Binary PdM catalysts (M = Ru, Sn, or Ir) over a reduced graphene oxide support for electro-oxidation of primary alcohols (methanol, ethanol, 1-propanol) under alkaline conditions

Lim, Eun Ja; Kim, Young‐Min; Choi, Sung Mook; Lee, Seonhwa; Noh, Yuseong

doi:10.1039/c4ta06893a

Cited by 77 publications

(41 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This phenomenon was also observed for Pt-based [14,60], Pd-based [23], and Au-based [61] catalysts, which can be attributed to several possible reasons. First, particles smaller than 0.5 nm are hard to be recognized in TEM images but can be reflected by calculation based on XRD patterns.…”

Section: Resultssupporting

confidence: 51%

“…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

Section: Resultssupporting

confidence: 51%

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

“…[32] Such an alloy may reduce the Pd content and further enhance its catalytic activity.I na ddition, the Pd lattice becomes strainedw ith modulated electronic configuration, making more active sites to improve the Pdbased catalytic activity. [33] For instance, some bimetallic catalysts are such as Ru-Cu/biochar, [34] Pd-Ru/g-Al 2 O 3 , [35] RuPd@GO, [36] PdRu/RGO, [37] PdRu/C, [38,39] Ru@2Pd@Ru/C, [40] and Pd x Ru 1Àx /C, [41] which were adopted for both catalytic and electrocatalytic applications, showing as urprisingly superior activity,s tability with respectt ot heir single metal counterparts. It has been demonstrated that Pd catalysts show high catalytic activity for the reduction of Cr VI .R ui sp roved to greatlye nhance the catalytic properties of Pd through the bifunctional and electronic effect, in formica cid (HCOOH; FA)o xidation reaction.…”

Section: Introductionmentioning

confidence: 99%

Catalytic Activity of Bimetallic (Ruthenium/Palladium) Nano‐alloy Decorated Porous Carbons Toward Reduction of Toxic Compounds

Veerakumar

Salamalai

Dhenadhayalan

et al. 2019

Chemistry An Asian Journal

View full text Add to dashboard Cite

show abstract

“…However, electrode activity has recovery limitations. Despite this, several studies have reported that Pd-based electrodes exhibit high durability and superior electrical conductivity [26][27][28]. The advantage of four-component electrodes is that they involve a smaller amount of the precious metal Pd, which forms the binary system, and the other three components play a role in reducing the dispersion and stability of Pd.…”

Section: Introductionmentioning

confidence: 99%

Electrocatalytic Activity of Pd/Ir/Sn/Ta/TiO2 Composite Electrodes

et al. 2018

View full text Add to dashboard Cite

This study compared the electrolytic refining process using different commercial Pd-based electrodes. The Pd-based electrode had an Ir:Sn molar ratio of 1:1 and contained 10% tantalum on a titanium substrate. The palladium weight ratio varied from 0 g to 1.8 g, 4.7 g, 8.6 g, and 15.4 g. Electrolytic refining was investigated for the Pd-based electrode in 3 M of H 2 SO 4 . The interfacial microstructure and components of the substrate were investigated using energy-dispersive X-ray analysis, and the electrochemical properties of the materials were measured using cyclic voltammetry, linear scan voltammetry, electrochemical impedance spectroscopy, and accelerated life tests. Of all the tested Pd-based electrodes, those with a palladium loading weight of 8.6 g showed the highest and most stable electrode activity at 3 M of H 2 SO 4 , with a capacitance retention of 96% of its initial value. The accelerated life test results for the 8.6 g Pd-Ir-Sn-Ta/TiO 2 electrode showed a gradual slope with an efficiency of almost 100% at 1000 h in an aqueous solution of 3 M of H 2 SO 4 . After the test, the dissolved elements that caused resistance in the electrolyte increased with increasing palladium loading content. Thus, the 8.6 g Pd-Ir-Sn-Ta/TiO 2 electrode demonstrated the optimum composition in 3 M of H 2 SO 4 for electrolyte refining.

show abstract

Binary PdM catalysts (M = Ru, Sn, or Ir) over a reduced graphene oxide support for electro-oxidation of primary alcohols (methanol, ethanol, 1-propanol) under alkaline conditions

Abstract: High metal loaded (60 wt%) binary PdM (M = Ru, Sn, Ir) catalysts were synthesized on reduced graphene oxide (RGO) for the electro-oxidation of simple alcohols, such as methanol, ethanol, and 1-propanol.

Cited by 77 publications

References 47 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)

Catalytic Activity of Bimetallic (Ruthenium/Palladium) Nano‐alloy Decorated Porous Carbons Toward Reduction of Toxic Compounds

Electrocatalytic Activity of Pd/Ir/Sn/Ta/TiO2 Composite Electrodes

Contact Info

Product

Resources

About