Defective Carbon-Based Materials for the Electrochemical Synthesis of Hydrogen Peroxide

Chen, Shu‐Cheng; Chen, Zhihua; Siahrostami, Samira; Kim, Taeho Roy; Nordlund, Dennis; Sokaras, Dimosthenis; Nowak, S.; To, John W. F.; Higgins, Drew; Sinclair, Robert; Nørskov, Jens K.; Jaramillo, Thomas F.; Bao, Zhenan

doi:10.1021/acssuschemeng.7b02517

Cited by 271 publications

(254 citation statements)

References 45 publications

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“…Chen et al [13] also investigated the effect of defects in porous carbon catalysts on ORR performance. The mesoporous carbon and microporous carbon prepared with a large number of sp 2 -C defects (Fig.…”

Section: Sp 2 -C Defectsmentioning

confidence: 99%

“…However, finite reserves and high costs of precious metals limit their large-scale applications [12]. Alternatively, carbonaceous materials have been identified as efficient catalysts because of their abundance, high stability in electrochemical reactions, and tunable surface and structural properties [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

“…an optimized adsorption/desorption energy to the reaction intermediate (*OOH). Thus, numerous strategies, including defect design [13,17] and heteroatom doping [12,[18][19][20][21][22][23][24][25], have been adopted to optimize the electronic structure to improve the activity and selectivity of carbon materials (Fig. 1).…”

Section: Introductionmentioning

confidence: 99%

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Recent Progress on Carbonaceous Material Engineering for Electrochemical Hydrogen Peroxide Generation

Zhang

et al. 2020

Trans. Tianjin Univ.

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Electrochemical synthesis of hydrogen peroxide (H 2 O 2) provides a clean and safe technology for large-scale H 2 O 2 production. The core of this project is the development of highly active and highly selective catalysts. Recent studies demonstrate that carbonaceous materials are favorable catalysts because of their low-cost and tunable surface structures. This brief review first summarizes the strategies of carbonaceous material engineering for selective two-electron O 2 reduction reaction and discusses potential mechanisms. In addition, several device designs using carbonaceous materials as catalysts for H 2 O 2 production are introduced. Finally, research directions are proposed for practical application and performance improvement.

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Section: Sp 2 -C Defectsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Recent Progress on Carbonaceous Material Engineering for Electrochemical Hydrogen Peroxide Generation

Zhang

et al. 2020

Trans. Tianjin Univ.

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“…It could be recalled from the FT‐IR studies that NaOH etched OMC possess more functional groups which are derived from the defective sites. These defective sites lead to adsorb oxygen intermediate species such as O*, OH* and OOH* to enhance the ORR activity …”

Section: Resultsmentioning

confidence: 94%

Investigation on Template Etching Process of SBA‐15 Derived Ordered Mesoporous Carbon on Electrocatalytic Oxygen Reduction Reaction

et al. 2019

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Ordered mesoporous carbon (OMC) is a promising material for oxygen reduction reaction (ORR) in fuel cells owing to its high surface area and more number of catalytic active sites. Herein, OMC was synthesized by hard template method, i. e., nanocasting of sacrificial silica template (SBA-15) and then the sacrificial template was abolished using three different etching chemicals namely, hydrofluoric acid (HF), sodium hydroxide (NaOH) and polyvinylidene fluoride (PVDF) respectively, in order to study the etching effect. The etched OMCs derived from the SBA-15 template was confirmed by various characterization techniques. In OMC, the porous nature, surface morphology and defect density changes with respect to etching chemicals were evidently determined. From the electrochemical studies, it has been concluded that the NaOH etched OMC showed higher electrocatalytic activity than others by exhibiting more positive onset (0.83 V), half-wave potential (0.75 V), high current density (3.3 mA/cm 2 ), Tafel slope (83 mV/ dec) and n-value (2.4). Eventually, the electrochemical impedance study (EIS) was performed to determine the charge transfer resistance (R ct ) of various etched OMCs and has been found that NaOH etched OMC shows the lowest R ct value due to the presence of more defective sites and result in enhancing oxygen adsorption during ORR.[a] V.

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“…Recently, carbon-based catalysts have emerged as an alternate material for existing metal-based technologies [28,29]. For example, carbon nanotubes (CNTs) have been well studied for their catalytic activity, although conflicting reports exist due to the presence of unavoidable metallic impurities present [30][31][32][33].…”

Section: Introductionmentioning

confidence: 99%

Electrochemically derived functionalized graphene for bulk production of hydrogen peroxide

Yeddala¹,

Thakur²,

Anugraha³

et al. 2020

Beilstein J. Nanotechnol.

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On-site peroxide generation via electrochemical reduction is gaining tremendous attention due to its importance in many fields, including water treatment technologies. Oxidized graphitic carbon-based materials have been recently proposed as an alternative to metal-based catalysts in the electrochemical oxygen reduction reaction (ORR), and in this work we unravel the role of C=O groups in graphene towards sustainable peroxide formation. We demonstrate a versatile single-step electrochemical exfoliation of graphite to graphene with a controllable degree of oxygen functionalities and thickness, leading to the formation of large quantities of functionalized graphene with tunable rate parameters, such as the rate constant and exchange current density. Higher oxygen-containing exfoliated graphene is known to undergo a two-electron reduction path in ORR having an efficiency of about 80 ± 2% even at high overpotential. Bulk production of H 2 O 2 via electrolysis was also demonstrated at low potential (0.358 mV vs RHE), yielding ≈34 mg/L peroxide with highly functionalized (≈23 atom %) graphene and ≈16 g/L with low functionalized (≈13 atom %) graphene, which is on par with the peroxide production using state-of-the-art precious-metal-based catalysts. Hence this method opens a new scheme for the single-step large-scale production of functionalized carbon-based catalysts (yield ≈45% by weight) that have varying functionalities and can deliver peroxide via the electrochemical ORR process. 432

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Defective Carbon-Based Materials for the Electrochemical Synthesis of Hydrogen Peroxide

Cited by 271 publications

References 45 publications

Recent Progress on Carbonaceous Material Engineering for Electrochemical Hydrogen Peroxide Generation

Recent Progress on Carbonaceous Material Engineering for Electrochemical Hydrogen Peroxide Generation

Investigation on Template Etching Process of SBA‐15 Derived Ordered Mesoporous Carbon on Electrocatalytic Oxygen Reduction Reaction

Electrochemically derived functionalized graphene for bulk production of hydrogen peroxide

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