Ni@Pd core-shell nanostructure supported on multi-walled carbon nanotubes as efficient anode nanocatalysts for direct methanol fuel cells with membrane electrode assembly prepared by catalyst coated membrane method

Hosseini, Mir Ghasem; Mahmoodi, R.; Daneshvari-Esfahlan, Vahid

doi:10.1016/j.energy.2018.07.148

Cited by 38 publications

(9 citation statements)

References 60 publications

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“…The ratio of current value of forward scan peak (I f )t o that of backward scan peak (I b )isusually employed for evaluating the tolerance of catalysts toward carbonaceous intermediates such as CH 2 O, CHO, CO and so forth. [58,59] The I f /I b value of PdCu NCs was estimatedt ob e2 .62, which is larger than those of PdCu NCs-H (2.52), PdCu NCs-L (2.40) and commercial Pd/C (2.39).T he large I f /I b valueo fP dCuN Cs demonstrates itss uperior endurancet owardc arbonaceousintermediates,w hich is conducive to enhancingt he electrocatalytic durability ands tability.…”

Section: Resultsmentioning

confidence: 92%

“…As well all know, the carbonaceous intermediates which are derived from incomplete oxidation of methanol will block the catalytic active sites and result in the deactivation of electrocatalysts. The ratio of current value of forward scan peak ( I f ) to that of backward scan peak ( I b ) is usually employed for evaluating the tolerance of catalysts toward carbonaceous intermediates such as CH 2 O, CHO, CO and so forth . The I f / I b value of PdCu NCs was estimated to be 2.62, which is larger than those of PdCu NCs‐H (2.52), PdCu NCs‐L (2.40) and commercial Pd/C (2.39).…”

Section: Resultsmentioning

confidence: 99%

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Facile Synthesis of PdCu Echinus‐Like Nanocrystals as Robust Electrocatalysts for Methanol Oxidation Reaction

Zhang

Ren

Liu

et al. 2019

Chemistry An Asian Journal

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Exploiting high‐performance and inexpensive electrocatalysts for methanol electro‐oxidation is conductive to promoting the commercial application of direct methanol fuel cells. Here, we present a facile synthesis of echinus‐like PdCu nanocrystals (NCs) via a one‐step and template‐free method. The echinus‐like PdCu NCs possess numerous straight and long branches which can provide abundant catalytic active sites. Owing to the novel nanoarchitecture and electronic effect of the PdCu alloy, the echinus‐like PdCu NCs display high electrocatalytic performance toward methanol oxidation reaction in an alkaline medium. The mass activity of echinus‐like PdCu NCs is 1202.1 mA mgPd−1, which is 3.7 times that of Pd/C catalysts. In addition, the echinus‐like structure, as a kind of three‐dimensional self‐supported nanoarchitecture, endows PdCu NCs with significantly enhanced stability and durability. Hence, the echinus‐like PdCu NCs hold prospect of being employed as electrocatalysts for direct alcohol fuel cells.

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Section: Resultsmentioning

confidence: 92%

Section: Resultsmentioning

confidence: 99%

Facile Synthesis of PdCu Echinus‐Like Nanocrystals as Robust Electrocatalysts for Methanol Oxidation Reaction

Zhang

Ren

Liu

et al. 2019

Chemistry An Asian Journal

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“…Finally, further research is still required to overcome current limitations and develop processes with performances that simultaneously optimize all the figures of merit analyzed in this study. In this regard, research efforts should focus on the development of new filter press configurations [ 70 , 71 ] such as the use of a three-compartment electrochemical reactor, bipolar membranes [ 72 ], or working electrode configurations [ 73 ] to enhance the mass transfer of the reagents and products in the counter and working electrode, and simultaneously address the synthesis of innovative electrocatalysts for both cathode [ 74 ] and anode [ 75 ] to reduce the energy consumption in both compartments of the electrochemical reactor.…”

Section: Comparative Study Of the Catalyst Naturementioning

confidence: 99%

Continuous Electrochemical Reduction of CO2 to Formate: Comparative Study of the Influence of the Electrode Configuration with Sn and Bi-Based Electrocatalysts

2020

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Climate change has become one of the most important challenges in the 21st century, and the electroreduction of CO2 to value-added products has gained increasing importance in recent years. In this context, formic acid or formate are interesting products because they could be used as raw materials in several industries as well as promising fuels in fuel cells. Despite the great number of studies published in the field of the electrocatalytic reduction of CO2 to formic acid/formate working with electrocatalysts of different nature and electrode configurations, few of them are focused on the comparison of different electrocatalyst materials and electrode configurations. Therefore, this work aims at presenting a rigorous and comprehensive comparative assessment of different experimental data previously published after many years of research in different working electrode configurations and electrocatalysts in a continuous mode with a single pass of the inputs through the reactor. Thus, the behavior of the CO2 electroreduction to formate is compared operating with Sn and Bi-based materials under Gas Diffusion Electrodes (GDEs) and Catalyst Coated Membrane Electrodes (CCMEs) configurations. Considering the same electrocatalyst, the use of CCMEs improves the performance in terms of formate concentration and energy consumption. Nevertheless, higher formate rates can be achieved with GDEs because they allow operation at higher current densities of up to 300 mA·cm−2. Bi-based-GDEs outperformed Sn-GDEs in all the figures of merit considered. The comparison also highlights that in CCME configuration, the employ of Bi-based-electrodes enhanced the behavior of the process, increasing the formate concentration by 35% and the Faradaic efficiency by 11%.

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“…Figure 8a reveals that as the scan rate is increased the anodic peak current increases. Hence, the current is linearly proportionally to the square root of sweep rate, which implies that the methanol oxidation on PdÀ Ru/CNFs nanocatalyst on the electrode might be controlled by a diffusion process [55,56].…”

Section: The Effect Of Sweep Rate On the Current Densitymentioning

confidence: 99%

Electro‐oxidation of Ethanol and Methanol on Pd/C, Pd/CNFs and Pd−Ru/CNFs Nanocatalysts in Alkaline Direct Alcohol Fuel Cell

et al. 2020

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Pd/C, Pd/CNFs and PdÀ Ru/CNFs nanocomposite materials were utilized as anode nanocatalysts in lowtemperature alkaline direct alcohol fuel cells. The palladium based nanocatalysts performance and stability were firmly relying upon the attributes of the carbon nanofibers (CNFs). CNFs were successfully synthesized employing a chemical vapour deposition method. The nanocatalysts were synthesized by dispersing Pd and PdÀ Ru nanoparticles onto the CNFs surface using alcohol reduction method. The physical properties of the synthesized nanocatalysts were explored utilizing several techniques such as transmission electron microscope (TEM), scanning electron microscope-Energy dispersive x-ray (SEM-EDX), X-ray diffraction spectroscopy (XRD), X-ray photoelectron spectroscopy (XPS) and Inductively Coupled Plasma Optical Emission Spectrometry (ICP-OES) and confirmed successful synthesis of Pd/C, Pd/ CNFs and PdÀ Ru/CNFs nanocomposite. TEM showed that Pd and Ru nanoparticles were uniformly dispersed on the CNFs support surface. ICP-OES determined the palladium and ruthenium concentration in Pd/C, Pd/CNFs and PdÀ Ru/CNFs nanocatalysts to be Pd (7.67 %), Pd (7.74 %), Pd (7.82 %) and Ru (3.22 %) respectively. The three prepared nanocatalysts were evaluated by cyclic voltammetry (CV), chronoamperometry (CA) and electrochemical impedance spectroscopy (EIS) in the evaluation of ethanol and methanol oxidation reactions. CV, CA and EIS experiments of PdÀ Ru/CNFs nanocatalyst displayed superior activity towards alcohol oxidation reaction in alkaline conditions than Pd/CNFs and commercial Pd/C nanocatalysts.

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Ni@Pd core-shell nanostructure supported on multi-walled carbon nanotubes as efficient anode nanocatalysts for direct methanol fuel cells with membrane electrode assembly prepared by catalyst coated membrane method

Cited by 38 publications

References 60 publications

Facile Synthesis of PdCu Echinus‐Like Nanocrystals as Robust Electrocatalysts for Methanol Oxidation Reaction

Facile Synthesis of PdCu Echinus‐Like Nanocrystals as Robust Electrocatalysts for Methanol Oxidation Reaction

Continuous Electrochemical Reduction of CO2 to Formate: Comparative Study of the Influence of the Electrode Configuration with Sn and Bi-Based Electrocatalysts

Electro‐oxidation of Ethanol and Methanol on Pd/C, Pd/CNFs and Pd−Ru/CNFs Nanocatalysts in Alkaline Direct Alcohol Fuel Cell

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