Na-doped ruthenium perovskite electrocatalysts with improved oxygen evolution activity and durability in acidic media

Retuerto, M.; Pascual, L.; Calle‐Vallejo, Federico; Ferrer, Pilar; Gianolio, Diego; Pereira, Alejandro; García, Álvaro; Torrero, Jorge; Fernández‐Díaz, M. T.; Benčok, P.; Peña, M.A.; Fierro, J.L.G.; Rojas, Sergio

doi:10.1038/s41467-019-09791-w

Cited by 259 publications

(249 citation statements)

References 61 publications

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“…The structure of SrRuO 3 can be modified by doping with a certain amount of Na element, as shown in Figure 8 a. [ 143 ] The doping of Na element tunes the free energy of oxygenated intermediates on Na‐doped perovskites, resulting in optimized OER activity with an ultra‐low overpotential of 120 mV at 0.5 mA cm −2 geo in 0.1 m HClO 4 , as shown in Figure 8b. In addition, the doping effect stabilizes the Ru metal center, leading to an increase of OER stability in acidic media.…”

Section: Precious Metal‐based Oer Catalystsmentioning

confidence: 99%

Recent Progress in Electrocatalysts for Acidic Water Oxidation

Lei

Wang

Zhao

et al. 2020

Advanced Energy Materials

201

161

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Hydrogen is a clean and renewable energy carrier for powering future transportation and other applications. Water electrolysis is a promising option for hydrogen production from renewable resources such as wind and solar energy. To date, tremendous efforts have been devoted to the development of electrocatalysts and membranes for water electrolysis technology. In principle, water electrolysis in acidic media has several advantages over that in alkaline media, including favorable reaction kinetics, easy product separation, and low operating pressure. However, acidic water electrolysis poses higher requirements for the catalysts, especially the ones for the oxygen evolution reaction. It is a grand challenge to develop highly active, durable, and cost‐effective catalysts to replace precious metal catalysts for acidic water oxidation. In this article, an overview is presented of the latest developments in design and synthesis of electrocatalysts for acidic water oxidation, emphasizing new strategies for achieving high electrocatalytic activity while maintaining excellent durability at low cost. In particular, the reaction pathways and intermediates are discussed in detail to gain deeper insight into the oxygen evolution reaction mechanism, which is vital to rational design of more efficient electrocatalysts. Further, the remaining scientific challenges and possible strategies to overcome them are outlined, together with perspectives for future‐generation electrocatalysts that exploit nanoscale materials for water electrolysis.

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Section: Precious Metal‐based Oer Catalystsmentioning

confidence: 99%

Recent Progress in Electrocatalysts for Acidic Water Oxidation

Lei

Wang

Zhao

et al. 2020

Advanced Energy Materials

201

161

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“…Compared with IrO 2 , Ru-based materials usually exhibit the relatively higher activity owing to the suitable binding ability of oxygenated intermediate species (*OH, *O, and *OOH) with the surface active sites 18 – 22 , but with a poor stability. Recently, a series of Ru-based oxides, including oxide perovskites 23 , 24 , 3 d metals doped RuO 2 25 , heterostructured Ru@IrO x 3 and Ru 1 –Pt 3 Cu 18 with compressive strain, were explored to simultaneously enhance their activities and stabilities in acidic electrolyte by regulating the compositions and surface strain. Although the activities of Ru-based catalysts are attractive, the stability is still only dozens of hours in acidic electrolyte.…”

Section: Introductionmentioning

confidence: 99%

Dopants fixation of Ruthenium for boosting acidic oxygen evolution stability and activity

et al. 2020

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Designing highly durable and active electrocatalysts applied in polymer electrolyte membrane (PEM) electrolyzer for the oxygen evolution reaction remains a grand challenge due to the high dissolution of catalysts in acidic electrolyte. Hindering formation of oxygen vacancies by tuning the electronic structure of catalysts to improve the durability and activity in acidic electrolyte was theoretically effective but rarely reported. Herein we demonstrated rationally tuning electronic structure of RuO2 with introducing W and Er, which significantly increased oxygen vacancy formation energy. The representative W0.2Er0.1Ru0.7O2-δ required a super-low overpotential of 168 mV (10 mA cm−2) accompanied with a record stability of 500 h in acidic electrolyte. More remarkably, it could operate steadily for 120 h (100 mA cm−2) in PEM device. Density functional theory calculations revealed co-doping of W and Er tuned electronic structure of RuO2 by charge redistribution, which significantly prohibited formation of soluble Rux>4 and lowered adsorption energies for oxygen intermediates.

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“…In particular, the oxygen evolution reaction (OER) is a challenging reaction with high activation overpotential and high potential conditions, leading to strongly oxidizing operating conditions for the anode materials. Many different materials have been investigated for this reaction (Wang et al, 2018;Laha et al, 2019;Retuerto et al, 2019;Chen et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Green Synthesis and Modification of RuO2 Materials for the Oxygen Evolution Reaction

2020

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Ion exchange method as a green synthesis route is proposed to prepare hydrous ruthenium oxide nanoparticles (H-RuO 2). Calcination of H-RuO 2 at 350°C resulted in the crystalline rutile RuO 2 nanoparticles (C-RuO 2). Treatment of H-RuO 2 with 20 vol% ammonium hydroxide solution under microwave irradiation and calcination at 350°C resulted in a highly electrocatalytic active crystalline RuO 2 nanoparticles (A-C-RuO 2). Electrocatalytic performances of H-RuO 2 , C-RuO 2 and A-C-RuO 2 for the oxygen evolution reaction in 0.50 mol L −1 H 2 SO 4 medium are evaluated and compared. Improved performances towards the oxygen evolution reaction are observed for A-C-RuO 2 when compared to C-RuO 2. Based on XRD, TEM, XPS and Raman characterizations performed on all the specimens, it is deduced that the physicochemical properties (crystallinity, mean crystallite size, level of hydrous rutile content) are varied for A-C-RuO 2 when compared to C-RuO 2. Structure-property correlation has been established to describe the higher electrocatalytic activity of A-C-RuO 2 .

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Na-doped ruthenium perovskite electrocatalysts with improved oxygen evolution activity and durability in acidic media

Cited by 259 publications

References 61 publications

Recent Progress in Electrocatalysts for Acidic Water Oxidation

Recent Progress in Electrocatalysts for Acidic Water Oxidation

Dopants fixation of Ruthenium for boosting acidic oxygen evolution stability and activity

Green Synthesis and Modification of RuO2 Materials for the Oxygen Evolution Reaction

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