Electro-oxidation competency of palladium nanocatalysts over ceria–carbon composite supports during alkaline ethylene glycol oxidation

Sankar, Sasidharan; Watanabe, Naoto; Anilkumar, Gopinathan M.; Nair, Balagopal N.; Sivakamiammal, Sailaja G.; Tamaki, Takanori; Yamaguchi, Takeo

doi:10.1039/c8cy02232a

Cited by 31 publications

(13 citation statements)

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“…XPS results prove that the improved activity, stability, and durability of the Pd-(SnO 2 @C)/C catalyst are mainly attributed to the electronic interaction between Pd and SnO 2 @C. Moreover, when comparing the catalytic activity of the Pd-(SnO 2 @C)/C catalyst with the Pd-based bimetallic and metal oxide catalysts in Figure S10 and Table S2, the studied Pd-(SnO 2 @C)/C catalyst still exhibits significantly enhanced EOR catalytic activity. According to the experimental results and results from previous research, − there are two synergistic effects between SnO 2 and Pd in the alcohol electro-oxidation reaction, which is illustrated in Figure .…”

Section: Resultsmentioning

confidence: 76%

“…In recent years, various Pd catalysts have been successfully explored, including monometallic Pd, − Pd-based alloys, − as well as Pd complex oxides, − which exhibit higher activity and stability for the alcohol oxidation reaction. Among all these catalysts, metal oxides are widely used as cocatalysts or catalyst carriers in DAFC. − For one thing, the defects and holes on the surface of the metal oxides cause the interaction between the noble metal particles and the metal oxides, which not only promotes the dispersion of the noble metal particles on its surface but also plays the role of anchoring the precious metal particles, thereby preventing the agglomeration of precious metals.…”

Section: Introductionmentioning

confidence: 99%

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Carbon Layer-Enhanced Electronic Interaction of Pd-SnO₂ Hybrid Catalyst with High Performance in DAFC

Tan

Chen

et al. 2019

ACS Appl. Energy Mater.

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Direct alcohol fuel cell technology (DAFC) has gained significant interest recently as it is a green energy technology with a low/zero pollution emission. Nevertheless, the sluggish kinetics of the electrocatalysis process and the high cost of anode catalysts still impede the wide application of DAFC. Moreover, the limited understanding of the reaction mechanism restrains the development of anode catalysts. Here, we have prepared a Pd-(SnO 2 @C)/C catalyst and highlighted a strategy to demonstrate the effects of active oxygen-contained species and electronic interaction, which are identified to have a synergistic effect. The as-prepared Pd-(SnO 2 @C)/C catalyst showed remarkable activity and stability for EOR and MOR in alkaline media. It also had an encouraging performance in a polymer fiber membrane-based alkaline DAFC, where a NiCo 2 O 4 catalyst was used for the oxygen cathode. Combined with the theoretical analysis and the experimental research results, this study reveals that the electronic interaction is the dominant mechanism in the synergistic effect, which provides theoretical guidance and technical support for the preparation of the next generation of high catalytic activity and high stability anode catalysts of DAFC.

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Section: Resultsmentioning

confidence: 76%

Section: Introductionmentioning

confidence: 99%

Carbon Layer-Enhanced Electronic Interaction of Pd-SnO₂ Hybrid Catalyst with High Performance in DAFC

Tan

Chen

et al. 2019

ACS Appl. Energy Mater.

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“…39 Ethylene glycol is one important polyol with a series of merits, such as wide variety of sources, low vapor pressure as well as low toxicity. 40 A great many efforts have been made into the investigation of nanomaterials as catalyst towards the electrooxidation of ethylene glycol. 8,37,41 However, one limitation hinders the applicability of ethylene glycol as a fuel is lacking anode catalyst with high performance for efficient oxidation.…”

Section: Resultsmentioning

confidence: 99%

Raspberry-like Pd₃Pb alloy nanoparticles: superior electrocatalytic activity for ethylene glycol and glycerol oxidation

et al. 2020

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“…The electrochemical surface area of the catalysts (ECSA, Table 1) was calculated from the CV curves in Figure 2, considering the area under the large reduction current of PdO (peak IV) [14,29,42,43]. These ECSA values were obtained as follows:…”

Section: Structural Characterizationmentioning

confidence: 99%

Membrane-Less Ethanol Electrooxidation over Pd-M (M: Sn, Mo and Re) Bimetallic Catalysts

et al. 2021

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The effect of the addition of three oxophilic co-metals (Sn, Mo and Re) on the electrochemical performance of Pd in the ethanol oxidation reaction (EOR) was investigated by performing half-cell and membrane-less electrolysis cell experiments. While the additions of Sn and Re were found to improve significantly the EOR performance of Pd, Mo produced no significant promotional effect. When added in significant amounts (50:50 ratio), Sn and Re produced a 3–4 fold increase in the mass-normalized oxidation peak current as compared to the monometallic Pd/C material. Both the electrochemical surface area and the onset potential also improved upon addition of Sn and Re, although this effect was more evident for Sn. Cyclic voltammetry (CV) measurements revealed a higher ability of Sn for accommodating OH- species as compared to Re, which could explain these results. Additional tests were carried out in a membrane-less electrolysis system. Pd50Re50/C and Pd50Sn50/C both showed higher activity than Pd/C in this system. Chronopotentiometric measurements at constant current were carried out to test the stability of both catalysts in the absence of a membrane. Pd50Sn50/C was significantly more stable than Pd50Re50/C, which showed a rapid increase in the potential with time. Despite operating in the absence of a membrane, both catalysts generated a high-purity (e.g., 99.99%) hydrogen stream at high intensities and low voltages. These conditions could lead to significant energy consumption savings compared to commercial water electrolyzers.

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Electro-oxidation competency of palladium nanocatalysts over ceria–carbon composite supports during alkaline ethylene glycol oxidation

Abstract: The effect of varying Pd–CeO2 ratios on the oxidation efficiency of ethylene glycol and low molecular weight alcohols in alkaline medium.

Cited by 31 publications

References 50 publications

Carbon Layer-Enhanced Electronic Interaction of Pd-SnO₂ Hybrid Catalyst with High Performance in DAFC

Carbon Layer-Enhanced Electronic Interaction of Pd-SnO₂ Hybrid Catalyst with High Performance in DAFC

Raspberry-like Pd₃Pb alloy nanoparticles: superior electrocatalytic activity for ethylene glycol and glycerol oxidation

Membrane-Less Ethanol Electrooxidation over Pd-M (M: Sn, Mo and Re) Bimetallic Catalysts

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Electro-oxidation competency of palladium nanocatalysts over ceria–carbon composite supports during alkaline ethylene glycol oxidation

Abstract: The effect of varying Pd–CeO2 ratios on the oxidation efficiency of ethylene glycol and low molecular weight alcohols in alkaline medium.

Cited by 31 publications

References 50 publications

Carbon Layer-Enhanced Electronic Interaction of Pd-SnO2 Hybrid Catalyst with High Performance in DAFC

Carbon Layer-Enhanced Electronic Interaction of Pd-SnO2 Hybrid Catalyst with High Performance in DAFC

Raspberry-like Pd3Pb alloy nanoparticles: superior electrocatalytic activity for ethylene glycol and glycerol oxidation

Membrane-Less Ethanol Electrooxidation over Pd-M (M: Sn, Mo and Re) Bimetallic Catalysts

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Product

Resources

About

Carbon Layer-Enhanced Electronic Interaction of Pd-SnO₂ Hybrid Catalyst with High Performance in DAFC

Carbon Layer-Enhanced Electronic Interaction of Pd-SnO₂ Hybrid Catalyst with High Performance in DAFC

Raspberry-like Pd₃Pb alloy nanoparticles: superior electrocatalytic activity for ethylene glycol and glycerol oxidation