Highly stable RuO<sub>2</sub>/SnO<sub>2</sub>nanocomposites as anode electrocatalysts in a PEM water electrolysis cell

Lim, Jin‐Ho; Rahman, Gul; Chae, Sang Youn; Lee, Kwan Young; Kim, Chang Soo; Joo, Oh‐Shim

doi:10.1002/er.3081

Cited by 50 publications

(29 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Binary mixtures with Sn have been a controversial topic in the field of OER catalysis. Several studies have investigated Sn mixtures with Ir or Ru and found good to outstanding effects on activity and stability during different operation periods ranging from 250 h at 0.25 A cm −2 to 500 h at 0.5 A cm −2 in a PEM electrolyzer cell (80 °C) ,. However, in a conventional solution‐based hydrogen cell (50 °C, 6 n H 2 SO 4 ), Ir 0.5 Ru 0.5 O 2 outperforms the ternary mixture with 50 wt % tin by several hundred hours (1200 versus 800 h at 1 A cm −2 ) .…”

Section: Degradation Mechanisms and Mitigation Strategiesmentioning

confidence: 99%

“…Despite these reports, the formation of a single‐phase alloy of Ru/Ir/Sn is highly debated. The reported catalytic results vary from no activity loss to a total loss of activity upon reducing the noble metal content . Figure shows the phase diagram for rutile phase iridium tin oxides calculated by Wang et al .…”

Section: Degradation Mechanisms and Mitigation Strategiesmentioning

confidence: 99%

See 1 more Smart Citation

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

et al. 2017

View full text Add to dashboard Cite

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.

show abstract

Section: Degradation Mechanisms and Mitigation Strategiesmentioning

confidence: 99%

Section: Degradation Mechanisms and Mitigation Strategiesmentioning

confidence: 99%

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

et al. 2017

View full text Add to dashboard Cite

show abstract

“…Hydrogen possesses outstanding properties as an energy source, such as carbon neutrality, high efficiency, and nontoxic to environment . Electrocatalysis is an important emerging technology, because it is an inexpensive, clean, and environmentally friendly source of hydrogen energy . It is a simple process by which the strong bonds in water are broken to yield oxygen and hydrogen.…”

Section: Introductionmentioning

confidence: 99%

NiFeCo oxide as an efficient and sustainable catalyst for the oxygen evolution reaction

et al. 2019

View full text Add to dashboard Cite

SUMMARY It has become essential to develop efficient, economical, and earth‐abundant catalysts for clean, environmentally friendly, and sustainable fuel production. Herein we describe the fabrication of a ternary NiFeCo oxide catalyst with a RF‐magnetron sputtering technique and investigated as durable catalyst oxygen evolution reaction (OER). A comparative study of the electrocatalytic activities of pure, bimetallic, and trimetallic catalysts is performed. With the synergetic effects of electronic structural modification and the large electrochemical area of the ternary NiFeCo oxide catalyst, current densities of 1 and 10 mA cm−2 are attained at small overpotentials of 248 and 280 mV, respectively. The relatively low Tafel slope of the trimetallic electrode (32.25 mV dec−1) indicates favorable catalytic kinetics during OER. This is attributed to the catalytic performance of metal constituents with high oxidation states. The electrode exhibits outstanding durability during rigorous oxygen evolution testing in 1 M KOH for 500 hours. Simple sputtering deposition of multimetallic oxide catalyst films can be applied to fabricate other multimetallic catalysts and electrodes for robust, efficient water spitting, and electrochemical energy storage.

show abstract

“…RuO 2 À SnO 2 composite oxides have been widely investigated as dimensionally stable anodes in chloro-alkali industry and oxygen evolution catalysts in water electrolysis [1][2][3][4][5][6][7] due to their excellent electrochemical properties. In addition, RuO 2 /SnO 2 also displays high reactivity and stability for HCl oxidation to produce Cl 2 , which is known as Deacon reaction.…”

Section: Introductionmentioning

confidence: 99%

The Influence of RuO₂Distribution and Dispersion on the Reactivity of RuO₂−SnO₂Composite Oxide Catalysts Probed by CO Oxidation

Liu

Huang

et al. 2019

ChemCatChem

View full text Add to dashboard Cite

To elucidate the distribution and dispersion of RuO2 species on the reactivity, RuO2−SnO2 catalysts with 2 % and 5 % Ru contents have been prepared with impregnation (IMP), deposition‐precipitation (DP) and co‐precipitation (CP) methods, and probed by CO oxidation. With IMP and DP methods, RuO2 crystallites are predominantly formed on the catalyst surface, which is favorable for CO oxidation. Moreover, the IMP catalyst possesses surface RuO2 having smaller mean crystallite size and better dispersion than the DP catalyst, thus SnRuO‐IMP displays higher activity than SnRuO‐DP at the same Ru loadings. However, with CP method, RuO2 species is mainly present as Ru4+ cations in the lattice of rutile SnO2 to form a solid solution structure below the lattice capacity, which is less reactive than the surface RuO2 due to the restriction by the SnO2 lattice. In conclusion, surface RuO2 is revealed to be the active species, whose amount and dispersion determine the activity of the catalysts. By changing preparation methods, the distribution of RuO2 species in the catalysts is varied and impacts the reactivity of the catalysts evidently. The traditional impregnation is found to be the best method to prepare RuO2−SnO2, which shows the highest activity among all the catalysts.

show abstract

Highly stable RuO₂/SnO₂nanocomposites as anode electrocatalysts in a PEM water electrolysis cell

Cited by 50 publications

References 38 publications

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

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

NiFeCo oxide as an efficient and sustainable catalyst for the oxygen evolution reaction

The Influence of RuO₂Distribution and Dispersion on the Reactivity of RuO₂−SnO₂Composite Oxide Catalysts Probed by CO Oxidation

Contact Info

Product

Resources

About

Highly stable RuO2/SnO2nanocomposites as anode electrocatalysts in a PEM water electrolysis cell

Cited by 50 publications

References 38 publications

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

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

NiFeCo oxide as an efficient and sustainable catalyst for the oxygen evolution reaction

The Influence of RuO2Distribution and Dispersion on the Reactivity of RuO2−SnO2Composite Oxide Catalysts Probed by CO Oxidation

Contact Info

Product

Resources

About

Highly stable RuO₂/SnO₂nanocomposites as anode electrocatalysts in a PEM water electrolysis cell

The Influence of RuO₂Distribution and Dispersion on the Reactivity of RuO₂−SnO₂Composite Oxide Catalysts Probed by CO Oxidation