Multi-laminated copper nanoparticles deposited on conductive substrates for electrocatalytic oxidation of methanol in alkaline electrolytes

Xia, Lun-Peng; Guo, Peng; Wang, Yan; Ding, Shiqi; He, Jianbo

doi:10.1016/j.jpowsour.2014.03.139

Cited by 29 publications

(27 citation statements)

References 42 publications

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“…32 No low-frequency inductive loop and linear portion in lower frequency range are observed, suggesting the electrochemical systerms in our case are only electron transfer-limited. 33 The size of the arc can reveal the kinetics of the methanol electrooxidation reaction. 34 The order of the semicircle diameters of the prepared catalysts is Ti 30 5 amorphous alloy would exhibit the lowest charge transfer resistance and the methanol oxidation occurs more easily.…”

Section: Resultsmentioning

confidence: 99%

Preparation of Nanoporous Pd/CuO by Dealloying and Their Electrocatalysis for Methanol in Alkaline Condition

Zhu

et al. 2014

J. Electrochem. Soc.

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A novel and simple approach for fabrication of nanoporous Pd/CuO catalysts is reported. The nanoporous Pd/CuO catalysts were successfully prepared by chemical dealloying Ti-Cu-Pd amorphous alloy in a 1.25 M HCl solution. The scanning electron microscopy (SEM) and transmission electron microscopy (TEM) tests homogeneous nanoporous structures are formed. The Pd: CuO ratio of the catalysts could be controled by adjusting the original composition of the alloy. Cyclic voltammetry (CV) and chronoamperometry (CA) were used to measure the electrocatalytic activities of the Pd/CuO catalysts. It was found that the catalytic activity was improved firstly and then depressed by increasing Pd content within both EASA and methanol electro-oxidation region. The catalyst prepared by Ti 30 Cu 60 Pd 10 ribbon showed the best catalytic activity due to appropriate Pd: CuO ratio. The peak current densities in the CV curves were increased with the increase of the methanol concentration, and the catalysts maintained good electrocatalytic activities in the solution with high methanol concentration (4 M). In addition, the charge transfer resistance tested by electrochemical impedance spectroscopy (EIS) decreases with the increase of CuO content, this indicates Pd : CuO ratio plays very important role in the electro-catalytic process and confirms the bifuntional mechanism of CuO. Small organic molecules have attracted intense attention as promising applications in fuel cell field. To date, Pt and Pt based catalysts are the most widely used catalysts in fuel cell anode for small organic molecules electro-oxidation.1 However, the commercial application of fuel cells is limited by the high cost and low stability of traditional Pt catalysts.2 Hence, it is important to develop new catalysts with low cost and high electrochemical activities. Pd is the most Pt-like material, and compared with Pt, Pd is less expensive. Moreover, Pd catalysts exhibit higher electro-catalytic perfromence and better CO resistance than Pt. However, the bulk Pd cannot meet the requirement of commercial application due to its relatively low catalytic activity.Adding auxiliary materials is a traditional way to enhance the catalytic activity of Pd. The foreign metal can improve the catalytic activity via electronic effect, such as Ni, 2 Co, 3 Fe 4,5 and Ru. 6 Moreover, noble metal catalysts usually suffer from catalysts poison induced by CO adsorption during the catalysis process. The oxygen-containing groups generate on transition metal oxides (such as CuO,7 TiO 2 8 and WO 3 ) 9 can effectively remove CO, therefore the transition metal oxides is another common species of auxiliary materials.In order to maximize the utilization of Pd, it is necessary to synthetize catalysts with high specific surface area. Nanoporous materials have been drawn much attention for their wide applications such as sensing, 10 catalysis 11,12 and fuel cells 2,4,13 due to their large specific surface area, excellent electrical conductivities and high stability. Many efforts have been devoted to...

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Section: Resultsmentioning

confidence: 99%

Preparation of Nanoporous Pd/CuO by Dealloying and Their Electrocatalysis for Methanol in Alkaline Condition

Zhu

et al. 2014

J. Electrochem. Soc.

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“…The high surface area and porosity of the CuZn electrode may be principal factors in enhancing activity, in addition to the interaction of Cu and Zn (electronic effect). In similar study, Jian-Bo He et al [57] studied the catalytic activity of Cu/PAMT/sCPE (Cu paricles/poly-2-amino-5-mercapto-1,3,4-thiadiazole layer/solid carbon paste electrode) in 0.5 M NaOH solution containing 0.5 M methanol. They reported that total resistance was 2.041 U cm 2 .…”

Section: Electrochemical Impedance Spectroscopymentioning

confidence: 99%

Fabrication and characterization of alkaline leached CuZn/Cu electrode as anode material for direct methanol fuel cell

Döner

Solmaz

Kardaş

2015

Energy

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“…The substrate for the deposition is a solid carbon paste electrode (sCPE), which has recently been used to deposit multi-laminated Cu platelets with well-controlled orientation for catalytic oxidation of methanol [23]. It is found that the restriction on the diffusion of PtCl 6 2− ions led to a stable transient current, and beyond expectation, improved initial nucleation rate of Pt.…”

Section: Introductionmentioning

confidence: 99%

Diffusion-restricted electrodeposition of platinum on solid carbon paste for electrocatalytic oxidation of methanol

Bao

Wang

et al. 2016

Catalysis Today

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Multi-laminated copper nanoparticles deposited on conductive substrates for electrocatalytic oxidation of methanol in alkaline electrolytes

Cited by 29 publications

References 42 publications

Preparation of Nanoporous Pd/CuO by Dealloying and Their Electrocatalysis for Methanol in Alkaline Condition

Preparation of Nanoporous Pd/CuO by Dealloying and Their Electrocatalysis for Methanol in Alkaline Condition

Fabrication and characterization of alkaline leached CuZn/Cu electrode as anode material for direct methanol fuel cell

Diffusion-restricted electrodeposition of platinum on solid carbon paste for electrocatalytic oxidation of methanol

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