Nickel-catalyzed formation of mesoporous carbon structure promoted capacitive performance of exhausted biochar

Li, Deping; Zhao, Ling; Cao, Xinde; Xiao, Ziyue; Nan, Haiyan; Qiu, Hao

doi:10.1016/j.cej.2020.126856

Cited by 22 publications

(6 citation statements)

References 52 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The newly formed oxygen-containing functional groups can benefit the N doping process due to the low bond energy of COC and CO bonds compared with the CC bond; therefore, they can be more easily broken during hydrothermal treatment and further absorb the N dopant . Also, they can help metal oxide nanoparticles deposit on O-CNF by absorbing metal ions on its surface . Both N doping and metal oxides can create active sites of ORR. , Next, the XRD patterns of MnO/Mn 2 O 3 /NCNF and MnO/Mn 2 O 3 /ONCNF- n are obtained, as shown in Figure a.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Plasma-Assisted Synthesis of Defect-Rich O and N Codoped Carbon Nanofibers Loaded with Manganese Oxides as an Efficient Oxygen Reduction Electrocatalyst for Aluminum–Air Batteries

Cheng

Wang

Jiang

et al. 2021

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

The oxygen reduction reaction (ORR) with sluggish kinetics on the cathode of aluminum–air (Al–air) batteries greatly limits their further development. Here, a new strategy is proposed to synthesize oxygen and nitrogen codoped carbon nanofibers loaded with manganese oxides (MnO/Mn2O3/ONCNF-n) as an efficient electrocatalyst for ORR by using oxygen plasma surface etching. The MnO/Mn2O3/ONCNF-3 exhibit superior ORR performance in an alkaline electrolyte, which is attributed to various active sites including N and O heteroatoms, vacancies, and manganese oxides. Additionally, the fabricated homemade Al–air battery (AAB) with MnO/Mn2O3/ONCNF-3 exhibits a maximum power density of 129.7 mW cm–2, demonstrating comparable performance to AABs based on the commercial Pt/C catalyst. This work provides a new approach of using O2 plasma for enhancing the ORR catalytic activities of carbon materials.

show abstract

Section: Resultsmentioning

confidence: 99%

“…41 Also, they can help metal oxide nanoparticles deposit on O-CNF by absorbing metal ions on its surface. 42 Both N doping and metal oxides can create active sites of ORR. 22,43 Next, the XRD patterns of MnO/Mn 2 O 3 /NCNF and MnO/Mn 2 O 3 / ONCNF-n are obtained, as shown in Figure 2a.…”

Section: Resultsmentioning

confidence: 99%

Plasma-Assisted Synthesis of Defect-Rich O and N Codoped Carbon Nanofibers Loaded with Manganese Oxides as an Efficient Oxygen Reduction Electrocatalyst for Aluminum–Air Batteries

Cheng

Wang

Jiang

et al. 2021

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

show abstract

“…At the intersection of the high-frequency region and the real axis corresponds to the ohmic impedance ( R ohm ), which is 133 mΩ for the Raney-Ni electrode and 291 mΩ for the N–Ni/C-4 electrode. ,, This could be attributed to the Raney-Ni electrode having a nickel loading more than five times higher than that of the N–Ni/C-4 electrode. The diameter of the arc corresponds to the charge transfer impedance ( R ct ) of the electrode, with values of 1673 mΩ and 850 mΩ for the Raney-Ni and N–Ni/C-4 electrodes, respectively. − The difference in charge transfer impedance suggests that the N–Ni/C-4 electrode exhibits higher catalytic activity compared to that of the Raney-Ni electrode. Comparing the structural changes of the N–Ni/C-4 electrode after 30 and 300 cycles (see Figure S14), the R ohm values of the electrode after 30 and 300 cycles are 280 mΩ and 291 mΩ, respectively, and the R ct values are 872 mΩ and 886 mΩ, respectively.…”

Section: Resultsmentioning

confidence: 99%

Carbon/Nitrogen Co-Modified Nano-Ni Catalyst Endows a High Energy Density and Low Cost Aqueous Ni–H₂ Gas Battery

Ma,

He,

et al. 2024

ACS Appl. Energy Mater.

View full text Add to dashboard Cite

Aqueous hydrogen gas (H 2 ) batteries with high safety and proven long lifespan have shown attractive prospects for large-scale energy storage. However, the development of low-cost and relatively high activity nonprecious metal catalysts for the hydrogen oxidation reaction (HOR) for a hydrogen electrode is the key to solving its cost bottleneck. Here, We have achieved a low-cost and highly active nanonickel hydroxide catalyst through a simple ball-milling method combined with carbon−nitrogen comodification. The experiments indicate that in the presence of carbon modification, nitrogen interacts with carbon to suppress the formation of Ni 3 N, while trace nitrogen modification on nickel significantly enhances hydroxide activity. The optimized N−Ni/C-4 catalyst exhibits intrinsic activity 11.36 times that of Ni/Ni 3 N (without C modification) and 17.85 times that of commercial Raney-Ni. Moreover, based on this N−Ni/C-4 catalytic electrode, superior rate performance is demonstrated in an aqueous nickel−hydrogen gas cell compared to commercial Raney-Ni, achieving 300 cycles/1000 h of charge/discharge at 30 mA cm −2 , with no decline in Coulombic efficiency. This 900 mAh N−Ni/C-4-based Ni−H 2 cell achieves an energy density of 165 Wh kg −1 and is currently reported to be one of the lowest-cost nickel−hydrogen cell. This low-cost, highly active nanonickel catalyst demonstrates significant potential in the conversion and application of hydrogen energy.

show abstract

“…3. two characteristic peaks appear in the Raman spectrum around wavelengths 1329 cm −1 and 1583 cm −1 , D peak appearing around 1300 cm −1 , and G peak appearing around 1580 cm −1 (Li et al 2021). So, they are corresponding to the D and G peaks of graphite, the D peak represents the defect peak, which is caused by the low symmetry or irregularity of the carbon material and corresponds to doping, defects, wobbly bonds, and bent graphite layers in the graphite structure.…”

Section: Characterization Of Materialsmentioning

confidence: 99%

Investigation of the mechanism of phytate-modified biochar-catalyzed persulfate degradation of Ponceau 2R

Cheng

Liang

et al. 2022

Biochar

View full text Add to dashboard Cite

The mechanism of oxidation and degradation effect of phytate-modified biochar catalyzed persulfate on Ponceau 2R was investigated. Chemical-structural properties of phytate-modified biochar, such as surface morphology and surface oxygen-containing functional groups were characterized. The results suggest that modified biochar has better oxidation performance than unmodified biochar, and the modified biochar generated at 500 ℃ pyrolysis temperature can catalyze peroxymonosulfate (PMS) system with high efficiency, in large pH and temperature scope. And the degradation mechanism of Ponceau 2R by biochar-catalyzed PMS generation (BC-PMS) system was researched. It revealed that PBC300 (phytate-modified biochar pyrolyzed at 300 °C), PBC500 (phytate-modified biochar pyrolyzed at 500 °C), and PBC700 (phytate-modified biochar pyrolyzed at 700 °C) may have metaphosphoric acid linked to oxygen atoms and metaphosphoric acid linked in a bridging manner on the surface of biochar, catalyzing the production of hydroxyl radicals by PMS. PBC700 catalyzes the production of singlet oxygen by PMS through its structural defects, and singlet oxygen is the main catalytic product of PBC700.

show abstract

Nickel-catalyzed formation of mesoporous carbon structure promoted capacitive performance of exhausted biochar

Cited by 22 publications

References 52 publications

Plasma-Assisted Synthesis of Defect-Rich O and N Codoped Carbon Nanofibers Loaded with Manganese Oxides as an Efficient Oxygen Reduction Electrocatalyst for Aluminum–Air Batteries

Plasma-Assisted Synthesis of Defect-Rich O and N Codoped Carbon Nanofibers Loaded with Manganese Oxides as an Efficient Oxygen Reduction Electrocatalyst for Aluminum–Air Batteries

Carbon/Nitrogen Co-Modified Nano-Ni Catalyst Endows a High Energy Density and Low Cost Aqueous Ni–H₂ Gas Battery

Investigation of the mechanism of phytate-modified biochar-catalyzed persulfate degradation of Ponceau 2R

Contact Info

Product

Resources

About

Nickel-catalyzed formation of mesoporous carbon structure promoted capacitive performance of exhausted biochar

Cited by 22 publications

References 52 publications

Plasma-Assisted Synthesis of Defect-Rich O and N Codoped Carbon Nanofibers Loaded with Manganese Oxides as an Efficient Oxygen Reduction Electrocatalyst for Aluminum–Air Batteries

Plasma-Assisted Synthesis of Defect-Rich O and N Codoped Carbon Nanofibers Loaded with Manganese Oxides as an Efficient Oxygen Reduction Electrocatalyst for Aluminum–Air Batteries

Carbon/Nitrogen Co-Modified Nano-Ni Catalyst Endows a High Energy Density and Low Cost Aqueous Ni–H2 Gas Battery

Investigation of the mechanism of phytate-modified biochar-catalyzed persulfate degradation of Ponceau 2R

Contact Info

Product

Resources

About

Carbon/Nitrogen Co-Modified Nano-Ni Catalyst Endows a High Energy Density and Low Cost Aqueous Ni–H₂ Gas Battery