Investigation on ethanol electrooxidation via electrodeposited Pd–Co nanostructures supported on graphene oxide

Rostami, Hussein; Rostami, Abbas Ali; Omrani, Abdollah

doi:10.1016/j.ijhydene.2015.06.151

Cited by 33 publications

(11 citation statements)

References 55 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, the specific activity of PdAg 3 /CNT for alcohol oxidation reaction is lower 24 than that of PdAg/CNT, indicating the further addition of Ag will lower down the specific activity of Pd. Alloying Pd and Ag reduces the particle size of Ag to less than 3 nm without use of surfactants ( Figure 1, Supplementary information, Table S7), raising the catalyst's activity towards alcohol oxidation reaction network ( Figure 4, and Supplementary information, Figure S2) likely by exploiting spillover of aldehyde intermediates to Ag active sites with high TOF e -toward aldehyde oxidation.…”

mentioning

confidence: 94%

“…One method of reducing the cost of catalyst layer is to lower down the loading of Pt, while another method is to replace Pt with more abundant and less expensive Pd. To prepare highly active Pd-based catalysts, a number of strategies have been investigated, including controlling the morphology of Pd [15][16][17][18][19], alloying other elements to prepare Pd-M catalyst [20][21][22][23][24][25], and improving the surface area of the catalyst support [26][27][28].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

PdAg/CNT catalyzed alcohol oxidation reaction for high-performance anion exchange membrane direct alcohol fuel cell (alcohol = methanol, ethanol, ethylene glycol and glycerol)

Benipal

Liang

et al. 2016

Applied Catalysis B: Environmental

162

View full text Add to dashboard Cite

2 3 1.PdAg/CNT with 2.7 nm average particle size is prepared without using surfactants. 2.Ag outperforms Pt, Pd, and Au towards electrocatalytic aldehyde oxidation. 3.PdAg/CNT has high activity towards electrocatalytic alcohol oxidation. 4.PdAg/CNT was used as a highly active anode catalyst for direct alcohol fuel cells. 5.PdAg/CNT cleaves C-C bond of glycerol more effectively than Pd/CNT. 4 ABSTRACTSPdAg supported on carbon nanotubes (PdAg/CNT) with an average particle size of 2.7 nm is prepared by an aqueous phase reduction method for alcohol oxidation reaction in direct alcohol fuel cells. In a half-cell system with three electrodes, the peak mass activity of PdAg/CNT reaches 0.105 mA µg Pd -1 , 0.305 mA µg Pd -1 , 2.105 mA µg Pd -1 , and 8.53 mA µg Pd -1 for methanol oxidation reaction, ethanol oxidation reaction, ethylene glycol oxidation reaction, and glycerol oxidation reaction, respectively, in 1 M KOH 0.1 M alcohol electrolyte. These values are higher than the mass activity of Pd/CNT at the same applied potential. With PdAg/CNT (0.5 mg Pd per MEA -1 ) as an anode catalyst, a direct methanol fuel cell, a direct ethanol fuel cell, a direct ethylene glycol fuel cell and a direct glycerol fuel cell achieve peak power densities of 135.1 mW cm -2 , 202.3 mW cm -2 , 245.2 mW cm -2 , and 276.2 mW cm -2 , with corresponding peak mass activities of 270.2 mW mg Pd per MEA -1 , 404.6 mW mg Pd per MEA -1 , 490.4 mW mg Pd per MEA -1 , and 552.4 mW mg Pd per MEA -1 , respectively, at 80 °C and ambient pressure. Ag has shown excellent activity towards aldehyde (formaldehyde, acetaldehyde, and glyoxylate) oxidation, thus, the enhancement in alcohol oxidation on PdAg/CNT is proposed due to Ag's promotion of intermediate aldehyde oxidation. PdAg/CNT also improves the fuel efficiency of glycerol oxidation by contributing to the C-C bond cleavage of C 3 glycerol to C 2 oxalate.5

show abstract

mentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

PdAg/CNT catalyzed alcohol oxidation reaction for high-performance anion exchange membrane direct alcohol fuel cell (alcohol = methanol, ethanol, ethylene glycol and glycerol)

Benipal

Liang

et al. 2016

Applied Catalysis B: Environmental

162

View full text Add to dashboard Cite

show abstract

“…In addition, innumerable kinds of electrocatalyst supports have been designed in the last decades, for example, graphene, nanocarbon materials, carbon black, and polymers, and so forth owing to their abundant reserves and promising electrolytic performance . Among the various supporting materials, graphene is one of the most attractive support used for electrocatalysts.…”

Section: Introductionmentioning

confidence: 99%

“…[21][22][23] In addition, innumerable kinds of electrocatalyst supports have been designed in the last decades, for example, graphene, nanocarbon materials, carbon black, and polymers, and so forth owing to their abundant reserves and promising electrolytic performance. [24][25][26] Among the various supporting materials, graphene is one of the most attractive support used for electrocatalysts. Graphene is a novel individual in the carbon family discovered by Novoselov et al 27 in 2004 has opened a new chapter in the development of material science.…”

Section: Introductionmentioning

confidence: 99%

Nonprecious metal's graphene‐supported electrocatalysts for hydrogen evolution reaction: Fundamentals to applications

2019

View full text Add to dashboard Cite

Sustainable production of hydrogen is a hopeful requirement of a strategic future economy and development. Water splitting driven by electricity is a favorable pathway for renewable hydrogen production. This critical review highlighted recent efforts toward the development of the nanoscale synthesis of nonprecious metal's graphene‐supported electrocatalysts and their electrocatalytic features for remarkable hydrogen evolution reaction (HER). Different essential nonprecious metal's graphene‐supported electrocatalysts, including metal carbides, sulfides, phosphides, selenides, oxides, and nitrides are reviewed. In the exploration, attention is given to the strategies of activity enhancement, the synthetic approach, and the composition/structure electrocatalytic‐performance relationship of these HER electrocatalysts. We are hopeful that this review confers a new momentum to the rational design of remarkable performance nonprecious metal's graphene‐supported electrocatalysts and comprehensive guide for researchers to utilize the subject catalysts in regular water splitting.

show abstract

“…Omrani et al. prepared bimetallic Pd−Co nanoparticle supported on graphene oxide for ethanol electro‐oxidation. Konya et al.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Trimetallic Pt−Pd−Co Porous Nanostructures on Reduced Graphene Oxide by Galvanic Replacement: Application to Electrocatalytic Oxidation of Ethylene Glycol

Shahrokhian

Rezaee

2017

Electroanalysis

View full text Add to dashboard Cite

In present work, reduced graphene oxide nanosheets (rGO) decorated with trimetallic three‐dimensional (3D) Pt−Pd−Co porous nanostructures was fabricated on glassy carbon electrode (Pt−Pd−Co/rGO/GCE). First, GO suspension was drop‐casted on the electrode surface, then GO film reduction was carried out by cycling the potential in negative direction to form the rGO film modified GCE (rGO/GCE). Then, electrodeposition of the cobalt nanoparticles (CoNPs) as sacrificial seeds was performed onto the rGO/GCE by using cyclic voltammetry. Afterward, Pt−Pd−Co 3D porous nanostructures fabrication occurs through galvanic replacement (GR) method based on a spontaneous redox process between PtCl2, PdCl2, and CoNPs. The morphology and structure of the Pt−Pd−Co/rGO porous nanostructure film was characterized by scanning electron microscopy, energy dispersive spectroscopy and X‐ray diffraction method. The performance of the prepared electrode was investigated by various electrochemical methods including, cyclic voltammetry and electrochemical impedance spectroscopy. The electrocatalytic activity of the as‐prepared modified electrode with high surface areas was evaluated in anodic oxidation of ethylene glycol. The study on electrocatalytic performances revealed that, in comparison to various metal combinations in modified electrodes, trimetallic Pt−Pd−Co/rGO/GCE exhibit a lower onset potential, significantly higher peak current density, high durability and stability for the anodic oxidation of ethylene glycol. The excellent performances are attributed to the rGO as catalysts support and resulting synergistic effects of the trimetallic and appropriate characteristics of the resulted 3D porous nanostructures. Moreover, the influence of various concentrations of ethylene glycol, the potential scan rate and switching potential on the electrode reaction, in addition, long‐term stability have been studied by chronoamperometric and cyclic voltammetric methods.

show abstract

Investigation on ethanol electrooxidation via electrodeposited Pd–Co nanostructures supported on graphene oxide

Cited by 33 publications

References 55 publications

PdAg/CNT catalyzed alcohol oxidation reaction for high-performance anion exchange membrane direct alcohol fuel cell (alcohol = methanol, ethanol, ethylene glycol and glycerol)

PdAg/CNT catalyzed alcohol oxidation reaction for high-performance anion exchange membrane direct alcohol fuel cell (alcohol = methanol, ethanol, ethylene glycol and glycerol)

Nonprecious metal's graphene‐supported electrocatalysts for hydrogen evolution reaction: Fundamentals to applications

Fabrication of Trimetallic Pt−Pd−Co Porous Nanostructures on Reduced Graphene Oxide by Galvanic Replacement: Application to Electrocatalytic Oxidation of Ethylene Glycol

Contact Info

Product

Resources

About