Improved catalytic activity of cobalt core–platinum shell nanoparticles supported on surface functionalized graphene for methanol electro-oxidation

Zhang, Mingmei; Li, Yuan; Yan, Zaoxue; Jing, Junjie; Xie, Jimin; Chen, Min

doi:10.1016/j.electacta.2015.01.160

Cited by 44 publications

(22 citation statements)

References 57 publications

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“…Despite several attempts, [73,74], single crystal of the studied complex could not be obtained. Therefore, the XRD-powder pattern of the Pt(II) complex was investigated in order to test the degree of crystallinity of the complex [75][76][77][78]. The X-ray powder diffraction patterns of the complex were determined over 2θ = 5-80 • and six important peaks were observed in the angle range of 10-70 • (2θ), which arise from diffraction of X-rays by the planes of the complex (Figure 4).…”

Section: Resultsmentioning

confidence: 99%

Pt(II) complex of Schiff base derived from L-phenylalanine and furfuraldehyde in the presence of 8-hydroxyquinoline: Structural analysis, composition of complex and biological activity

Altun¹,

Koçer²

2020

Comptes Rendus. Chimie

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In the present study, we synthesized a Schiff base (L 1) derived from L-phenylalanine with furfuraldehyde and its Pt(II) complex ([Pt(L 1)(L 2)]: [Pt(N-(furfuralidene)phenylalanine)(8hydroxyquinoline)]) in the presence of 8-hydroxyquinoline (L 2). The chemical structures of the synthesized Schiff base and Pt(II) complex were characterized using ESI-MS, UV-Visible, FT-IR, 1 H NMR, 13 C NMR, and powder-XRD spectroscopy. The surface morphologies and elemental composition were determined by SEM and EDX. Thermal analysis was performed with TG-DTA. Mole ratio of Meyer and Job methods were used for the composition of complexes. According to these methods, the ratio [Pt 2+ ] : [L 1 + L 2 ] was found to be 1 : 1. In addition, the antimicrobial activities of L 1 and the complex showed that the compounds have significant antibacterial and antifungal properties. They also show important cytotoxic effects against the growth of mouse embryo fibroblasts (MEF) and human prostate adenocarcinoma (Du145) cancer cells. L 1 , L 2 , and the Pt(II) complex also displayed effective antioxidant activity.

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Section: Resultsmentioning

confidence: 99%

Pt(II) complex of Schiff base derived from L-phenylalanine and furfuraldehyde in the presence of 8-hydroxyquinoline: Structural analysis, composition of complex and biological activity

Altun¹,

Koçer²

2020

Comptes Rendus. Chimie

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“…[133] Other similar examples of cobalt-based electrocatalyst using different precursors and supporting materials have been also reported and shows satisfactory performance in methanol oxidation. [134][135][136][137][138]…”

Section: Cobaltmentioning

confidence: 99%

A comprehensive and critical review on recent progress in anode catalyst for methanol oxidation reaction

2020

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The synthesis of anode electrocatalyst with high activity and durability for methanol oxidation reaction has been one of the main focuses of researchers in recent years. Several works are reviewed in this paper to summarize and compare the performance of electrocatalysts comprising of noble and non-noble metals. The effect of manipulating catalysts by introducing nanostructured morphology, metal alloys, support materials, acidic or basic electrolyte, and synthesis methods are also examined. The paper finally concludes with details of challenges that are generally faced in making direct methanol fuel cell (DMFC) a reliable source of energy for future prospects, and the approach to be taken to reduce the complexity in synthesizing new generations of anode electrocatalysts.

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“…[15][16][17] Recently, there are many reports on core-shell nanostructure in which the transition metals like Ni, Co, Cu are placed in core and the noble metal on the shell. [18,19] The strategy of alloying such an element having a smaller lattice constant than Pd can modify the catalytic activity of Pd by the reduction of PdÀ Pd bond distance, which in turns result in the weakening of the bond. Moreover, these elements are multifunctional catalyst so they can improve the catalytic activity by the synergetic effect.…”

Section: Introductionmentioning

confidence: 99%

Electrocatalytic Investigation of M@Pd (M=Ni, Co, Cu) Core‐Shell Nanostructure Supported on N, S‐Doped Reduced Graphene Oxide towards Hydrogen and Oxygen Evolution Reaction

et al. 2020

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The strong affinity of palladium (Pd) towards hydrogen is the main challenge for hydrogen desorption application. Therefore, in this report, we synthesized nickel, copper, and cobalt core and palladium shell nanostructure supported on nitrogen, sulfur‐doped reduced graphene oxide (M@Pd/N, S‐rGO, M=Ni, Cu, Co) by hydrothermal method followed by reduction of the metal nanoparticles using modified polyol method. Using X‐ray diffraction (XRD), Raman spectroscopy, High resolution transmission electron microscope (HRTEM), Field emission scanning electron microscope (FESEM), and X‐ray photoelectron spectroscopy (XPS), the physicochemical properties of the synthesized sample was investigated. The results confirm strong interactions between M@Pd and higher surface area support that could enhance electrocatalytic activity towards hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). Among the synthesized electrocatalyst, Ni@Pd/N,S‐rGO exhibits higher electrocatalytic activity with small over potential 0.035 V and 0.2 V at 10 mA/cm2 and a Tafel slope value of 39 mV dec−1 and 34 mV dec−1 for HER and OER, respectively. The Ni@Pd/N,S‐rGO electrocatalyst demonstrated excellent stability with a negligible current decrease for 12 h. The Cdl calculation shows a result of 2.2 mF μg−1 for Ni@Pd/N,S‐rGO, 1.9 mF μg−1 for Cu@Pd/N,S‐rGO, and 1.5 mF μg−1 for Co@Pd/N,S‐rGO.

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Improved catalytic activity of cobalt core–platinum shell nanoparticles supported on surface functionalized graphene for methanol electro-oxidation

Cited by 44 publications

References 57 publications

Pt(II) complex of Schiff base derived from L-phenylalanine and furfuraldehyde in the presence of 8-hydroxyquinoline: Structural analysis, composition of complex and biological activity

Pt(II) complex of Schiff base derived from L-phenylalanine and furfuraldehyde in the presence of 8-hydroxyquinoline: Structural analysis, composition of complex and biological activity

A comprehensive and critical review on recent progress in anode catalyst for methanol oxidation reaction

Electrocatalytic Investigation of M@Pd (M=Ni, Co, Cu) Core‐Shell Nanostructure Supported on N, S‐Doped Reduced Graphene Oxide towards Hydrogen and Oxygen Evolution Reaction

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