Preparation of graphene supported nickel nanoparticles and their application to methanol electrooxidation in alkaline medium

Zhang, Lingrong; Zhao, Jianwei; Li, Meng; Ni, Haitao; Zhang, Jinlei; Feng, Xiang; Ma, Yanwen; Fan, Quli; Wang, Xi-Zhang; Hu, Zheng; Huang, Wei

doi:10.1039/c2nj20690k

Cited by 55 publications

(27 citation statements)

References 39 publications

(48 reference statements)

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“…In addition, the catalytic activity of hybrid GO/Co 3 O 4 racks is around threefold higher than that of single Co 3 O 4 racks structure. Significantly, the analyzed oxidation currents of as‐obtained GO/Co 3 O 4 racks outperform those of previously reported . More importantly, the onset potential is an important issue to well evaluate the electrocatalytic activity of an electrocatalyst for methanol or ethanol oxidation reaction.…”

Section: Electrocatalytic Activity Of Sheet Racks and Blocks For Methmentioning

confidence: 77%

Mesoscopic Fabric Sheet Racks and Blocks as Catalysts with Efficiently Exposed Surfaces for Methanol and Ethanol Electrooxidation

Shenashen

Hassen

El‐Safty

et al. 2016

Adv Materials Inter

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Electrode designs based on sheet racks and blocks w ith multi-diffuse groove spaces and enriched active sites and scales would promote the commercial applications of electroactive materials. We report a facile one-pot hydrothermal approach to synthesize mesoscopic porous Co 3 O 4 or hybrid graphene (GO)/Co 3 O 4 sheet-on-sheet racks and blocks. Three basic types of sheet scalability racks can be built in vertical and non-stacked edge orientations, such as neat micro/nano-groove rooms, butterfly wing scales, and wall groves, leading to highly exposed surface converges and sites. In particular, the stacked S-GO/Co 3 O 4 sheet-on-sheet blocks can be oriented in vertical tower buildings. The atomic structures of the developed Co 3 O 4 catalysts were dominant along the highly dense {112/111} interfaces and single crystal {111} and {112} facets. The electrochemical performance of the mesoscopic porous Co 3 O 4 catalyst toward alcohol electrooxidation was evaluated in alkaline conditions. The mesoscopic hybrid GO/Co 3 O 4 racks revealed superior catalytic activity in terms of oxidation currents and onset potentials, indicating the effect of the synergetic role of active Co 3+ sites along the densely exposed {112} facets, graphene counterparts, and hierarchically non-stacked sheet racks on the electroactive functionality. Results indicate that the mesoscopic GO/Co 3 O 4 sheet catalyst is suitable for highly efficient electrochemical reactions.

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Section: Electrocatalytic Activity Of Sheet Racks and Blocks For Methmentioning

confidence: 77%

Mesoscopic Fabric Sheet Racks and Blocks as Catalysts with Efficiently Exposed Surfaces for Methanol and Ethanol Electrooxidation

Shenashen

Hassen

El‐Safty

et al. 2016

Adv Materials Inter

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“…It can be seen that the GF showed insignificant current response compared with the GF/Ag. The weak redox couple observed on the GF is presumably due to the Ni 2+ /Ni 3+ redox process arising from the nickel impurities during the etching process [42]. The well-defined redox process on the GF/Ag is related to the one-electron process of the Ag nanoparticles, the anodic current at the peak potential of 0.4 V (oxidation of Ag 2+ to Ag 3+ ) and the cathodic current at the peak potential of 0.2 V (reduction of Ag 3+ back to Ag 2+ ) [12].…”

Section: Resultsmentioning

confidence: 99%

Silver nanoparticles decorated on a three-dimensional graphene scaffold for electrochemical applications

Bello

Fabiane

Dodoo‐Arhin

et al. 2014

Journal of Physics and Chemistry of Solids

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Silver metal nanoparticles were decorated by electron beam evaporation on graphene foam (GF) grown by chemical vapour deposition. X-ray diffraction, Raman spectroscopy, scanning and transmission electron microscopy, and atomic force microscopy were used to investigate the structure and morphology of the graphene foam/silver nanoparticles (GF/Ag). Both samples were tested as electrodes for supercapacitors. The GF/Ag exhibited a significantly higher capacitive performance, including a specific capacitance value of (~110 Fg -1 ) and excellent cyclability in a three-electrode electrochemical cell. These results demonstrate that graphene foam could be an excellent platform for metal particles for investigating improved electrochemical performance.

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“…15 As low-cost and non-noble metal materials, nickel based catalysts with good surface catalytic oxidation activities in alkaline electrolyte have been the subject of much investigation. 16,17 Kannan et al prepared NiMoO 4 nanorods with graphene by a facile hydrothermal process for methanol oxidation, and arising from the unique one dimensional structure and well distributed carbon, enhanced catalytic activity and high stability were obtained. 18 Co 3 O 4 /NiO nanowire arrays with hierarchically porous core and branch nanoakes shell was prepared for methanol oxidation and the electrode showed lower over-potential, high reactivity and stability in the electrocatalytic tests which was attributed to the synergistic effect and core-shell structure.…”

Section: Introductionmentioning

confidence: 99%

Nickel nanoparticles supported on nitrogen-doped honeycomb-like carbon frameworks for effective methanol oxidation

et al. 2017

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Preparation of graphene supported nickel nanoparticles and their application to methanol electrooxidation in alkaline medium

Cited by 55 publications

References 39 publications

Mesoscopic Fabric Sheet Racks and Blocks as Catalysts with Efficiently Exposed Surfaces for Methanol and Ethanol Electrooxidation

Mesoscopic Fabric Sheet Racks and Blocks as Catalysts with Efficiently Exposed Surfaces for Methanol and Ethanol Electrooxidation

Silver nanoparticles decorated on a three-dimensional graphene scaffold for electrochemical applications

Nickel nanoparticles supported on nitrogen-doped honeycomb-like carbon frameworks for effective methanol oxidation

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