basic conditions must be met: (1) good electrical conductivity; (2) high specific surface area; (3) abundant active sites [ 22 ]. Therefore, heteroatomic-doped nano-carbon materials are the most studied among non-metallic catalysts, including single-atom (such as N, S, P and B) doped carbon materials and multi-doped (such as N/S, N/B, N/P and N/P/S) carbon materials [ 6 , 12 , 23 , 24 , 25 , 26 , 27 ]. From the above two aspects, this paper mainly summarizes the preliminary research progress of nonmetallic catalysts in oxygen reduction reactions, aiming at reducing the cost of cathode catalysts, improving the activity and stability of catalysts and prospecting the future research direction of non-platinum-based oxygen reduction catalysts.…”

Section: Introductionmentioning

confidence: 99%

Progress of Nonmetallic Electrocatalysts for Oxygen Reduction Reactions

et al. 2023

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As a key role in hindering the large-scale application of fuel cells, oxygen reduction reaction has always been a hot issue and nodus. Aiming to explore state-of-art electrocatalysts, this paper reviews the latest development of nonmetallic catalysts in oxygen reduction reactions, including single atoms doped with carbon materials such as N, B, P or S and multi-doped carbon materials. Afterward, the remaining challenges and research directions of carbon-based nonmetallic catalysts are prospected.

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One-step synthesis of S, N dual-element doped rGO as an efficient electrocatalyst for ORR

Cited by 16 publications

References 46 publications

Facile Synthesis of Carbon-Based Inks to Develop Metal-Free ORR Electrocatalysts for Electro-Fenton Removal of Amoxicillin

Facile Synthesis of Carbon-Based Inks to Develop Metal-Free ORR Electrocatalysts for Electro-Fenton Removal of Amoxicillin

Regulating the frontier orbital of iron phthalocyanine with nitrogen doped carbon nanosheets for improving oxygen reduction activity

Progress of Nonmetallic Electrocatalysts for Oxygen Reduction Reactions

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