Synthesis and electrochemical study of Pt-based nanoporous materials

Wang, Jingpeng; Holt-Hindle, Peter; MacDonald, Duncan; Thomas, Dan F.; Chen, Aicheng

doi:10.1016/j.electacta.2008.02.028

Cited by 89 publications

(80 citation statements)

References 65 publications

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“…When the electrode was tested at the potential of +0.30 V, its current density dramatically decreased (Fig. 3a), most probably due to the deactivation of the electrode surface [42].…”

Section: Electrocatalytic Properties Of Pd-cile Electrode Towards Oximentioning

confidence: 98%

Electrocatalytic oxidation of formaldehyde on palladium nanoparticles electrodeposited on carbon ionic liquid composite electrode

Safavi

Maleki

Farjami

et al. 2009

Journal of Electroanalytical Chemistry

109

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“…When the electrode was tested at the potential of +0.30 V, its current density dramatically decreased (Fig. 3a), most probably due to the deactivation of the electrode surface [42].…”

Section: Electrocatalytic Properties Of Pd-cile Electrode Towards Oximentioning

confidence: 98%

Electrocatalytic oxidation of formaldehyde on palladium nanoparticles electrodeposited on carbon ionic liquid composite electrode

Safavi

Maleki

Farjami

et al. 2009

Journal of Electroanalytical Chemistry

109

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“…The Co content values were 37 and 33% for deposition times 15 and 30 minutes, respectively. In addition, the corrosion resistance of the nanocrystalline Ni-Co alloys can be changed by altering the Co content [47]. Srivastava et al [48] reported poor corrosion behavior of cobalt-rich coatings by increasing the Co content beyond 20%.…”

Section: Potentiodynamic Polarization Testmentioning

confidence: 99%

Morphology and Electrochemical Characterization of Electrodeposited Nanocrystalline Ni-Co Electrodes for Methanol Fuel Cells

Abdel-Karim

Ramadan

El‐Raghy

2018

Journal of Nanomaterials

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An electrocatalytic electrode surface was developed for alcoholic fuel cell by electrodeposition of Ni-Co alloy on a 301 stainless steel substrate. Material characterization by EDX and XRD confirmed deposition of Ni-Co alloy on stainless steel surfaces with a cobalt content of 15-35%. SEM showed nodular and/or angular particles with some subparticles embedded within the coarse nodules. Increasing the deposition current density as well as deposition time leads to deposition of Ni-Co alloys characterized by coarse angular morphology with lower cobalt content. The electrocatalytic activity of the coated electrodes was characterized by potentiodynamic polarization test, electrochemical impedance spectroscopy (EIS), and cyclic voltammetry (CV) tests in anodic solution for electrochemical oxidation of methanol. Polarization study showed very much higher current density for the coated electrode compared to bare stainless steel. According to the EIS test in 1 M methyl alcohol acidic solution, it was found that polarization resistance of the coated sample was much lower compared to the bare substrate. The electrical equivalent circuit at the metal solution interface was found to be matching Randle with Warburg resistance. The results of the CV test showed higher peaks for alcohol oxidation and oxygen reduction compared to the bare substrate. The alloy coating with increased effective surface area leads to enhancement in the electrocatalytic activity of the electrodes. The alloys deposited at current densities of 50 and 80 mA/cm 2 for 30 minutes (15-16% Co) had higher catalytic activity of the Ni-Co nanocrystalline deposits for methanol oxidation for direct methanol fuel cells, than those under other deposition conditions.

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“…However, some of the Pt-TM alloys are electrochemically unstable due to the dissolution of the surface TM atoms [5,10] in acidic media. Thus, many Pt-alloys formed from Platinum Group Metals (PGMs) are proposed for MOR [11][12][13] and ORR [14,15], demonstrating higher catalytic activities and improved electrochemical stability compared to bimetallic Pt-TM alloys [16]. Among Pt-PGM alloys, Pt-Ir displayed improved activities toward both MOR and ORR compared to Pt-metal catalyst [13,17,18].…”

Section: Introductionmentioning

confidence: 99%

“…Thus, many Pt-alloys formed from Platinum Group Metals (PGMs) are proposed for MOR [11][12][13] and ORR [14,15], demonstrating higher catalytic activities and improved electrochemical stability compared to bimetallic Pt-TM alloys [16]. Among Pt-PGM alloys, Pt-Ir displayed improved activities toward both MOR and ORR compared to Pt-metal catalyst [13,17,18]. Moreover, ternary alloys formed by adding Ir metal to Pt-TM alloys possess improved affinity to form Pt skin compared to their bimetallic counterparts.…”

Section: Introductionmentioning

confidence: 99%

Methanol Oxidation and Oxygen Reduction Activity of PtIrCo-Alloy Nanocatalysts Supercritically Deposited within 3D Carbon Aerogel Matrix

Kolla

Smirnova

2015

Electrochimica Acta

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Synthesis and electrochemical study of Pt-based nanoporous materials

Cited by 89 publications

References 65 publications

Electrocatalytic oxidation of formaldehyde on palladium nanoparticles electrodeposited on carbon ionic liquid composite electrode

Electrocatalytic oxidation of formaldehyde on palladium nanoparticles electrodeposited on carbon ionic liquid composite electrode

Morphology and Electrochemical Characterization of Electrodeposited Nanocrystalline Ni-Co Electrodes for Methanol Fuel Cells

Methanol Oxidation and Oxygen Reduction Activity of PtIrCo-Alloy Nanocatalysts Supercritically Deposited within 3D Carbon Aerogel Matrix

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