One-pot wet-chemical co-reduction synthesis of bimetallic gold–platinum nanochains supported on reduced graphene oxide with enhanced electrocatalytic activity

Chen, Dejun; Zhang, Qianli; Feng, Jinxia; Ju, Ke-Jian; Wang, Ai‐Jun; Wei, Jie; Feng, Jiu‐Ju

doi:10.1016/j.jpowsour.2015.04.080

Cited by 45 publications

(19 citation statements)

References 53 publications

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“…Chronoamperometry is often used to evaluate the stability of a catalyst toward the production of an electrochemical current over time [34], such method does not mimic the start-up and shut-down processes found in fuel cells. To overcome this issue, one option is to measure the decay in electrochemically active surface area in the presence of the electrolyte during several cyclic voltammetry cycles over a wide range of potentials [9,17,35]. Although reliable, this approach is not ideal because it is usually performed in absence of fuel.…”

Section: Evaluation Of Biomass-derived Electrooxidation and Stabilitymentioning

confidence: 99%

Understanding the Influence of the Biomass-Derived Alcohols on the Activity and Stability of Pt Nanoparticles Supported on Graphene Nanoribbons

et al. 2017

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We produced Pt/GNRs by a one-step synthesis procedure and evaluated their electroactivity and stability towards glycerol electrooxidation reaction (GEOR) for the first time. We compared the electrocatalytic performance of GEOR with methanol and ethanol electrooxidation on Pt/GNRs at identical experimental conditions. The activities and stabilities for these biomass-derived alcohols electrooxidation on Pt/GNRs were compared to commercial Pt/C. The synthesis of the Pt/GNRs was confirmed by transmission electron microscopy, x-ray diffractometry, ultraviolet spectrophotometry and Raman spectroscopy. We found that the activities of Pt/GNRs for these reactions are comparable to Pt/C, with improvement in terms of current density for methanol electrooxidation. Comparing potentiostatic measurements, we found that glycerol produces lower pseudo-stationary current densities than ethanol and methanol on both catalysts, with greatest values found for methanol electrooxidation on Pt/C. Otherwise, the GNRs remarkably enhance the stability of the catalyst for all the reactions, by increasing the stability of the current density during successive potential cycles, and by preventing the loss of electrochemically active surface area by avoiding carbon corrosion and Pt detachment. Moreover, we showed that the stability of the NPs depends on the biomass-derived alcohol used. The solution containing methanol reveals itself the most aggressive electrochemical environment to the catalyst, impacting in the decrease of surface area, while glycerol is less aggressive. Hence, the different products formed at the interface electrode / solution might lead to different electrochemical environment, which plays an important role on the stability of the catalysts.

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Section: Evaluation Of Biomass-derived Electrooxidation and Stabilitymentioning

confidence: 99%

Understanding the Influence of the Biomass-Derived Alcohols on the Activity and Stability of Pt Nanoparticles Supported on Graphene Nanoribbons

et al. 2017

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“…48,51 Larger ratio of the peak currents in the forward potential scan (i f ) to the reverse scan (i r ) would bring better poisoning-resistant ability of the electrodes for EG oxidation. The oxidation peak in the backward scan corresponds to the electrochemical oxidation of CO and other adsorbed species.…”

Section: Electrocatalytic Performance Of the Au Nssmentioning

confidence: 99%

“…6b) exhibits two signicant Au 4f peaks at the binding energy of 83.98 eV (Au 4f 7/2 ) and 87.68 eV (Au 4f 5/2 ), which are assigned to metallic Au. 48 Thus, the result conrms that as-prepared nanostructure is composed of metallic Au.…”

mentioning

confidence: 97%

Shape-controlled electrochemical synthesis of Au nanocrystals in reline: control conditions and electrocatalytic oxidation of ethylene glycol

Chen

Duan

et al. 2017

RSC Adv.

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Gold nanocrystals (NCs) as advanced catalysts towards ethylene glycol (EG) electrooxidation in direct alcohol fuel cells (DAFCs) have some advantages, such as good poisoning-resistance and high electrocatalytic activity. The shape and size control of Au NCs are crucial to their electrocatalytic activity.In this work, the control of morphologies and sizes of prepared Au NCs in reline are systematically investigated by changing electrodeposition conditions: the applied potential, electrodeposition temperature, HAuCl 4 concentration and electrodeposition time. Results show that reline (a deep eutectic solvent (DES), a mixture of choline chloride and urea at the molar ratio of 1 : 2) plays an important part in the nucleation and growth of the star-like Au NCs. This approach for preparing star-like Au NCs in reline does not need any supporting electrolyte and organic solvent, and thus is more environmentally friendly than water as a medium. The electrode modified by the as-prepared Au nanostars (NSs) exhibits a good poisoning-resistance ability and electrocatalytic activity for EG electrooxidation in alkaline media. This strategy is a significant way for shape-controlled synthesis of noble metal nanomaterials in DESs that may have potential applications in fields of electrochemical sensors, electrocatalysis and fuel cells.

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“…The graphene materials have been emerging in the electrocatalysis and electroanalysis as the potent surface modifying agents for the working electrodes, where the presence of graphenated materials selectively increased the rate of electron transfer and sensitivity of determination of the analyte [16][17][18][19][20][21][22][23][24][25]. However, the aqueous electrochemistry of the actinides on graphenated materials is yet unexplored.…”

Section: Introductionmentioning

confidence: 99%

Reduced Graphene Oxide: Is it a promising catalyst for the electrochemistry of [UO2(CO3)3]4−/[UO2(CO3)3]5−?

Guin

Ambolikar

Kamat

2015

Electrochimica Acta

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One-pot wet-chemical co-reduction synthesis of bimetallic gold–platinum nanochains supported on reduced graphene oxide with enhanced electrocatalytic activity

Cited by 45 publications

References 53 publications

Understanding the Influence of the Biomass-Derived Alcohols on the Activity and Stability of Pt Nanoparticles Supported on Graphene Nanoribbons

Understanding the Influence of the Biomass-Derived Alcohols on the Activity and Stability of Pt Nanoparticles Supported on Graphene Nanoribbons

Shape-controlled electrochemical synthesis of Au nanocrystals in reline: control conditions and electrocatalytic oxidation of ethylene glycol

Reduced Graphene Oxide: Is it a promising catalyst for the electrochemistry of [UO2(CO3)3]4−/[UO2(CO3)3]5−?

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