Electrical conduction mechanism and gas sensing properties of Pd-doped TiO2 films

Mardare, Diana; Iftimie, N.; Crışan, Maria; Răileanu, Mina; Yıldız, Abdullah; Coman, Tudor Bogdan; Pomoni, K.; Vomvas, A.

doi:10.1016/j.jnoncrysol.2011.01.035

Cited by 30 publications

(20 citation statements)

References 18 publications

(37 reference statements)

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“…Cyclic voltammogram of (a) rGO/GCE and (b) PdrGO/GCE in 0.1 M H 2 SO 4 at a scan rate of 5 mV s −1 .synthesis method of Pd-rGO catalyst synthesized in this work with those already reported[37][38][39][40][41][42][43][44][45] in literatures is shown in table 1. As shown, parameters are comparable with other results.To evaluate the electrochemical activity of rGO and PdrGO hybrid, cyclic voltammograms experiments were tested within a potential range from −0.3 to 1.2 V at a scanning rate of 50 mV s −1 in the solution of 0.1 M H 2 SO 4 .…”

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confidence: 92%

Sol–gel synthesis of palladium nanoparticles supported on reduced graphene oxide: an active electrocatalyst for hydrogen evolution reaction

CHEKIN

2015

Bull Mater Sci

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In this work, the synthesis and characterization of palladium nanoparticle-reduced graphene oxide hybrid (Pd-rGO) material is reported. Techniques of X-ray diffraction, transmission electron microscope (TEM), energy-dispersive X-ray, FT-IR spectroscopy, thermogravimetric analysis and cyclic voltammetry were used to characterize the structure and properties of the Pd-rGO. Results demonstrate the effect of Pd on the reduced GO. The average particle size of the Pd nanoparticles supported on rGO obtained from TEM is about 12-18 nm. Moreover, glassy carbon electrode (GCE) modified with palladium nanoparticle-graphene oxide hybrid (Pd-rGO/GCE) was prepared by casting of the Pd-rGO solution on GCE. The electrochemical and catalytic activity of the Pd-rGO/GCE was studied in 0.1 M H 2 SO 4 solution. The Pd-rGO/GCE electrode exhibited remarkable electrocatalytic activity for the hydrogen evolution reaction (HER). At potential more negative than −0.4 V vs. Ag|AgCl|KCl 3M , the current is mainly due to hydrogen evolution reaction. Finally, the kinetic parameters of hydrogen evolution reaction are also discussed on the Pd-rGO/GCE.

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confidence: 92%

Sol–gel synthesis of palladium nanoparticles supported on reduced graphene oxide: an active electrocatalyst for hydrogen evolution reaction

CHEKIN

2015

Bull Mater Sci

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“…1 Highly dispersed nanoparticles of noble metals, such as Pt, Pd, Rh, Ru and Au in mesoporous supports as titania, alumina, silica are widely used as catalysts in organic synthesis, petrochemistry, etc. In a study concerning the photocatalytic activity of noble-metal-loaded TiO 2 , [2][3][4][5][6][7][8] an ohmic contact is formed between the metal and semiconductor. Hence electrons can easily flow to the metal sites on TiO 2 under irradiation and the role of the metal is to act as an electron sink and thus to enhance the activity.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and spectroscopic characterization of palladium-doped titanium dioxide catalyst

Abd

2015

Bull Mater Sci

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In this work, we reported synthesis of palladium (Pd)-doped titanium dioxide (TiO 2)(Pd-TiO 2) nanoparticles by the sol-gel-assisted method. The synthesized Pd-doped TiO 2 nanoparticles were characterized using X-ray diffraction, transmission electronic microscopy, energy-dispersive spectroscopy, Fourier transform infrared (FT-IR) spectroscopy and voltammetry techniques. The analysis showed that particles are spherical in shape and pure anatase form with average size about 10 nm. To investigate the catalytic efficiency of Pd-TiO 2 nanoparticles, the hydrogen evolution reaction using the deposited film of Pd-TiO 2 nanoparticles on glassy carbon electrode (Pd-TiO 2 /GCE) was studied in 0.1 M H 2 SO 4 solution using linear scanning voltammetry. This study demonstrates the feasibility of using gelatin for the synthesis of Pd-TiO 2 catalyst.

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“…This mechanism can be determined by Debye shielding length (L D ) with equation (3). If L D <L/2, the potential barriers exist in the grain boundary region due to capture states at these interfaces 12 . Figure 2 shows the X-ray diffractograms of the samples.…”

Section: Methodsmentioning

confidence: 99%

Magnetic and Electrical Properties of MnxCu1-xFe2O4 Ferrite

et al. 2016

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In the present work, mixed manganese-copper ferrite of composition Mn x Cu 1-x Fe 2 O 4 (within x=0. 40, 0.42, 0.44, 0.46, 0.48 and 0.50) have been investigated for their electric and magnetic properties such as dc resistivity, Curie temperature, saturation magnetization. Mn x Cu 1-x Fe 2 O 4 ferrite samples were prepared by uniaxial pressing from the oxide mixture, synthesized at 1000°C during 45 hours and finally heated to 1200°C by 5h, at room atmosphere. The X-ray diffractograms show that the samples with different compositions were formed by compact structure spinel with cubic cell. The saturated magnetization of the Mn x Cu 1-x Fe 2 O 4 ferrites increased with x up to 0.46, which presented the smallest coercitive field. All samples showed hysteresis characteristic of soft magnetic materials. This electrical behavior is compatible with an insulator. The results were analyzed in the framework of grain/barrier model.

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Electrical conduction mechanism and gas sensing properties of Pd-doped TiO2 films

Cited by 30 publications

References 18 publications

Sol–gel synthesis of palladium nanoparticles supported on reduced graphene oxide: an active electrocatalyst for hydrogen evolution reaction

Sol–gel synthesis of palladium nanoparticles supported on reduced graphene oxide: an active electrocatalyst for hydrogen evolution reaction

Synthesis and spectroscopic characterization of palladium-doped titanium dioxide catalyst

Magnetic and Electrical Properties of MnxCu1-xFe2O4 Ferrite

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