CHEMICAL ENGINEERING JOURNAL
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2021
·
IF 13.273
Zhou Yang,Meng Xiang,Yunfeng Zhu,Jia Hui,Yong Jiang,Shuang Dong,Chengbin Yu,Junfei Ou,Hengfei Qin
Pt/C is a practical electrocatalyst for oxygen reduction reaction (ORR) in metal-air batteries and fuel cells, however, also suffers the drawbacks of high cost and instability, which have propelled people to search for new substitutes, such as single-atom metal electrocatalysts. Herein, C 4 N was firstly synthesized from 2,3-diyldiamine phenazine via one-step hydrothermal method rather than the traditional way that two monomers react in organic solvent, and then loaded with single-atom metal (Pt or Ru) to form new electrocatalysts. The so-formed M@C 4 N (M = Pt or Ru) electrocatalysts show more excellent ORR performances with higher half-wave potential and better stability and methanol tolerance as compared with the commercial Pt/C. Specifically, the half-wave potential of 1%Pt@C 4 N and 0.5%Ru@C 4 N is 0.861 V and 0.828 V, respectively. Density functional theory calculations reveal that 1%Pt@C 4 N has stronger adsorption of reactant species and faster kinetics than 0.5%Ru@C 4 N in ORR pathway.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS LETTERS
·
2024
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IF 2.7
Hongwei Niu,Jia Hui,Zhou Yang,Hengfei Qin
It is an important task for designing a facile bifunctional electrocatalyst that is applied to a zinc-air battery (ZAB). Herein, the 2D C 4 N is synthesized by hydrothermal method, and ultralow noble metal palladium (Pd) is doped into the C 4 N to form Pd-C 4 N. The Pd-C 4 N has a low Δ E of 0.76 V in 0.1 M KOH, which is a good candidate as the bifunctional electrocatalyst for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) in the ZABs. This work provides a design idea of modified carbon-based material for bifunctional electrocatalysts.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Catalysts
·
2026
·Vol. 16
·期 8
·696
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IF 4.5
Zhenhua Cai,Kexin Zhu,Dongwei Sun,Zhihui Li,Xiangyu Wang,Zihan Li,Hua Jiang,Fuping Zeng
Sulfur hexafluoride (SF6) serves as an essential insulating and arc-extinguishing medium in power facilities, while it is an extremely potent greenhouse gas with an ultra-long atmospheric lifetime. To realize efficient medium-temperature harmless disposal of waste SF6, two-dimensional stable C4N monolayers were adopted as substrates to load ZnO and CuO nanoparticles for composite catalyst fabrication. XRD, TEM, and EDS characterizations confirmed the uniform dispersion of the metal oxides without destroying the C4N two-dimensional skeleton. Comparative experiments proved that an NH3reducing atmosphere significantly accelerates SF6decomposition. The 3:1 CuO-modified catalyst achieved a maximum SF6conversion of 91%, and a CaO additive effectively restrained high-temperature sintering and irreversible HF halogen poisoning, boosting overall catalytic efficiency by approximately 30%. DFT adsorption simulations revealed totally different active centers: hollow sites dominate ZnO-C4N with broad adsorption capacity for SO2, SO2F2, and other fluorinated intermediates, whereas surface O sites of CuO-C4N exhibit exclusive strong chemisorption toward SO2. Combined with macroscopic kinetics and atomic-scale interfacial interaction rules, their distinct stepwise defluorination pathways were illustrated. This study offers solid experimental data and microscopic theoretical guidance for designing advanced C4N-based catalysts for waste SF6abatement.
✓ 已验证
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
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2026
·
IF 2.6
Ying Cui,Yang Liu,Zhao-Di Yang,Yu Zhang,Yingchao Lai,Hong Yan,Oxana P. Taran
A new type of highly efficient ternary rGO/COF-C4N/NH2-Bi2O3 heterojunctions was designed and synthesized by solvothermal and ultrasonic methods, and was applied to photocatalytic degradation of chlorophenol in water. The results show that the photocatalytic activity and stability of rGO/COF-C4N/NH2-Bi2O3 for the degradation of o-chlorophenol (2-cp) was significantly increased as compared with that of pure Bi2O3, COF-C4N, and COF-C4N/NH2-Bi2O3. The photocatalytic degradation rate for 2-cp by rGO/COF-C4N/NH2-Bi2O3-5% get to 83.7% and 97.4%, and the highest degradation rate constants are 0.0072 min⁻¹ and 0.0158 min⁻¹ under visible light and full light, respectively. The ternary photocatalyst rGO/COF-C4N/NH2-Bi2O3-5% maintained its performance even after four consecutive cycles, only decreasing by 5% of its degradation rate. The degradation experiments for other chlorophenols pollutants under visible light displayed that this ternary heterojunction is mainly applicable to the degradation of 2-cp and 2, 4-dcp, but inefficient for cp, 3-cp, and 4-cp. The degradation rates of 2, 4-dcp could reach 85.1% under visible light. Based on the analysis of band structure, free radical trapping experiment and photoelectrochemical properties, the photocatalytic degradation mechanism of chlorophenols by type II rGO/COF-C4N/NH2-Bi2O3 heterojunction was proposed, in which h+ and ∙OH- have main influence on the degradation activity, and the rGO plays an important role in improving the charge transfer and separation. This work provides a choice for the effective removal of chlorophenols wastewater by photocatalysis
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DOI
高影响因子
Nano-Micro Letters
·
2025
·Vol. 17
·期 1
·1-17
·
IF 36.3
Li Mengxiao,Li Rui,Ma Huige,Yang Mingsheng,Dai Yujie,Yu HaiPing,Hao Yuxin,Wang Zhihui,Wang Bei,Hu Mingjun,Yang Jun
An integrated conjugated microporous polymer composite electrode (C 4 N/rGO) with high conductivity, large specific surface area and good solvent resistance was prepared by in-situ growth.
An antifreeze alkaline electrolyte (0.1 DMSO/2 M NaOH) was developed to broaden the operation temperature zone and voltage window of the aqueous alkaline battery.
The prepared aqueous alkaline battery exhibits a high energy density (147.3 Wh Kg −1 at 25 °C), outstanding long cycling stability and excellent wide-temperature-range performance (−70 to 45 °C).
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）