Synthesis and characterizations of Ni-NiO nanoparticles on PDDA-modified graphene for oxygen reduction reaction

Yung, Tung-Yuan; Huang, Li-Ying; Chan, Tzu-Yi; Wang, Kuan-Syun; Liu, Tingyu; Chen, Po‐Tuan; Chao, Chi-Yang; Liu, Ling‐Kang

doi:10.1186/1556-276x-9-444

Cited by 72 publications

(32 citation statements)

References 27 publications

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“…For the production of hydrogen, these materials display excellent catalytic behavior during electrocatalytic water splitting for the hydrogen evolution reaction (HER) (Gong et al 2014). Here, Pt is regarded as state-of-the-art material and is often used as a benchmark (Cheng et al 2016;Subbaraman et al 2011;Yin et al 2015); but because of its dearth in nature, other materials are needed (Yung et al 2014). One alternative is Ni/NiO, where theoretical studies have identified active sites on Ni(111) near the interface of NiO that provides HER performance that can be equal or even higher than that of Pt (Pan and Zhou 2018).…”

Section: Introductionmentioning

confidence: 99%

Growth of semi-coherent Ni and NiO dual-phase nanoparticles using hollow cathode sputtering

et al. 2019

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Anisotropic heterogenous Ni/NiO nanoparticles with controlled compositions are grown using a high-power pulsed hollow cathode process. These novel particles can be tuned to consist of single-phase Ni via twophase Ni/NiO to fully oxidized NiO, with a size range of 5-25 nm for individual crystals. A novelty of this approach is the ability to assemble multiple particles of Ni and NiO into a single complex structure, increasing the Ni-NiO interface density. This type of particle growth is not seen before and is explained to be due to the fact that the process operates in a single-step approach, where both Ni and O can arrive at the formed nanoparticle nuclei and aid in the continuous particle growth. The finished particle will then be a consequence of the initially formed crystal, as well as the arrival rate ratio of the two species. These particles hold great potential for applications in fields, such as electroand photocatalysis, where the ability to control the level of oxidation and/or interface density is of great importance.

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Section: Introductionmentioning

confidence: 99%

Growth of semi-coherent Ni and NiO dual-phase nanoparticles using hollow cathode sputtering

et al. 2019

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“…The peak at 25.4°, corresponding to the characteristic crystal diffraction of the graphene structure (002) was observed in the XRD spectrum of rGO paper. In XRD data of NiMOF, the peaks at about 35.6°, 42.1°, 45.3°, 50.2°, 62.2°, and 75.4 correspond to the (111), (200), (220), (311), and (222) structure of Ni, respectively (JCPDS card No: 47–1049) . In the XRD pattern of NiMOF/rGO paper, diffraction peaks of both rGO and NiMOF powder structure were observed which indicates the successful preparation of NiMOF/rGO composite paper.…”

Section: Resultsmentioning

confidence: 96%

Preparation and Characterization of Highly Flexible, Free‐Standing, Three‐Dimensional and Rough NiMOF/rGO Composite Paper Electrode for Determination of Catechol

Kıranşan

2019

ChemistrySelect

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The flexible, free-standing and durable highly rough nickel metal-organic framework/reduced graphene oxide (NiMOF/ rGO) composite paper electrode was prepared with a simple electrochemical deposition of NiMOF structures on the surface of the rGO paper electrode. NiMOF/rGO composite paper electrode was characterized by using scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), Raman spectroscopy and electrochemical impedance spectroscopy (EIS) techniques. As-prepared NiMOF/ rGO composite paper was used in the electrochemical detection of catechol (CC). The rough and flower-like three-dimensional (3D) NiMOF nanostructures on the rGO paper electrode surface greatly increased the catalytic performance of the paper electrode by providing a large active surface area. CC was detected on NiMOF/rGO composite paper in a very wide linear range from 0.02 to 760 μM, a low detection limit of 1.8 nM (S/N = 3), with a high sensitivity of 0.158 mA μM cm À 2 and very high selectivity, especially in the presence of phenolderived materials. Furthermore, it was determined that NiMOF/ rGO composite paper also had high stability, flexibility, and durability, which may enable this material to be used in-vivo applications.[a] Dr. durability, which makes it possible to use this material in in vivo applications. The interference study performed with the rGO paper electrode was shown to prove that the NiMOF/rGO composite paper electrode was very selective for CC compared to rGO paper.

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“…The broadened 2θ peak of graphene (002) plane is found at approximately 23°-25°. However, the graphene (002) plane of PtNi/PDDA-G nanohybrids shifted to 20.5°-21°, which shows that the interplanar spacing (d spacing) of graphene is expanded by the intercalation of PDDA, as shown in Figure 1b [21][22][23][24]. Furthermore, three XRD peaks is observed at 2θ = 40.2°, 46.3°, and 67.6°, which attributed to the crystalline plane of (111), (200) and (220) planes in the PtNi alloy nanoparticles, respectively [25,26].…”

Section: Resultsmentioning

confidence: 96%

Synthesis of PtNi Alloy Nanoparticles on Graphene-Based Polymer Nanohybrids for Electrocatalytic Oxidation of Methanol

et al. 2016

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Abstract:We have successfully produced bimetallic PtNi alloy nanoparticles on poly (diallyldimethylammonium chloride) (PDDA)-modified graphene nanosheets (PtNi/PDDA-G) by the "one-pot" hydrothermal method. The size of PtNi alloy nanoparticles is approximately 2-5 nm. The PDDA-modified graphene nanosheets (PDDA-G) provides an anchored site for metal precursors; hence, the PtNi nanoparticles could be easily bond on the PDDA-G substrate. PtNi alloy nanoparticles (2-5 nm) display a homogenous alloy phase embedded on the PDDA-G substrate, evaluated by Raman, X-ray diffractometer (XRD), thermal gravity analysis (TGA), electron surface chemical analysis (ESCA), and electron energy loss spectroscopy (EELS). The Pt/Ni ratio of PtNi alloy nanoparticles is~1.7, examined by the energy dispersive spectroscopy (EDS) spectra of transmitting electron microscopy (EDS/TEM spectra) and mapping technique. The methanol electro-oxidation of PtNi/PDDA-G was evaluated by cyclic voltammetry (CV) in 0.5 M of H 2 SO 4 and 0.5 M of CH 3 OH. Compared to Pt on carbon nanoparticles (Pt/C) and Pt on Graphene (Pt/G), the PtNi/PDDA-G exhibits the optimal electrochemical surface area (ECSA), methanol oxidation reaction (MOR) activity, and durability by chrono amperometry (CA) test, which can be a candidate for MOR in the electro-catalysis of direct methanol fuel cells (DMFC).

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Synthesis and characterizations of Ni-NiO nanoparticles on PDDA-modified graphene for oxygen reduction reaction

Cited by 72 publications

References 27 publications

Growth of semi-coherent Ni and NiO dual-phase nanoparticles using hollow cathode sputtering

Growth of semi-coherent Ni and NiO dual-phase nanoparticles using hollow cathode sputtering

Preparation and Characterization of Highly Flexible, Free‐Standing, Three‐Dimensional and Rough NiMOF/rGO Composite Paper Electrode for Determination of Catechol

Synthesis of PtNi Alloy Nanoparticles on Graphene-Based Polymer Nanohybrids for Electrocatalytic Oxidation of Methanol

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