3D‐foam‐structured nitrogen‐doped graphene‐Ni catalyst for highly efficient nitrobenzene reduction

Wang, Zhiyong; Pu, Yuan; Wang, Dan; Shi, Jie; Wang, Jie‐Xin; Chen, Jianfeng

doi:10.1002/aic.16016

Cited by 18 publications

(3 citation statements)

References 44 publications

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“…CV tests were performed over the potential window from −1.0 to 1.0 V. The data for N-RGO-5 (figure 8(a)) show a good approximately rectangular shape. There is no obvious peak tip compared with the trends for the other samples, indicating that N-RGO-5 exhibited the properties of an ideal double-layer capacitor [43]. N-RGO-5 exhibited the largest specific capacitance among the examined samples, as shown by the large area under the current-voltage curve.…”

Section: Electrochemical Measurementsmentioning

confidence: 86%

3D nitrogen-doped graphene created by the secondary intercalation of ethanol with enhanced specific capacity

Gao

et al. 2021

Nanotechnology

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Here, we report an improved synthesis strategy for 3D nitrogen-doped graphene to increase the specific capacity of supercapacitors. Ethanol replaces the strong oxidant hydrogen peroxide in the improved Hummers method, and the loose porous structure is conducive to charge transfer. N-doped porous 3D graphene was synthesized from RGO-C prepared by ethanol secondary intercalation modification of functional groups. Ammonia was selected as the dopant; the microstructure and electrochemical performance of samples synthesized at different temperatures were examined. The results demonstrate that the 3D nitrogen-doped graphene (N-RGO-5) had a layered tuple shape with a sheet thickness of 0.612 nm.The specific surface area of the 3D N-RGO-5, which was prepared at 190°C, was 258.371 m2 g−1, which was higher than that (5.877 m2 g−1) of the original graphite. The 3D N-RGO-5 exhibited a specific capacitance of 236 F g−1 and an energy density of 32.78 Wh kg−1 at a current density of 1 A g−1, which is 27% higher than the specific capacitance of RGO. The 3D N-RGO-5 demonstrated an excellent capacity retention rate of 93.6% after 5000 cycles at a current density of 1 A g−1. This study demonstrates that the unique 3D structure and N-doping of N-RGO considerably improved the overall energy storage performance of graphene-based nanomaterials.

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Section: Electrochemical Measurementsmentioning

confidence: 86%

3D nitrogen-doped graphene created by the secondary intercalation of ethanol with enhanced specific capacity

Gao

et al. 2021

Nanotechnology

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“…Single non-noble-metal catalysts often lack catalytic activity due to their tightly stacked structure and inactivity. Many studies have shown that loading non-noble metals on a specific carrier to increase the surface exposure can improve the catalytic activity for 4-NP reduction to some extent. ,− Conventional strategies for loading non-noble-metal nanoparticles (nNMNPs) onto a support (metal–organic framework, covalent organic frameworks, graphene support, etc.) are often based on physical pre-preparing loading.…”

Section: Introductionmentioning

confidence: 99%

Transformation from 3D Boron Organic Polymers to 1D Nanorod Arrays: Loading Highly Dispersed Nanometal for Green Catalysis

Zhao¹,

Xiang²,

Zhang³

et al. 2019

ACS Appl. Mater. Interfaces

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The increasing global demands for eco-friendly and low-cost catalysts have propelled the advent of nanosized non-noble-metal catalysts to replace traditional noble metals. In this work, ultrafine NiO nanoparticles were prepared rapidly in situ by the strategy of transforming three-dimensional (3D) metal boron organic polymers (BOPs@Ni2+) to one-dimensional (1D) boron organic polymers (BOPs@Ni) nanorod arrays at room temperature. The 3D BOPs@Ni2+ can be quickly obtained by the interaction of 4,4′-bipyridine with Ni2+ and dodecaborate (B12H12 2–) in an aqueous solution. When Ni2+ is converted into NiO in situ, 1D BOPs@Ni nanostructure transformation from the 3D BOPs@Ni2+ framework was achieved due to the B–H···π interaction between B12H12 2– and 4,4′-bipyridine. Furthermore, BOPs@Ni exhibits high catalytic activity and rapid kinetics in the conversion of 4-nitrophenol to 4-aminophenol, and the high stability of 1D nanorod arrays guarantees the catalytic activity of BOP@Ni to barely change under recycling for at least 10 times. BOPs@Ni also exhibits good catalytic performance and high selectivity characteristics in the catalytic reduction of a series of nitrobenzene derivatives. This strategy of using BOPs@Ni2+ for loading self-supporting nanometal not only exhibits a highly efficient catalytic hydrogenation of nitrobenzene and its derivative but also provides an effective technical route for designing self-supported nanometal materials.

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“…根据不同的模型选择以及理论计算, 发现带负 [39] 前期研究发现使用镍泡沫的旋转泡沫反应器与金属丝网结构相比, 可以将微观混合时间缩短30%, 极大强化液固相传质. 在此基础上, 本课题组 [40] [40] Figure 5 (Color online) NG/NF catalyst. (a) UV/Vis spectra of the reaction solution during catalysis by NG/NF; (b) catalyst recycling performance; (c), (d) schematic diagram of L-H model [40] 表 1 非金属碳基材料在液相催化反应中的应用 2.2 工业气相催化反应工业生产中的气相催化反应大多数都需要在高温高压下进行 [41] , 多年来德国马普学会Fritz-Harber 研究所、中国科学院沈阳金属研究所苏党生课题组 [42] 围绕非金属碳基纳米催化材料在气相氧化脱氢反应体系的应用开展了系列研究.…”

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Recent advances in metal-free carbon-based nanocatalysts

Wang

et al. 2018

Chin. Sci. Bull.

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Carbon-nitrogen/graphene composite as metal-free electrocatalyst for the oxygen reduction reaction Chinese Science Bulletin 56, 3583 (2011); Enhancing the photoelectrocatalytic performance of metal-free graphdiyne-based catalyst SCIENCE CHINA Chemistry 63, 1040 (2020); Metal-free porous nitrogen-doped carbon nanotubes for enhanced oxygen reduction and evolution reactions Science Bulletin 61, 889 (2016); Probing the intrinsic catalytic activity of carbon nanotubes for the metal-free oxidation of aromatic thiophene compounds in ionic liquids

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3D‐foam‐structured nitrogen‐doped graphene‐Ni catalyst for highly efficient nitrobenzene reduction

Cited by 18 publications

References 44 publications

3D nitrogen-doped graphene created by the secondary intercalation of ethanol with enhanced specific capacity

3D nitrogen-doped graphene created by the secondary intercalation of ethanol with enhanced specific capacity

Transformation from 3D Boron Organic Polymers to 1D Nanorod Arrays: Loading Highly Dispersed Nanometal for Green Catalysis

Recent advances in metal-free carbon-based nanocatalysts

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