RuxNb1−xO2 catalyst for the oxygen evolution reaction in proton exchange membrane water electrolysers

Puthiyapura, Vinod Kumar; Pasupathi, Sivakumar; Basu, Suddhasatwa; Wu, Xiaoyin; Su, Huaneng; Varagunapandiyan, N.; Pollet, Bruno G.; Scott, Keith

doi:10.1016/j.ijhydene.2013.04.100

Cited by 50 publications

(52 citation statements)

References 36 publications

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“…For IrRuO x /Nb-TNT the destabilization is lower and 63% of the total catalyst active sites were still active after the OER. Similar stabilizing effect of Nb addition to titania and Ru-based oxide electrodes has also been reported before in the literature [22,25,27,[52][53][54] . Better stability is found for IrO 2 /Nb-TNT, http://engine.scichina.com/doi/10.1016/j.jechem.2019.03.008 which keeps about 87% of the total charge, with some loss in the outer and in the inner charge values that are significantly higher than those for unsupported IrO 2 and therefore, the Nb-TNTs support has a stabilizing effect on IrO 2 .…”

Section: Catalystsupporting

confidence: 86%

Supporting IrO2 and IrRuO nanoparticles on TiO2 and Nb-doped TiO2 nanotubes as electrocatalysts for the oxygen evolution reaction

Genova-Koleva

Alcaide

Álvarez

et al. 2019

Journal of Energy Chemistry

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Section: Catalystsupporting

confidence: 86%

Supporting IrO2 and IrRuO nanoparticles on TiO2 and Nb-doped TiO2 nanotubes as electrocatalysts for the oxygen evolution reaction

Genova-Koleva

Alcaide

Álvarez

et al. 2019

Journal of Energy Chemistry

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“…Beside Ni, many other cations have been used to optimize the catalytic OER performance of Ru and Ir oxide catalysts by the formation of mixed oxides. In case of Ru oxide, mixtures with La, Ce, Ti, Nb, Ta, Pb, Sn, Co, Zn, Pt and Fe were reported to improve the OER performance. Considering Ir oxides, mixtures with Sn, Sb, Si, Ti, Nb, Ta or Co were reported and, hence, Ru and Ir oxides were mixed with rather similar components.…”

Section: Oer Catalystsmentioning

confidence: 99%

Electrocatalytic Oxygen Evolution Reaction in Acidic Environments – Reaction Mechanisms and Catalysts

Reier

Nong

Teschner

et al. 2016

Advanced Energy Materials

938

828

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The low efficiency of the electrocatalytic oxidation of water to O2 (oxygen evolution reaction‐OER) is considered as one of the major roadblocks for the storage of electricity from renewable sources in form of molecular fuels like H2 or hydrocarbons. Especially in acidic environments, compatible with the powerful proton exchange membrane (PEM), an earth‐abundant OER catalyst that combines high activity and high stability is still unknown. Current PEM‐compatible OER catalysts still rely mostly on Ir and/or Ru as active components, which are both very scarce elements of the platinum group. Hence, the Ir and/or Ru amount in OER catalysts has to be strictly minimized. Unfortunately, the OER mechanism, which is the most powerful tool for OER catalyst optimization, still remains unclear. In this review, we first summarize the current state of our understanding of the OER mechanism on PEM‐compatible heterogeneous electrocatalysts, before we compare and contrast that to the OER mechanism on homogenous catalysts. Thereafter, an overview over monometallic OER catalysts is provided to obtain insights into structure‐function relations followed by a review of current material optimization concepts and support materials. Moreover, missing links required to complete the mechanistic picture as well as the most promising material optimization concepts are pointed out.

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“…Although the failure of an unstable catalyst is easily determined by asharp increase in overpotential ( Figure 3), [34] the stability test parameters are extremely varied, with little to no justification. We have summarized the most frequently used test parameters reported in the literature in frequency histograms for cell temperature,experiment run time,current density,a nd choice of galvano-or potentiostatic modes (see the Supporting Information).…”

Section: Quantificationmentioning

confidence: 99%

The Stability Challenges of Oxygen Evolving Catalysts: Towards a Common Fundamental Understanding and Mitigation of Catalyst Degradation

et al. 2017

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This Review addresses the technical challenges, scientific basis, recent progress, and outlook with respect to the stability and degradation of catalysts for the oxygen evolution reaction (OER) operating at electrolyzer anodes in acidic environments with an emphasis on ion exchange membrane applications. First, the term "catalyst stability" is clarified, as well as current performance targets, major catalyst degradation mechanisms, and their mitigation strategies. Suitable in situ experimental methods are then evaluated to give insight into catalyst degradation and possible pathways to tune OER catalyst stability. Finally, the importance of identifying universal figures of merit for stability is highlighted, leading to a comprehensive accelerated lifetime test that could yield comparable performance data across different laboratories and catalyst types. The aim of this Review is to help disseminate and stress the important relationships between structure, composition, and stability of OER catalysts under different operating conditions.

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RuxNb1−xO2 catalyst for the oxygen evolution reaction in proton exchange membrane water electrolysers

Cited by 50 publications

References 36 publications

Supporting IrO2 and IrRuO nanoparticles on TiO2 and Nb-doped TiO2 nanotubes as electrocatalysts for the oxygen evolution reaction

Supporting IrO2 and IrRuO nanoparticles on TiO2 and Nb-doped TiO2 nanotubes as electrocatalysts for the oxygen evolution reaction

Electrocatalytic Oxygen Evolution Reaction in Acidic Environments – Reaction Mechanisms and Catalysts

The Stability Challenges of Oxygen Evolving Catalysts: Towards a Common Fundamental Understanding and Mitigation of Catalyst Degradation

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