Zeolite-templated IrxRu1−xO2 electrocatalysts for oxygen evolution reaction in solid polymer electrolyte water electrolyzers

Li, Guangfu; Song, Wei; Wang, Xunying; Li, Yongkun; Shao, Zhigang; Yi, Baolian

doi:10.1016/j.ijhydene.2012.08.087

Cited by 55 publications

(30 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The performance achieved with the present IrRuOx catalyst appears comparable to the best state of the art reported in the literature for similar mixed oxide catalysts [44,[57][58][59][60][61] despite a lower catalyst loading used in the present case. This is probably related to the high degree of purity of the present catalyst especially in the outermost surface layers.…”

Section: Resultssupporting

confidence: 81%

Nanosized IrOx and IrRuOx electrocatalysts for the O2 evolution reaction in PEM water electrolysers

Siracusano

Dijk

Payne-Johnson

et al. 2015

Applied Catalysis B: Environmental

243

130

View full text Add to dashboard Cite

Section: Resultssupporting

confidence: 81%

Nanosized IrOx and IrRuOx electrocatalysts for the O2 evolution reaction in PEM water electrolysers

Siracusano

Dijk

Payne-Johnson

et al. 2015

Applied Catalysis B: Environmental

243

130

View full text Add to dashboard Cite

“…[43][44][45][46]48,[62][63][64] In the majority of those studies, both activity and stability were estimated by studying currentpotential profiles. For instance, based on an accelerated corrosion test by detecting electrode end-of-life, Kötz and Stucki showed that in comparison to pure RuO 2 the corrosion rate of the mixed Ir-Ru oxide anodes is at least an order of magnitude lower.…”

Section: Discussionmentioning

confidence: 99%

On the Origin of the Improved Ruthenium Stability in RuO₂–IrO₂Mixed Oxides

Kasian

Geiger

Stock

et al. 2016

J. Electrochem. Soc.

114

View full text Add to dashboard Cite

High oxygen evolution reaction activity of ruthenium and long term stability of iridium in acidic electrolytes make their mixed oxides attractive candidates for utilization as anodes in water electrolyzers. Indeed, such materials were addressed in numerous previous studies. The application of a scanning flow cell connected to an inductively coupled plasma mass spectrometer allowed us now to examine the stability and activity toward oxygen evolution reaction of such mixed oxides in parallel. The whole composition range of Ir-Ru mixtures has been covered in a thin film material library. In the whole composition range the rate of Ru dissolution is observed to be much higher than that of Ir. Eventually, due to the loss of Ru, the activity of the mixed oxides approaches the value corresponding to pure IrO 2 . Interestingly, the loss of only a few percent of a monolayer in Ru surface concentration results in a significant drop in activity. Several explanations of this phenomenon are discussed. It is concluded that the herein observed stability of mixed Ir-Ru oxide systems is most likely a result of high corrosion resistance of the iridium component, but not due to an alteration of the material's electronic structure. Renewable primary energies such as solar energy, wind energy and ocean energy receive more and more attention and are increasingly installed around the world.1-3 It is anticipated that renewables will eventually replace traditional fossil fuel-burning and nuclear power plants. However, intermittent power supply of renewables means that energy needs to be buffered. Thereby, hydrogen produced by water electrolysis is considered as an ideal energy carrier to adjust the balance between the generation of power by renewable primary energy and energy demand for end-use.3-5 Currently, acidic proton exchange membrane water electrolysis (PEMWE) is considered as a promising technology for this purpose. However, the widespread use of PEMWE is hindered by high capital costs, low efficiency, and shortages related to performance deterioration with time. 6 In this connection the nature of electrocatalysts and the procedure of their production and application conditions play a critical role. Materials used as electrocatalysts must be as active as possible to improve efficiency, while at the same time they need to be stable to maintain this efficiency throughout the lifetime of the electrolyzer. This is especially critical for materials catalyzing the anodic oxygen evolution reaction (OER), because of the detrimental positive potential and highly corrosive acidic environment. Only a few catalysts are able to withstand these harsh conditions, while providing sufficient activity, conductivity and mechanical stability. In fact, only iridium oxide anodes are proven to provide the required longevity of operation. On the other hand, ruthenium shows the highest electrocatalytic activity toward this reaction. 7,8 During the last decades, the electrochemical and surface properties of anodes based on these metals and their oxides we...

show abstract

“…[26][27][28][29][30] This procedure permitted us to evaluate catalyst ageingd uring al ong-term test. One thousand cycles were applied to the electrode materials between0 .3 and 1.2 Vv ersus RHE in 0.5 mol L À1 H 2 SO 4 at 20 mV s À1 to observe the evolution of the current.…”

Section: Stability Testmentioning

confidence: 99%

Effect of Adding CeO₂ to RuO₂–IrO₂ Mixed Nanocatalysts: Activity towards the Oxygen Evolution Reaction and Stability in Acidic Media

et al. 2015

View full text Add to dashboard Cite

Trimetallic Ru‐, Ir‐, and Ce‐oxide materials were synthesized by using a hydrolysis method in ethanol medium and characterized to obtain information on their crystallographic structure, morphology, and chemical composition. Voltammetric measurements allowed us to evaluate the properties of these catalysts through the determination of their capacitance, active site number, and accessibility. The effect of cerium on the oxygen evolution reaction (OER) was also evaluated electrochemically and the catalytic layer stability was measured by using a repetitive cyclic voltammetry procedure. The catalysts stability in an acidic medium is not significantly affected by cerium addition. Moreover, the oxygen mobility in the ceria crystallographic structure may contribute to an enhanced electrocatalytic activity per active site. Tafel slope values were determined from electrochemical impedance spectroscopy fitting parameters and indicate the same OER rate‐determining step for mono‐, bi‐, and trimetallic catalysts.

show abstract

Zeolite-templated IrxRu1−xO2 electrocatalysts for oxygen evolution reaction in solid polymer electrolyte water electrolyzers

Cited by 55 publications

References 32 publications

Nanosized IrOx and IrRuOx electrocatalysts for the O2 evolution reaction in PEM water electrolysers

Nanosized IrOx and IrRuOx electrocatalysts for the O2 evolution reaction in PEM water electrolysers

On the Origin of the Improved Ruthenium Stability in RuO₂–IrO₂Mixed Oxides

Effect of Adding CeO₂ to RuO₂–IrO₂ Mixed Nanocatalysts: Activity towards the Oxygen Evolution Reaction and Stability in Acidic Media

Contact Info

Product

Resources

About

Zeolite-templated IrxRu1−xO2 electrocatalysts for oxygen evolution reaction in solid polymer electrolyte water electrolyzers

Cited by 55 publications

References 32 publications

Nanosized IrOx and IrRuOx electrocatalysts for the O2 evolution reaction in PEM water electrolysers

Nanosized IrOx and IrRuOx electrocatalysts for the O2 evolution reaction in PEM water electrolysers

On the Origin of the Improved Ruthenium Stability in RuO2–IrO2Mixed Oxides

Effect of Adding CeO2 to RuO2–IrO2 Mixed Nanocatalysts: Activity towards the Oxygen Evolution Reaction and Stability in Acidic Media

Contact Info

Product

Resources

About

On the Origin of the Improved Ruthenium Stability in RuO₂–IrO₂Mixed Oxides

Effect of Adding CeO₂ to RuO₂–IrO₂ Mixed Nanocatalysts: Activity towards the Oxygen Evolution Reaction and Stability in Acidic Media