Effect of CeO2 addition on the structure and activity of RuO2/γ-Al2O3 catalyst

Yang, Shaoxia; Feng, Yujie; Wan, Jiafeng; Zhu, Wanpeng; Jiang, Zhanpeng

doi:10.1016/j.apsusc.2004.11.013

Cited by 88 publications

(31 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Thus, a better interaction between ruthenium and ceria is envisaged when the latter's content is increased. Furthermore, this increase helped the oxygen in the gas to be adsorbed on the surface [15]. This adsorbed oxygen is the most active oxygen species, therefore, the activity of Ru x nCe10Al catalysts is higher than that of Ru x Al catalysts in CB oxidation.…”

Section: Resultsmentioning

confidence: 98%

Reactivity of Ru-based catalysts in the oxidation of propene and carbon black

et al. 2007

View full text Add to dashboard Cite

Section: Resultsmentioning

confidence: 98%

Reactivity of Ru-based catalysts in the oxidation of propene and carbon black

et al. 2007

View full text Add to dashboard Cite

“…As is well known, the O ad is related to active oxygen species (HO · ) which could improve the electrocatalytic efficiency for organics. 49 Therefore, the PbO 2 -0.5TiN electrode with higher proportion of O ad implied a stronger electrochemical oxidation capacity for organics, which could also account for the best performance for dye in this study. 2 electrodes, the leakage of Pb element etc.…”

Section: Cyclic Voltammograms (Cv) and Electrochemical Impedance Specmentioning

confidence: 88%

Fabrication and Characterization of a PbO₂-TiN Composite Electrode by Co-Deposition Method

Yan

2016

J. Electrochem. Soc.

View full text Add to dashboard Cite

An excellent PbO 2 electrode with high electrocatalytic activity and stability was successfully fabricated by doping TiN particles through co-deposition method (marked as PbO 2 -TiN). The morphology (SEM), crystalline structure (XRD), chemical state (XPS), electrochemical performances (CV and EIS) and stability (accelerated life test) were characterized. The results showed that TiN doping could obviously improve the surface morphology of the electrode, increase the electrode current response and reduce the electrode impedance. During the electrochemical oxidation process, the PbO 2 -0.5TiN electrode showed the best performance on degradation of Acid Red G and Methylene blue (the highest removal efficiency, the lowest energy consumption and minimum Pb dissolution). The proportion of adsorbed hydroxyl oxygen for PbO 2 -0.5TiN electrode was 78.75%, which was higher than that for PbO 2 electrode (68.95%). The accelerated service lifetime of PbO 2 -0.5TiN electrode was 302 h, which was more than 3 times longer than that of PbO 2 electrode (96 h). Furthermore, a likely deactivation mechanism for lifetime enhancement of PbO 2 -0.5TiN electrode was proposed. As an attractive and promising wastewater treatment technology, electrochemical oxidation treatment (EOT) has been applied in many fields 1-4 due to its flexibility, simplicity, high efficiency, mild condition, and environmental compatibility. [5][6][7] Anode plays an important role in the electrochemical oxidation process.8 Therefore, anodes with a high catalytic activity and long service life are desired. 9,10Some of the traditional DSA electrodes, such as Ti/RuO 2 and Ti/IrO 2 with good stability exhibit little weak electrochemical oxidation ability for organics due to the low oxygen evolution potential (OEP) and the cost are high due to the noble metals 5,11 . In addition, Ti/Sb-SnO 2 has been the research focus for its high oxygen evolution potential (OEP) and strong electrochemical oxidation ability. However, the short service life of the Ti/Sb-SnO 2 affects the degradation rate of pollutants. 12,13 In contrast, Ti/PbO 2 is a more promising metal oxide electrode widely used in practice due to its low cost, ease of synthesis, high electrocatalytic activity and chemical stability 14,15 . However, the leakage of Pb element in the electrolysis process may lead to the secondary water pollution. 16 Besides, the catalytic performance of the Ti/PbO 2 electrode still has room for improvement. Thus, several efforts have been devoted to further improve its performance in the electrochemical oxidation capability and stability, including inserting the middle layer, 17 . Based on the reports above mentioned, it can be concluded that an appropriate modification can effectively improve the performances of the electrode.Titanium nitride (TiN) is a kind of novel functional materials possessing considerable excellent characteristics such as high chemical and thermal stability, good electric conductivity, corrosion resistance, wear resistance and low cost [32][33][34] . Therefor...

show abstract

“…O ads contents on rare earth doped samples were much higher than that of the control, especially for Gd-doped electrode. The O ads is the most active oxygen species and plays an important role in oxidation process [32]. The increasing of the O ads implied that the catalytic activity of the Ti/Sb-SnO 2 anode would be considerably affected by rare earth doping.…”

Section: Xps Analysis Of Re-sb-sno 2 Coating Filmsmentioning

confidence: 99%