Electrochemical surface characterization of IrO2 + SnO2 mixed oxide electrocatalysts

Pauli, Carlos P. De; Trasatti, S.

doi:10.1016/0022-0728(95)03950-l

Cited by 237 publications

(168 citation statements)

References 23 publications

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“…The predominant influence of IrO 2 on the voltammetric response of the electrode is indicated by the anodic-to-cathodic charge ratio (Qa/Qc) being close to unity [28]. In the present study this charge was integrated for the potential range between 0.4 and 1.2 V, where the polarisation curve is not influenced by gas evolution reactions or adsorption processes.…”

Section: Cyclic Voltammetrymentioning

confidence: 80%

Tantalum carbide as a novel support material for anode electrocatalysts in polymer electrolyte membrane water electrolysers

Polonský

Petrushina

Christensen

et al. 2012

International Journal of Hydrogen Energy

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Section: Cyclic Voltammetrymentioning

confidence: 80%

Tantalum carbide as a novel support material for anode electrocatalysts in polymer electrolyte membrane water electrolysers

Polonský

Petrushina

Christensen

et al. 2012

International Journal of Hydrogen Energy

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“…This inevitably increases the cost of the technology and delays its introduction to the market. Most of the approaches have concentrated on combining IrO 2 with lower-cost materials such as SnO 2 (51) C (54). It is thought that mainly by diluting the noble metal content, the metal oxide contributes to the stability of the noble metal particles against degradation.…”

Section: Introductionmentioning

confidence: 99%

Graphitic Carbon Nitride Materials for Energy Applications

et al. 2015

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Polymeric layered carbon nitrides were investigated for use as catalyst support materials for proton exchange membrane fuel cells (PEMFCs) and water electrolyzers (PEMWEs). Three different carbon nitride materials were prepared: a heptazine-based graphitic carbon nitride material (gCNM), poly (triazine) imide carbon nitride intercalated with LiCl component (PTI-Li+Cl-) and boron-doped graphitic carbon nitride (B-gCNM). Following accelerated corrosion testing, all graphitic carbon nitride materials were found to be more electrochemically stable compared to conventional carbon black (Vulcan XC-72R) with B-gCNM support showing the best stability. For the supported Pt, Pt/PTI-Li+Cl- exhibited the best durability with only 19% electrochemical surface area (ECSA) loss versus 36% for Pt/Vulcan. Superior methanol oxidation activity was observed for all gCNM supported Pt catalysts on the basis of the catalyst ECSA. Preliminary results on IrO2 supported on gCNM using a PEMWE cell revealed an enhancement in the charge-transfer resistance as the current density increases when compared to unsupported IrO2. This may be attributed to a higher active surface area of the catalyst nanoparticles on the gCNM support.

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“…As it can be found in Figure 8, in the potential region between 0.4 and 1.2 V vs. SCE, the anodic and cathodic parts of the voltammogramm present quite high degree of reversibility. Generally, for investigation of such system, the reversibility value of Q a /Q c can be implemented to assess the contribution of the second component in the mixed electrocatalyst, as the Q a /Q c ratio is expected to be close to unity (7). Figure 9 represents the summarized results of the Q a /Q c ratio vs. the composition of ECS Transactions, 41 (42) 115-124 (2012) …”

Section: Electrochemical Characterizationmentioning

confidence: 99%

Development of Refractory Ceramics for the Oxygen Evolution Reaction (OER) Electrocatalyst Support for Water Electrolysis at Elevated Temperatures

et al. 2012

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Commercial TaC and Si3N4 powders were tested as possible electrocatalyst support materials for the Oxygen Evolution Reaction (OER) for PEM water electrolysers, operating at elevated temperatures. TaC and Si3N4 were characterised by thermogravimmetric and differential thermal analysis for their thermal stability. The Adams fusion method was implemented to deposit IrO2 on the support surfaces. A series of electrocatalysts was prepared with a composition of (IrO2)x(TaC/ Si3N4)1-x,where x represents the mass fraction of IrO2 and was equal to 0.1 (only for TaC), 0.3, 0.5, 0.7, 0.9 and 1. The thin-film method was used for electrochemical analysis of the prepared electrocatalysts. SEM-EDX, BET and powder conductivity measurements were used as complementary techniques to complete characterisation of the electrocatalysts. Additionally, they were compared in their properties with previously reported data for a SiC-Si support. The stability of the electrocatalysts was assessed by estimation of reversibility of the anodic/cathodic processes.

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Electrochemical surface characterization of IrO2 + SnO2 mixed oxide electrocatalysts

Cited by 237 publications

References 23 publications

Tantalum carbide as a novel support material for anode electrocatalysts in polymer electrolyte membrane water electrolysers

Tantalum carbide as a novel support material for anode electrocatalysts in polymer electrolyte membrane water electrolysers

Graphitic Carbon Nitride Materials for Energy Applications

Development of Refractory Ceramics for the Oxygen Evolution Reaction (OER) Electrocatalyst Support for Water Electrolysis at Elevated Temperatures

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