Preparation and supercapacitor performance of NiO/CuO-0.3/GO-30 nanoplates

Xie, Huidong; Li, Jie; Chen, Cheng; Dang, Fangfang; He, Yingying

doi:10.1016/j.matlet.2020.128887

Cited by 6 publications

(2 citation statements)

References 16 publications

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“…[23] Compared with pure CeO 2 , With the increase of copper content and the decrease of the content of CeÀ ZrÀ O solid solution, the peaks of Pt 0.01 Cu x Ce (1-x)/ 2 Zr (1-x)/2 O y samples at 463 cm À 1 became weaker and wider, indicating that a large amount of CuÀ CeÀ ZrÀ O solid solution was formed with the increase of copper content. [24] At approximately 290 cm À 1 and 632 cm À 1 , two bands appeared respectively for the displacement of oxygen atoms from its ideal fluorite lattice position and the non-degenerate longitudinal optical mode of cerium oxide, [25] which was owing to the replacement of Ce 4 + with Zr 4 + . The ratio of the two peaks at 632 cm À 1 (denoted as A 632 ) and 463 cm À 1 (denoted as A 463 ) can indicate the relative oxygen vacancy position.…”

Section: Catalyst Characterizationmentioning

confidence: 99%

Cu‐Promoted Pt/Ce_0.5Zr_0.5O_x Catalyst for Ammonia Production Reaction of Passive SCR from Nitric Oxide and Hydrogen

et al. 2022

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In response to stricter emission regulations, lean-burn engines have attracted more and more attention. However, lean burn engines would inevitably lead to the increase in NO x emissions. The researchers combined Three-Way Catalyst (TWC) and Selective Catalytic Reduction (SCR) to propose "passive SCR", which makes the engine periodically switch between rich and lean burn. During rich combustion, ammonia is produced by the TWC catalyst, stored in the downstream SCR, and reacts with NO x during lean combustion, in which increasing the ammonia yield on the TWC catalyst is the key. In this study, the self-propagating high-temperature synthesis method was used to modify the catalyst by adding copper to improve the ammonia production efficiency. The conversion rate of catalysts with different copper doping ratios from NO to ammonia was measured. Through XRD, BET, H 2 -TPR, TEM, HRTEM, XPS, in-situ DRIFTS, etc., the improvement mechanism of copper doping was analysed. The results showed that Pt 0.01 Cu 0.1 Ce 0.45 Zr 0.45 O x had the highest catalytic activity, the widest reaction temperature window (300-550 °C) with the conversion greater than 96 %. The characterization results showed that appropriate amount of copper doping can adjust the valence distribution, form more oxygen vacancies, and improve the distribution of active species. The in-situ DRIFTS further demonstrated that the conversion from bridged to monodentate and bidentate nitrate may be the key factors on the catalyst surface.

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Section: Catalyst Characterizationmentioning

confidence: 99%

Cu‐Promoted Pt/Ce_0.5Zr_0.5O_x Catalyst for Ammonia Production Reaction of Passive SCR from Nitric Oxide and Hydrogen

et al. 2022

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“…122 However, poor ionic conductivity and low electrically active sites restrict its use as a supercapacitor electrode material. 146,147 To mitigate these problems, different morphology of NiO nanostructures such as nanobelts, nanowires, nanorods, and nanoflowers have been synthesized. The electrochemical performance of NiO nanobelts decorated with gold (Au) nanoparticles were synthesized by Tan et al 148 Ni(OH) 2 powder, DI water, and HAuCl 4 were mixed and treated ultrasonically for 30 min.…”

Section: D Transition Metal Oxides (Tmos) and Transition Metalmentioning

confidence: 99%

Review—The Synthesis and Characterization of Recent Two-Dimensional Materials for Energy Storage Applications

Nehate¹,

Sundaresh²,

Saikumar³

et al. 2022

ECS J. Solid State Sci. Technol.

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The ever-increasing energy consumption has been projected to burden renewable energy sources. It is imperative to look for high-performance clean energy storage systems to sustain future energy demands. Among all the environmentally friendly and efficient energy storage options, supercapacitors are one of the most researched devices. Supercapacitors possess excellent electrochemical properties such as high-power density, superior cyclic stability, fast charging-discharging rates, and high specific capacitance that makes them a fascinating candidate. To improve the energy storage capacity, the two-dimensional counterpart of the supercapacitors is being investigated extensively and manifested unique electrochemical properties. This article thoroughly summarizes the synthesis and characterization techniques adopted for the most recent two-dimensional supercapacitor electrode materials. We focus on the family of carbon-based materials, transition metal oxides and hydroxides, MXenes, and transition metal dichalcogenides that can be employed for clean energy storage applications. The performance of these materials is discussed and compared based on their synthesis technique.

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Effect of graphene residual carbon content on electrochemical properties of NiS/GR composites

Yang

Huang

Wei

2021

J Mater Sci: Mater Electron

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Preparation and supercapacitor performance of NiO/CuO-0.3/GO-30 nanoplates

Cited by 6 publications

References 16 publications

Cu‐Promoted Pt/Ce_0.5Zr_0.5O_x Catalyst for Ammonia Production Reaction of Passive SCR from Nitric Oxide and Hydrogen

Cu‐Promoted Pt/Ce_0.5Zr_0.5O_x Catalyst for Ammonia Production Reaction of Passive SCR from Nitric Oxide and Hydrogen

Review—The Synthesis and Characterization of Recent Two-Dimensional Materials for Energy Storage Applications

Effect of graphene residual carbon content on electrochemical properties of NiS/GR composites

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Preparation and supercapacitor performance of NiO/CuO-0.3/GO-30 nanoplates

Cited by 6 publications

References 16 publications

Cu‐Promoted Pt/Ce0.5Zr0.5Ox Catalyst for Ammonia Production Reaction of Passive SCR from Nitric Oxide and Hydrogen

Cu‐Promoted Pt/Ce0.5Zr0.5Ox Catalyst for Ammonia Production Reaction of Passive SCR from Nitric Oxide and Hydrogen

Review—The Synthesis and Characterization of Recent Two-Dimensional Materials for Energy Storage Applications

Effect of graphene residual carbon content on electrochemical properties of NiS/GR composites

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Product

Resources

About

Cu‐Promoted Pt/Ce_0.5Zr_0.5O_x Catalyst for Ammonia Production Reaction of Passive SCR from Nitric Oxide and Hydrogen

Cu‐Promoted Pt/Ce_0.5Zr_0.5O_x Catalyst for Ammonia Production Reaction of Passive SCR from Nitric Oxide and Hydrogen