Nanoporous Pd/TiO2 composites prepared by one-step dealloying and their electrocatalytic performance for methanol/ethanol oxidation

Song, Yanyan; Wei, Caihua; Zhang, Xiaolong; Wei, Xin; Song, Xiaoping; Sun, Zhanbo

doi:10.1016/j.matchemphys.2015.05.030

Cited by 23 publications

(18 citation statements)

References 65 publications

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“…Unfortunately, it was difficult to identify the morphology of the phase-contained Ni of the dealloyed ribbons by TEM observation. The above results indicate that compared with the dealloyed Al-Pd ribbons [20], the microstructures of the dealloyed Al-Pd-Ni ribbons are not evolved evidently due to the addition of Ni. Fig.…”

Section: Electrochemical Measurementsmentioning

confidence: 76%

“…It is noticed that the content of PdO, as shown in Fig. 3(a), is decreased evidently compared with that of np-Pd [20].…”

Section: Electrochemical Measurementsmentioning

confidence: 87%

“…The preparation procedure of the precursor alloys is described according to our previous work [20]. Al 85Àx Pd 15 Ni x (x = 0, 0.1, 0.3, 0.5, 0.7, 1.0, at.%) alloys with nominal composition were prepared by an arc melting in high purity Ar atmosphere.…”

Section: Preparation Of Nanoporous Compositesmentioning

confidence: 99%

“…4 shows the CV curves of the np-Pd/NiO electrodes in a 0.5 M KOH solution. In order to make the comparison more convincing, the CV curve of np-Pd [20] was redrawn (Fig. 4).…”

Section: Microstructural Characterization Of the Np-pd/nio Compositesmentioning

confidence: 99%

“…The preparation of oxide promoted Pd electrocatalysts has been focused on for alcohol oxidation, which has been proven to be an effective way to combine the merits of individual components [18,19]. In our previous work, TiO 2 has been successfully formed in np-Pd by a simple one-step dealloying in a NaOH solution, and adding a small amount of TiO 2 in np-Pd can significantly promote the electrocatalytic activity towards methanol/ethanol oxidation compared to np-Pd [20].…”

Section: Introductionmentioning

confidence: 99%

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Electrocatalytic performance for methanol oxidation on nanoporous Pd/NiO composites prepared by one-step dealloying

Song

Zhang

Yang

et al. 2016

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Section: Electrochemical Measurementsmentioning

confidence: 76%

“…It is noticed that the content of PdO, as shown in Fig. 3(a), is decreased evidently compared with that of np-Pd [20].…”

Section: Electrochemical Measurementsmentioning

confidence: 87%

Section: Preparation Of Nanoporous Compositesmentioning

confidence: 99%

“…4 shows the CV curves of the np-Pd/NiO electrodes in a 0.5 M KOH solution. In order to make the comparison more convincing, the CV curve of np-Pd [20] was redrawn (Fig. 4).…”

Section: Microstructural Characterization Of the Np-pd/nio Compositesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Electrocatalytic performance for methanol oxidation on nanoporous Pd/NiO composites prepared by one-step dealloying

Song

Zhang

Yang

et al. 2016

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Ethanol Oxidation Reaction Catalyzed by Palladium Nanoparticles Supported on Hydrogen‐Treated TiO₂ Nanobelts: Impact of Oxygen Vacancies

Yao

Roseman

et al. 2017

ChemElectroChem

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Nanocomposites based on palladium nanoparticles deposited onto TiO2 nanobelts were prepared by chemical reduction of Pd(II) precursors and the catalytic activity towards ethanol oxidation reaction (EOR) was examined and compared within the context of TiO2 oxygen vacancies formed by thermal annealing at controlled temperatures (400–600 °C) in a hydrogen atmosphere. Transmission electron microscopic measurements showed that the Pd nanoparticles (about 5 nm in diameter) were clustered somewhat on the surfaces of hydrogen‐treated TiO2 nanobelts (Pd/hTiO2), but distributed rather evenly on the untreated ones (Pd/TiO2). X‐ray photoelectron spectroscopic studies suggested electron transfer from Ti to Pd in the Pd/hTiO2 samples, as compared to untreated Pd/TiO2, due to the formation of oxygen vacancies in TiO2 nanobelts where the concentration increased with increasing thermal annealing temperature, as evidenced in electron paramagnetic resonance measurements. Significantly, electrochemical measurements showed markedly enhanced EOR activity of both Pd/TiO2 and Pd/hTiO2 in alkaline media, as compared to commercial Pd/C, and the activity increased drastically with the concentration of oxygen vacancies, most likely because oxygen vacancies facilitated the formation of hydroxyl species on the TiO2 surface that played a critical role in the oxidation of ethanol to acetate.

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Synthesis of Layered Double Hydroxides and TiO₂ Supported Metal Nanoparticles for Electrocatalysis

et al. 2022

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In the present work, solution‐phase synthesis was employed to prepare two sets of catalysts with different transition metals as active sites. One set contained Au or Pd supported on TiO2 (Au−TiO2, Pd−TiO2), whereas the other set contained layered double hydroxides (NiFe‐LDH and CuFe‐LDH). The electrocatalytic performance of these composite materials was investigated by cyclic voltammetry (CV) using a model compound 4‐nitrophenol (4‐NP). Composite materials were characterized by various analytical techniques to gain insight into the catalysts active sites. The morphology and structure of the prepared samples were investigated by X‐ray diffraction, attenuated total reflectance Fourier transform infrared, X‐ray photoelectron spectroscopy, transmission scanning electron microscope, and field emission scanning electron microscope. Metal nanoparticles loading on TiO2 was measured by inductively coupled plasma – optical emission spectrometry. CV measurements were performed in acetonitrile solution containing 0.1 m tetrabutylammonium hexafluorophosphate (TBAPF6) and 1 mm 4‐NP. Among all dioxides (Au−TiO2, Pd−TiO2) and hydroxides (NiFe‐LDH and CuFe‐LDH) studied, Pd−TiO2 shows the lowest onset potential (−0.32 V vs. Ag/AgCl) for the electrocatalytic reduction of 4‐NP. This is the first comparative study of such materials for 4‐NP electrocatalysis in aprotic solvent, thus demonstrating the suitability of dioxide and hydroxide based materials as electrocatalysts.

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Nanoporous Pd/TiO2 composites prepared by one-step dealloying and their electrocatalytic performance for methanol/ethanol oxidation

Cited by 23 publications

References 65 publications

Electrocatalytic performance for methanol oxidation on nanoporous Pd/NiO composites prepared by one-step dealloying

Electrocatalytic performance for methanol oxidation on nanoporous Pd/NiO composites prepared by one-step dealloying

Ethanol Oxidation Reaction Catalyzed by Palladium Nanoparticles Supported on Hydrogen‐Treated TiO₂ Nanobelts: Impact of Oxygen Vacancies

Synthesis of Layered Double Hydroxides and TiO₂ Supported Metal Nanoparticles for Electrocatalysis

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Nanoporous Pd/TiO2 composites prepared by one-step dealloying and their electrocatalytic performance for methanol/ethanol oxidation

Cited by 23 publications

References 65 publications

Electrocatalytic performance for methanol oxidation on nanoporous Pd/NiO composites prepared by one-step dealloying

Electrocatalytic performance for methanol oxidation on nanoporous Pd/NiO composites prepared by one-step dealloying

Ethanol Oxidation Reaction Catalyzed by Palladium Nanoparticles Supported on Hydrogen‐Treated TiO2 Nanobelts: Impact of Oxygen Vacancies

Synthesis of Layered Double Hydroxides and TiO2 Supported Metal Nanoparticles for Electrocatalysis

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Product

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Ethanol Oxidation Reaction Catalyzed by Palladium Nanoparticles Supported on Hydrogen‐Treated TiO₂ Nanobelts: Impact of Oxygen Vacancies

Synthesis of Layered Double Hydroxides and TiO₂ Supported Metal Nanoparticles for Electrocatalysis