Porous carbon monoliths for electrochemical removal of aqueous herbicides by “one-stop” catalysis of oxygen reduction and H2O2 activation

Yu, Menglin; Dong, Heng; Li, Kai; Zheng, Yingdie; Hoffmann, Michael R.; Liu, Weiping

doi:10.1016/j.jhazmat.2021.125592

Cited by 13 publications

(4 citation statements)

References 56 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“… Notably, PCM–DDA had the substantially highest C–C/CC peak area ratio (0.92) compared with PCM–PDA (0.26) and PCM–EA (0.81) (Table S3). The sp 3 C–C peak is intimately related to the formation of defects in the graphite basal plane or at the edge, which is beneficial for *OOH accumulation in electrocatalysis . However, no obvious peaks were observed in the N 1s spectrum, indicating that the N element in the material was negligible (Figure S4).…”

Section: Resultsmentioning

confidence: 99%

“…The sp 3 C−C peak is intimately related to the formation of defects in the graphite basal plane or at the edge, which is beneficial for *OOH accumulation in electrocatalysis. 26 However, no obvious peaks were observed in the N 1s spectrum, indicating that the N element in the material was negligible (Figure S4). Furthermore, N 2 adsorption−desorption measurements were performed to the exploration of the specific surface area and the pore structure of different PCM catalysts (Figure S5).…”

Section: Characterization Of the Gas-diffusion Electrodementioning

confidence: 99%

See 1 more Smart Citation

Molecular-Level Tuning of Active Sites of the Carbonaceous Catalyst for Boosting Electrochemical H₂O₂ Production and its Application in Electro-Fenton-like Degradation of Organics

Li,

Lu,

Chen

et al. 2024

ACS EST Eng.

View full text Add to dashboard Cite

Constructing effective cathode materials for simultaneously producing and activating H 2 O 2 to achieve functional reduction of O 2 for • OH production is crucial for the development of a heterogeneous electro-Fenton process in wastewater treatment. In this study, the active groups of the carbonaceous catalyst for electrochemical O 2 reduction have been tuned and identified from the molecular level. Proton amines and pyrolysis temperature present significant influences on the polymerization process of the phenolic-formaldehyde resin, thereby altering the structure, functional groups, defects, and activity of the carbonized phenolic-formaldehyde catalyst. A graphite felt-based gas-diffusion electrode composed of the active carbonaceous catalyst, organic binder, and transition metal species has been employed in the electron-Fenton-like system to achieve highly selective H 2 O 2 and • OH production for water decontamination. The optimized gas-diffusion electrode exhibits a high H 2 O 2 selectivity of 87.6−92.4% at 0.2−0.4 V vs standard hydrogen electrode (SHE), a higher current efficiency of 99.1%, and a H 2 O 2 production rate of 6.29 mg cm −2 h −1 at 10 mA cm −2 , respectively. Furthermore, owing to the efficient decomposition of H 2 O 2 into • OH by Mn n+ species, humic acid can be efficiently degraded in an electron-Fenton-like process. The electrochemical oxidation performance and energy consumption efficiency for the treatment of real landfill leachate have been evaluated. The results demonstrate that the relational design and fabrication of a high-performance gas-diffusion electrode based on regulating the active carbonaceous O 2 reduction catalyst and H 2 O 2 activation catalyst have huge potential for electrochemical wastewater treatment.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Characterization Of the Gas-diffusion Electrodementioning

confidence: 99%

Molecular-Level Tuning of Active Sites of the Carbonaceous Catalyst for Boosting Electrochemical H₂O₂ Production and its Application in Electro-Fenton-like Degradation of Organics

Li,

Lu,

Chen

et al. 2024

ACS EST Eng.

View full text Add to dashboard Cite

show abstract

“…The Henry coefficient is a temperature-dependent function related to the chemical potential, entropy, and partial molar heat capacity. This empirical formula by Tromans has been widely used in chemical and environmental engineering [31,32].…”

Section: Mass Transfermentioning

confidence: 99%

Modeling Wet Air Oxidation of Sodium Acetate in a Bubble Column

Bi,

Qin,

Xie

et al. 2023

Processes

View full text Add to dashboard Cite

Scale-up bubble columns for wet air oxidation (WAO) represent a novel solution to the growing problem of sodium acetate-containing waste discharge. This study used an axial dispersion model to simulate a reactor at a high temperature of 320 °C. By minimizing the structure size and gas fed into the system, the estimated optimal reactor dimensions were obtained. At the optimized reactor diameter, total height, initial oxygen partial pressure, and superficial gas velocity of 1 m, 7 m, 40 bar, and 0.07 m/s, respectively, a degradation efficiency of over 90% was obtained, at which the residual concentration of sodium acetate degraded from 700 mol/m3 to 70 mol/m3. The axial distributions of the dissolved oxygen, sodium acetate, and oxygen concentrations in the gas were nearly uniform. The bubble column reactor exhibited an intermediate state between well-mixed flow and plug flow for both liquid and gas.

show abstract

“…The prepared catalyst PCM-HDA achieved a high H 2 O 2 production of 1031 mmol•g cat −1 •h −1 in acidic environment. [14] Besides, Li et al synthesized B, S codoped porous carbon-based nanofibers (PMS)/Co@C-NCNFs-900) through the synergistic effect of H 2 O 2 and peroxymonosulfate. This carbon-based catalyst achieved 90.67% H 2 O 2 selectivity in 2e-ORR, and also a degradation efficiency of 99.63% for levofloxacin during the 2e-ORR process.…”

Section: Introductionmentioning

confidence: 99%

Defect Engineering of 2D Copper Tin Composite Nanosheets Realizing Promoted Electrosynthesis Performance of Hydrogen Peroxide

Qian,

Liu,

Jiang

et al. 2023

Small

View full text Add to dashboard Cite

The transformation of the two‐electron oxygen reduction reaction (2e‐ORR) to produce hydrogen peroxide (H2O2) is a promising green synthesis approach that can replace the high‐energy consumption anthraquinone process. However, designing and fabricating low‐cost, non‐precious metal electrocatalysts for 2e‐ORR remains a challenge. In this study, a method of combining complexation precipitation and thermal treatment to synthesize 2D copper‐tin composite nanosheets to serve as the 2e‐ORR electrocatalysts is utilized, achieving a high H2O2 selectivity of 92.8% in 0.1 m KOH, and a bulk H2O2 electrosynthesis yield of 1436 mmol·gcat−1·h−1 using a flow cell device. Remarkably, the H2O2 selectivity of this catalyst decreases by only 0.5% after 10,000 cyclic voltammetry (CV) cycles. In addition, it demonstrates that the same catalyst can achieve 97% removal of the organic pollutant methyl blue in an aqueous system solution within 1 h using the on‐site degradation technology. A reasonable control of defect concentration on the 2D copper‐tin composite nanosheets that can effectively improve the electrocatalytic performance is found. Density functional theory calculations confirm that the surface of the 2D copper‐tin composite nanosheets is conducive to the adsorption of the key intermediate OOH*, highlighting its excellent electrocatalytic performance for ORR with high H2O2 selectivity.

show abstract

Porous carbon monoliths for electrochemical removal of aqueous herbicides by “one-stop” catalysis of oxygen reduction and H2O2 activation

Cited by 13 publications

References 56 publications

Molecular-Level Tuning of Active Sites of the Carbonaceous Catalyst for Boosting Electrochemical H₂O₂ Production and its Application in Electro-Fenton-like Degradation of Organics

Molecular-Level Tuning of Active Sites of the Carbonaceous Catalyst for Boosting Electrochemical H₂O₂ Production and its Application in Electro-Fenton-like Degradation of Organics

Modeling Wet Air Oxidation of Sodium Acetate in a Bubble Column

Defect Engineering of 2D Copper Tin Composite Nanosheets Realizing Promoted Electrosynthesis Performance of Hydrogen Peroxide

Contact Info

Product

Resources

About

Porous carbon monoliths for electrochemical removal of aqueous herbicides by “one-stop” catalysis of oxygen reduction and H2O2 activation

Cited by 13 publications

References 56 publications

Molecular-Level Tuning of Active Sites of the Carbonaceous Catalyst for Boosting Electrochemical H2O2 Production and its Application in Electro-Fenton-like Degradation of Organics

Molecular-Level Tuning of Active Sites of the Carbonaceous Catalyst for Boosting Electrochemical H2O2 Production and its Application in Electro-Fenton-like Degradation of Organics

Modeling Wet Air Oxidation of Sodium Acetate in a Bubble Column

Defect Engineering of 2D Copper Tin Composite Nanosheets Realizing Promoted Electrosynthesis Performance of Hydrogen Peroxide

Contact Info

Product

Resources

About

Molecular-Level Tuning of Active Sites of the Carbonaceous Catalyst for Boosting Electrochemical H₂O₂ Production and its Application in Electro-Fenton-like Degradation of Organics

Molecular-Level Tuning of Active Sites of the Carbonaceous Catalyst for Boosting Electrochemical H₂O₂ Production and its Application in Electro-Fenton-like Degradation of Organics