Carbon-supported Pd–Cr electrocatalysts for the electrooxidation of formic acid that demonstrate high activity and stability

Wen, Wenjuan; Li, Chunyou; Li, Wenpeng; Tian, Yan

doi:10.1016/j.electacta.2013.07.137

Cited by 49 publications

(32 citation statements)

References 45 publications

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“…The Pd/C and oxide-rich PdCu/C catalysts with the appropriate alloy composition and a metal loading of 20 wt% were prepared by chemical reduction with NaBH 4 as a reducing agent that we have used before [80,94]. Briefly, we prepared the carbon mixture with carbon black and triple-distilled water according to the proportion of 160 mg:100 mL and agitated under ultrasonication for 30 min.…”

Section: Preparation Of the Catalystsmentioning

confidence: 99%

“…In the Cu 2p range (Figure 4b), the peak at 932.1 eV corresponds to zero-valent copper, while the peaks The X-ray photoelectron spectroscopy (XPS) [78,79] was used to further explore the chemical states and surface compositions of Pd/C and oxide-rich Pd 0.9 Cu 0.1 /C catalysts ( Figure 4). All the XPS curves are fitted by the Gaussian-Lorentzian (20% Gaussian) method after background subtraction using Shirley's method [80]. Figure 4a is composed of Pd 3d signal.…”

Section: Materials Characterizationmentioning

confidence: 99%

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Carbon Supported Oxide-Rich Pd-Cu Bimetallic Electrocatalysts for Ethanol Electrooxidation in Alkaline Media Enhanced by Cu/CuOx

Guo

Liu

et al. 2016

Catalysts

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Different proportions of oxide-rich PdCu/C nanoparticle catalysts were prepared by the NaBH 4 reduction method, and their compositions were tuned by the molar ratios of the metal precursors. Among them, oxide-rich Pd 0.9 Cu 0.1 /C (Pd:Cu = 9:1, metal atomic ratio) exhibits the highest electrocatalytic activity for ethanol oxidation reaction (EOR) in alkaline media. X-ray photoelectron spectroscopy (XPS) and high resolution transmission electron microscopy (HRTEM) confirmed the existence of both Cu and CuO x in the as-prepared Pd 0.9 Cu 0.1 /C. About 74% of the Cu atoms are in their oxide form (CuO or Cu 2 O). Besides the synergistic effect of Cu, CuO x existed in the Pd-Cu bimetallic nanoparticles works as a promoter for the EOR. The decreased Pd 3d electron density disclosed by XPS is ascribed to the formation of CuO x and the spill-over of oxygen-containing species from CuO x to Pd. The low Pd 3d electron density will decrease the adsorption of CH 3 CO ads intermediates. As a result, the electrocatalytic activity is enhanced. The onset potential of oxide-rich Pd 0.9 Cu 0.1 /C is negative shifted 150 mV compared to Pd/C. The oxide-rich Pd 0.9 Cu 0.1 /C also exhibited high stability, which indicated that it is a candidate for the anode of direct ethanol fuel cells (DEFCs).

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Section: Preparation Of the Catalystsmentioning

confidence: 99%

Section: Materials Characterizationmentioning

confidence: 99%

Carbon Supported Oxide-Rich Pd-Cu Bimetallic Electrocatalysts for Ethanol Electrooxidation in Alkaline Media Enhanced by Cu/CuOx

Guo

Liu

et al. 2016

Catalysts

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“…It is well established that the positive shift of Pd 3d relates to a lowering of the Fermi level or an increase of d-vacancy at the valence bond (3d orbital), resulting in a weaker adsorption strength between the Pd surface and the adsorption species due to the decreased electron back-donation from the Pd surface to the antibonding level of adsorbed molecule based on d-band center theory [38][39]. Similar results have been extensively reported in the Pd-based catalysts in literature [29,[40][41]. Fig.…”

Section: Xrd Tem and Xps Analysesmentioning

confidence: 54%

“…Moreover, the onset potential decreases from -0.108 V for Pd/C to -0.155 V for Pd/RuO 2 -SnO 2 /C. The negative shift of the onset potential also indicates that Pd/RuO 2 -SnO 2 /C have a higher catalytic activity for CO oxidation, which can be attributed to the reduced adsorption strength between the Pd surface and the adsorption species [29,[38][39], due to the presence of (Ru,Sn)O 2 solid solution (in Fig. 3).…”

Section: Electrochemical Analysesmentioning

confidence: 84%

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A New Composite Support for Pd Catalysts for Ethylene Glycol Electrooxidation in Alkaline Solution: Effect of (Ru,Sn)O2 solid solution

Huang

Tang

et al. 2015

Electrochimica Acta

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Preparation of FePd‐RGO Bimetallic Composites with High Catalytic Activity for Formic Acid Electro‐Oxidation

2016

Chin. J. Chem.

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FePd-RGO composites through the growth of uniformly dispersed iron-palladium bimetallic nanoparticles (NPs) on reduced graphene oxide (RGO) nanosheets were prepared by a two-step method. The firstly formed Fe is used as the seed for the subsequent Pd growth. The formation of Fe NPs on RGO in the first step is performed by an in-situ reduction reaction with the reducer ethylene glycol under oil bath at 180 ℃. NPs in the as-prepared FePd-RGO have an average particle size of 6.5 nm, and Pd is added to one side of Fe which leads to the formation of Fe-Pd bimetallic interfaces. As compared with the commercial Pd black at the same loading, the composites have higher electro-catalytic activity, better electrochemical stability and higher resistance to CO poisoning for formic acid electro-oxidation. Figure 1 (a) TEM image of Fe-RGO; (b) TEM image of FePd-RGO with the corresponding local magnified image, and (c) HRTEM image of (b). Insets (a) and (c) are the corresponding SAED patterns, respectively. Preparation of FePd-RGO Bimetallic Composites with High Catalytic Activity Chin.

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Carbon-supported Pd–Cr electrocatalysts for the electrooxidation of formic acid that demonstrate high activity and stability

Cited by 49 publications

References 45 publications

Carbon Supported Oxide-Rich Pd-Cu Bimetallic Electrocatalysts for Ethanol Electrooxidation in Alkaline Media Enhanced by Cu/CuOx

Carbon Supported Oxide-Rich Pd-Cu Bimetallic Electrocatalysts for Ethanol Electrooxidation in Alkaline Media Enhanced by Cu/CuOx

A New Composite Support for Pd Catalysts for Ethylene Glycol Electrooxidation in Alkaline Solution: Effect of (Ru,Sn)O2 solid solution

Preparation of FePd‐RGO Bimetallic Composites with High Catalytic Activity for Formic Acid Electro‐Oxidation

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