N-doped carbon nanotubes supported CoSe2 nanoparticles: A highly efficient and stable catalyst for H2O2 electrosynthesis in acidic media

Zhang, Longcheng; Liang, Jie; Yue, Luchao; Xu, Zhaoquan; Dong, Kai; Liu, Qian; Luo, Yonglan; Li, Tingshuai; Cheng, Xiaohong; Cui, Guanwei; Tang, Bo; Alshehri, Abdulmohsen Ali; Alzahrani, Khalid Ahmed; Guo, Xiaodong

doi:10.1007/s12274-021-3474-0

Cited by 113 publications

(74 citation statements)

References 49 publications

(54 reference statements)

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“…An appropriate electrocatalyst‐electrolyte combination may help drive the selectivity of the water oxidation reaction toward H 2 O 2 instead of O 2 thus allowing for the sustainable electrochemical production of two valuable commodities (H 2 and H 2 O 2 ) during water electrolysis. This present work at the anode may also be integrated with the two‐electron oxygen reduction reaction (2e − ORR) at the cathode, [44−48] to achieve high rate electrosynthesis of H 2 O 2 at both electrodes using a single pass of charge. Given that anodic electrochemical generation of H 2 O 2 in carbonate is still in its infancy, further research into the precise role of CO 3 2− on the reaction mechanism is necessary.…”

Section: Discussionmentioning

confidence: 99%

Carbonate‐Induced Electrosynthesis of Hydrogen Peroxide via Two‐Electron Water Oxidation

et al. 2022

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Electrochemical synthesis of hydrogen peroxide (H2O2), via the two‐electron water oxidation reaction (2e− WOR), is an attractive method for the sustainable production of valuable chemicals in place of oxygen during water electrolysis. While the majority of 2e− WOR studies have focussed on electrocatalyst design, little research has been carried out on the selection of the supporting electrolyte. In this work, we investigate the impact of potassium carbonate (K2CO3) electrolytes, and their key properties, on H2O2 production. We found that at electrolyte pH values (>9.5) where the carbonate anion (CO32−) was prevalent in the mixture, a 26.5 % increase in the Faraday efficiency (%FE) for H2O2 production was achieved, compared to bicarbonate (HCO3−) dominant solutions. Utilising boron‐doped diamond (BDD) in highly concentrated K2CO3 solutions, current densities of up to 511 mA cm−2 (in 4 m) and %FEs of 91.5 % (in 5 m) could be attained. The results presented in this work highlight the influence of CO32− on electrochemical H2O2 generation via the 2e− WOR and provide novel pathways to produce desirable commodities at the anode during electrochemical water splitting.

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Section: Discussionmentioning

confidence: 99%

Carbonate‐Induced Electrosynthesis of Hydrogen Peroxide via Two‐Electron Water Oxidation

et al. 2022

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“…1e) can be divided into three types of N species, including graphitic-N (400.7 eV), pyrrolic-N (400.1 eV), and pyridinic-N (397.9 eV). 48,49 displayed in Fig. 1f, the high-resolution Co 2p spectrum can be deconvoluted into two characteristic bands at 793.3 eV and 777.7 eV, corresponding to the Co 2p 1/2 and Co 2p 3/2 , with two satellite peaks at 802.3 eV and 783.9 eV (identified as Sat.).…”

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Co–NCNT nanohybrid as a highly active catalyst for the electroreduction of nitrate to ammonia

et al. 2022

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“…In contrast, both the CP and p-TiO 2 /CP are almost inactive for O 2 reduction. The amounts of H 2 O 2 in the electrolyte after 1 h potentiostatic electrolysis are evaluated using colorimetric methods (Ce 4+ is used to be a reactant to consume H 2 O 2 ). , Relevant calibration curves are shown in Figure S5. Figure e presents the H 2 O 2 yield and Faradaic efficiency (FE) of Mn-TiO 2 at each given potential.…”

Section: Resultsmentioning

confidence: 99%

Greatly Facilitated Two-Electron Electroreduction of Oxygen into Hydrogen Peroxide over TiO₂ by Mn Doping

Chen

Yan

et al. 2021

ACS Appl. Mater. Interfaces

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Ambient electrochemical oxygen reduction into valuable hydrogen peroxide (H2O2) via a selective two-electron (2e–) pathway is regarded as a sustainable alternative to the industrial anthraquinone process, but it requires advanced electrocatalysts with high activity and selectivity. In this study, we report that Mn-doped TiO2 behaves as an efficient electrocatalyst toward highly selective H2O2 synthesis. This catalyst exhibits markedly enhanced 2e– oxygen reduction reaction performance with a low onset potential of 0.78 V and a high H2O2 selectivity of 92.7%, much superior to the pristine TiO2 (0.64 V, 62.2%). Additionally, it demonstrates a much improved H2O2 yield of up to 205 ppm h–1 with good stability during bulk electrolysis in an H-cell device. The significantly boosted catalytic performance is ascribed to the lattice distortion of Mn-doped TiO2 with a large amount of oxygen vacancies and Ti3+. Density functional theory calculations reveal that Mn dopant improves the electrical conductivity and reduces ΔG *OOH of pristine TiO2, thus giving rise to a highly efficient H2O2 production process.

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N-doped carbon nanotubes supported CoSe2 nanoparticles: A highly efficient and stable catalyst for H2O2 electrosynthesis in acidic media

Cited by 113 publications

References 49 publications

Carbonate‐Induced Electrosynthesis of Hydrogen Peroxide via Two‐Electron Water Oxidation

Carbonate‐Induced Electrosynthesis of Hydrogen Peroxide via Two‐Electron Water Oxidation

Co–NCNT nanohybrid as a highly active catalyst for the electroreduction of nitrate to ammonia

Greatly Facilitated Two-Electron Electroreduction of Oxygen into Hydrogen Peroxide over TiO₂ by Mn Doping

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N-doped carbon nanotubes supported CoSe2 nanoparticles: A highly efficient and stable catalyst for H2O2 electrosynthesis in acidic media

Cited by 113 publications

References 49 publications

Carbonate‐Induced Electrosynthesis of Hydrogen Peroxide via Two‐Electron Water Oxidation

Carbonate‐Induced Electrosynthesis of Hydrogen Peroxide via Two‐Electron Water Oxidation

Co–NCNT nanohybrid as a highly active catalyst for the electroreduction of nitrate to ammonia

Greatly Facilitated Two-Electron Electroreduction of Oxygen into Hydrogen Peroxide over TiO2 by Mn Doping

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Product

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Greatly Facilitated Two-Electron Electroreduction of Oxygen into Hydrogen Peroxide over TiO₂ by Mn Doping