Glycerol electrooxidation on highly active Pd supported carbide/C aerogel composites catalysts

Zhang, Xiaofei; Shen, Pei Kang

doi:10.1016/j.ijhydene.2012.11.119

Cited by 30 publications

(24 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The face-centered cubic (FCC) structured Pt/CNT, Au/CNT, Pd/CNT, , calculated using the full width half maximum (FWHM) method at the Gaussian-fitted (220) peaks using Scherrer's equation. Earlier researchers successfullyprepared Pd/C[53], Pd-S-HCNF[54], Pd/CNT[55], Pd@WC-Mo2C/C[56], PdSb 0.15 /C[21], PdNi/C[57], PdAg/C[58], and PdAu/C[59] for AOR with mean crystallite sizes of 4.0 nm, 5.1 nm, 10.5 nm, 6.1 nm, 3.8 nm, 3.1 nm, 3.7 nm and 3.7 nm, respectively. The mean crystallite sizes of Pd/CNT and PdAg/CNT are further reduced to 2.0 nm and 2.3 nm in the current work by the aqueous phase reduction method without using surfactants.…”

mentioning

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

160

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: 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

160

View full text Add to dashboard Cite

show abstract

“…In comparison to the mass electroactivity of other Pd-based electrocatalysts [13,16,17,25], tested at the comparable conditions, the value obtained here, j f /m Pd = 720 mA mg −1 , is markedly higher (Table 2). A similar value for MA is communicated for Pd NPs supported on carbon powder [12] whereas markedly higher values were obtained when using complex binary carbide and carbon aerogel composites as support for Pd [12]. No data for the stability of the catalyst were presented in the latter case.…”

Section: Resultsmentioning

confidence: 62%

“…Much effort is put into the development of various Pd-based electrocatalytic materials [5][6][7][8][9][10][11][12][13][14][15][16][17][18] due to the prospect to reduce the platinum content in fuel cells. Comparative studies of Pt-and Pd-supported nanoparticles (NPs) have shown that the onset potential for glycerol oxidation is lower on Ptbased catalysts, but nevertheless, in specific experimental conditions, higher oxidation currents are observed on Pd-based materials [8,10].…”

Section: Introductionmentioning

confidence: 99%

“…Further improvements in terms of electrocatalytic activity were sought by combining Pd with other metals, e.g., Au and Ni [7] or adatoms of Sb, Pb, and Sn [15]. Apart from the metal catalytic centers, the catalyst support is also of utmost importance for the stability and effectiveness of the electrocatalytical performance [6,11,12,17]. Conducting polymers (CP) present one of the possibilities for using supports with high conductivity and well-developed surface area.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Pd-modified PEDOT layers obtained through electroless metal deposition—electrooxidation of glycerol

Ilieva

Nakova

Tsakova

2016

J Solid State Electrochem

View full text Add to dashboard Cite

Pd-poly(3,4-ethylenedioxythiophene) (PEDOT)-based electrocatalytic materials are obtained by coupling Pd ion reduction with oxidation of pre-reduced PEDOT coatings. Electroless metal deposition is carried out in single or triple electroless deposition steps resulting in Pd NPs with mean size ranging between 12 and 22 nm, respectively. The proposed method of dispersing the Pd catalytic phase provides the opportunity to obtain high electrocatalytic currents with Pd loadings as low as 10 μg cm −2 . The Pd-PEDOT catalyst obtained by triple-step metal deposition shows stable voltammetric behavior with respect to glycerol oxidation in alkaline solution. The established mass activity is between the highest values achieved at Pd-electrocatalysts without involving additional electrocatalytic materials or special supports.

show abstract

“…However, high price and limited supply of Pt are major barriers to the development of the DAFCs using the Pt-based catalysts. Our previous work and other groups' work on the development of Pt-free electrocatalysts for alcohol oxidation has focused on Pd-based electrocatalysts and the results revealed that Pd is a good electrocatalyst for glycerol oxidation in alkaline medium [11][12][13][14][15][16]. However, the price of Pd also is expensive.…”

Section: Introductionmentioning

confidence: 99%

Oxide (Co3O4, NiO, Mn3O4, MgO) promoted Au/C catalyst for glycerol electrooxidation in alkaline medium

Zhong

et al. 2015

Materials Research Bulletin

View full text Add to dashboard Cite

Glycerol electrooxidation on highly active Pd supported carbide/C aerogel composites catalysts

Cited by 30 publications

References 39 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)

Pd-modified PEDOT layers obtained through electroless metal deposition—electrooxidation of glycerol

Oxide (Co3O4, NiO, Mn3O4, MgO) promoted Au/C catalyst for glycerol electrooxidation in alkaline medium

Contact Info

Product

Resources

About