Platinum catalysed nanoporous titanium dioxide electrodes in H2SO4 solutions

Hayden, Brian E.; Malevich, Dzmitry; Pletcher, Derek

doi:10.1016/s1388-2481(01)00182-5

Cited by 66 publications

(55 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The anodic part of the two first cycles indicates the electrode deactivation. This is in line with earlier workers [5,14], who attributed this phenomenon to surface fouling by an adherent film generated by polymerisation of phenoxy radicals produced in the oxidation. The influence of the phenol concentration ( Figure 1b) and the typical triangular trend of the voltammograms suggest that the early deactivation occurs through the adsorption of the anodic products on the electrode active sites.…”

Section: Resultssupporting

confidence: 93%

Deactivation and regeneration of Pt anodes for the electro-oxidation of phenol

et al. 2005

View full text Add to dashboard Cite

Electro-oxidation tests with different electrolytes (Na 2 SO 4 , NaCl, H 2 SO 4 ) and anode types (Pt, Ti lined with Ir and Ta oxides, PbO 2 , activated carbon) were performed on aqueous solutions containing phenol to assess the mechanism and nature of electrode deactivation phenomena. For the Pt electrode, the nature of the electro-deposited organic species was investigated by ATR-FTIR and FESEM-EDS analyses, which showed adsorption of intermediate oxidation products (e.g. benzoquinone, hydroquinone) is likely responsible for the early deactivation stages. Conversely, in the longer term, formation of polymeric films is promoted. Potentiostatic tests showed that anode regeneration can be achieved by anodic polarisation above 1.1 V (vs Hg/Hg 2 SO 4 ). This reactivation was found to be easier in the presence of significant amounts of chloride ions. Conversely, the deactivated state is maintained for the Ti/IrO 2 /Ta 2 O 5 electrode even though anodic polarisation at high positive potentials is applied. Cyclic voltammetric curves on PbO 2 electrodes did not provide satisfactory results as the intensity of the leaddioxide reduction peak was so high that peaks for phenol oxidation were hardly detectable. Finally, the activated carbon based electrode was found to be promising as it enables simultaneous adsorption of the organic pollutant and oxidation of the pollutant itself to constitute a sort of self-regenerating adsorber unit.

show abstract

Section: Resultssupporting

confidence: 93%

Deactivation and regeneration of Pt anodes for the electro-oxidation of phenol

et al. 2005

View full text Add to dashboard Cite

show abstract

“…One specific feature of TiO 2 relevant to this study is that TiO 2 can act as catalyst supports and change the electronic property of the supported metal nanoparticles [11]. The strong interaction between TiO 2 and Pt has been found to favor the catalytic activities for methanol electro-oxidation [12][13][14]. In addition, the forms of TiO 2 supports were shown to greatly affect this interaction: usually the TiO 2 support in nanotube form can yield better catalytic properties than those in nanoparticle form [15][16][17].…”

Section: Introductionmentioning

confidence: 95%

Low-Pt Content Carbon-Supported Pt–Ni–TiO2 Nanotube Electrocatalyst for Direct Methanol Fuel Cells

Jiang

Shen

et al. 2008

Catal Lett

View full text Add to dashboard Cite

Low-Pt content (5%) carbon-supported Pt-NiTiO 2 nanotube electrocatalysts were prepared via a microwave-assisted polyol strategy. Physical and morphological properties of these electrocatalysts were characterized by X-ray diffraction (XRD), high resolution transmission electron microscope (HRTEM), and energy dispersive X-ray spectroscopy (EDX). Cyclic voltammetry and chronoamperometry studies clearly suggested that the Pt(5%)-Ni(10%)-TiO 2 nanotube (10%) supported by Vulcan XC-72 is better than the commercial 20% Pt/C electrocatalyst for methanol electro-oxidation in direct methanol fuel cells (DMFCs).

show abstract

“…Moreover, it shows good stability in acidic solution, and TiO 2 electrode has been utilized as the support of Pt [2] or Pt-Ru [3]. Thus, platinized titanium anodes have possessed suitable properties for applications in electrochemical technology.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of TiO2 hollow spheres using binary ionic liquids as an electrocatalyst

Hong

Yoo

2011

Res Chem Intermed

View full text Add to dashboard Cite

Titanium dioxide (TiO 2 titania) hollow sphere was simply synthesized using various ionic liquids (ILs). The shape and size of TiO 2 particles were significantly different with the composition of ILs. This is mainly attributed to the interaction between organic solvent and IL at the interface leading to the formation of sphere. Among the binary ILs, [Bmim][BF 4 ] ? [Omim][PF 6 ], [Bmim][B-F 4 ] ? [Omim][PF 6 ], and [Bmim][PF 6 ] ? [Hmim][PF 6 ] were useful to prepare TiO 2 nanostructures with high surface area and anatase phase. Especially, [Bmim][B-F 4 ] ? [Omim][PF 6 ] was the most effective IL to synthesize an anatase TiO 2 hollow sphere.

show abstract

Platinum catalysed nanoporous titanium dioxide electrodes in H2SO4 solutions

Cited by 66 publications

References 12 publications

Deactivation and regeneration of Pt anodes for the electro-oxidation of phenol

Deactivation and regeneration of Pt anodes for the electro-oxidation of phenol

Low-Pt Content Carbon-Supported Pt–Ni–TiO2 Nanotube Electrocatalyst for Direct Methanol Fuel Cells

Synthesis of TiO2 hollow spheres using binary ionic liquids as an electrocatalyst

Contact Info

Product

Resources

About