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| 1 | Porous Nitrogen-doped Reduced Graphene Oxide Gels as Efficient Su-percapacitor Electrodes and Oxygen Reduction Reaction Electrocatalysts显示文摘Summary of main observation and conclusion Heteroatom-doped carbon materials have been widely used in energy storage and conversion such as supercapacitors and electrocatalysts.In this work,L-asparagine(Asn),an amino acid derivative,has been used as a doping agent to prepare nitrogen-doped reduced graphene oxide gels(N-GAs).The 3D interconnected structure gives rise to the superior electrochemical properties for supercapacitor and electrocatalytic oxygen reduction reaction(ORR).The N-GA-4(the mass ratio of Asn to graphene oxide(GO)is 4:1 by hydrothermal method)electrode shows the capacitance of 291.6 F.g 1 at 0.5 Ag。Meanwhile,the assembled symmetric supercapacitor achieves a maximum energy density of 23.8 Wh.kg when the power density is 451.2 W-kg,and demonstrates an ultralong cycling life that the retention of capacitance is 99.3%after 80000 cycles.What's more,the annealed aerogel N-GA-4.900 exhibits an onset potential(Eonse)of 0.95 V,half wave potential(Eyz)of 0.84 V(vs.RHE)and the oxygen reduction current density of 5.5 mA.cm2 at 0.1 V with nearly four-electron transfer,which are superior to commercial Pt/C.This work offers a new insight into the synthesis and applications of N-GAS materials towards high performance in supercapacitors and ORR. | Liu Yang Tao Wang Dongling Wu | 2020 | Chinese Journal of Chemistry2020，38，10： | 3 |
| 2 | Stacking of Exfoliated Two-Dimensional Materials: A Review显示文摘In recent years,two-dimensfonal(2D)atomic crystals represented by graphene have opened up new fields of 2D physics.Layered materials with atomic layer thickness are self-assembled into van der Waals heterostructures by weak van der Waals forces without considering lattice matching.Van der Waals heterostructures can not only enhance the performance of its constituent materials but also show new characteristics.High-quality heterostructures require mechanically cleaved intrinsic 2D materials and flexible 2D material stacking techniques.Here,we summarize in detail the reliable exfoliation methods for large-area single-layer 2D materials and the dry and wet stacking techniques with high success rates.The twisted bilayer graphene is used as an example to briefly introduce the single-crystal tearing method,which is currently the most practical method for preparing isotropic twisted heterostructures with high-precision rotation angles.We hope to provide a valuable reference for researchers of 2D materials. | Zhen Hu Zhi-Bo Liu Jian-Guo Tian | 2020 | Chinese Journal of Chemistry2020，38，9： | 3 |
| 3 | Electrocatalytic Hydrogenation and Oxidation in Aqueous Conditions显示文摘Water molecule contains one oxygen and two hydrogen atoms,making it a potential oxygen and hydrogen source.Electrocatalytic organic reduction and oxidation using water as oxygen and/or hydrogen donors provide an environmentally friendly and sustainable strategy to replace traditional chemical-driven stoichiometric reactions that use sacrificial reagents.Furthermore,the development of electrochemical synthesis provides a potential application for low tension photoelectricity,which is not cost-effective during boosted voltage and application.In the last decade,electrocatalytic redox reactions of organic molecules in aqueous media had shown progress owing to the development of electrode materials and water-splitting technology.This paper highlights several electrocatalytic systems and corresponding mechanisms for both hydrogenation and oxidative transformation of representative compounds.The activation process of protons and water on the working electrode surface has received special focus.Furthermore,paired electrolysis using water as the oxygen and hydrogen source has been demonstrated.This paired system combines hydrogenation and oxidation half-reactions in one cell using water as the hydrogen and oxygen source,resulting in high atomic and electron utilization rates. | Peili Zhang Licheng Sun | 2020 | Chinese Journal of Chemistry2020，38，9： | 3 |
| 4 | Carbon Dots Promote the Performance of Anodized Nickel Passivation Film on Ethanol Oxidation by Enhancing Oxidation of the Intermediate显示文摘Ethanol is considered a better fuel than methanol in direct alcohol fuel cells because of the high energy density and low toxicity.Compared with noble metal catalysts,nickel-based catalysts are much cheaper in price.However,present nickel-based catalysts still surfer from some disadvantages such as low activity and high overpotential.In this paper;we show a new and high efficient nickel-based catalyst for ethanol oxidation.A layer of anodized nickel passivation film(Ni-APF)was formed on the surface of nickel sheet by anodic oxidation method with carbon dots(CDs)as co-catalyst.At the current density of 110 mA·cm^(-2),the potential for Ni-APF/CDs was only 0.541 V(vs.Ag/AgCI),which was 18.8% lower than that of Ni-APF.Low overpotential could reduce electrode thermal loss and increase output energy.Ni-APF/CDs showed 144.4 mA·cm^(-2) peak current density at peak potential 0.662 V(vs.Ag/AgCI),which was 31% higher than that of Ni-APF(110.3 mA·cm^(-2)).In this system,CDs mainly function in the increase of charge-transfer capacity and the promotion oxidation of carbonaceous intermediates. | Yandi Shi Fan Liao Wenxiang Zhu Huixian Shi Kui Yin Mingwang Shao | 2021 | Chinese Journal of Chemistry2021，39，5： | 0 |
| 5 | Construction and Application of Interfacial Inorganic Nanostructures显示文摘Interfacial nanostructured materials have stimulated extensive interests in the research areas of green energy production and conversion due to their unique structures and performance.These interfacial crystalline structures with rich intrinsic defects,such as oxygen vacancies,adatoms,grain bounda-ries,and substitutional impurities,have led to unique activities in a variety of catalytic reactions.The rational design and engineering development of the interfaces provide an attractive way to optimize the catalytic performance and finally improve the efficiency of energy conversion and storage.Herein,a comprehensive overview of interfacial inorganic nanostructures and their electrocatalytic applications are summarized,and some future challenge and opportunity have also been proposed. | Rui Wang Yicheng Wei Li An Rui Yang Linchuan Guo Zheng Weng Pengfei Da Wenqing Chen Jing Jin Jianyi Li Pinxian Xi | 2020 | Chinese Journal of Chemistry2020，38，7： | 0 |
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