Oxide loading effect on the electrochemical performance of LaNiO3 coatings in alkaline media

Soares, C. O.; Silva, R.A.; Carvalho, Maria Graça; Jorge, M. E. Melo; Gomes, A.; Rangel, C. M.; Pereira, M. I. da Silva

doi:10.1016/j.electacta.2012.11.040

Cited by 21 publications

(13 citation statements)

References 21 publications

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“…This is a clear indication for deterioration of rhombohedral LaNiO 3 structure as reported elsewhere. 16,17 Moreover, dramatic increase of redox peak intensity (+75% after 100 cycles, dark cyan bars in Fig. 3b inlet) with increasing cycle number correlates with significant ORR activity loss (0.03 mA cm −2 per cycle) in Fig.…”

Section: Xrd Sem and Tem-mentioning

confidence: 99%

On Activity and Stability of Rhombohedral LaNiO3 Catalyst towards ORR and OER in Alkaline Electrolyte

Mariappan

Bhandari

Drillet

2015

ECS Electrochemistry Letters

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LaNiO 3 catalyst was synthesized by RHP method and sprayed onto a GDL. Electrochemical activity for oxygen reactions of asprepared GDE was evaluated under half-cell condition in oxygen-saturated 7 M KOH electrolyte. Best performance in terms of potential difference E between ORR and OER amounted 0.688 V @ 10 mA cm −2 for 20 wt% LaNiO 3 /C HSAG compared to 1 V for 20 wt% Pt/C Vulcan . Moreover, by increasing perovskite:carbon weight ratio up to 3:2, E in oxygen decreased down to 0.57 V that is the lowest value ever reported in the literature. However, phase segregation and loss in ORR activity was observed during cycling. © The Author(s) 2015. Published by ECS. This is an open access article distributed under the terms of the Creative Commons Attribution Non-Commercial No Derivatives 4.0 License (CC BY-NC-ND, http://creativecommons.org/licenses/by-nc-nd/4.0/), which permits non-commercial reuse, distribution, and reproduction in any medium, provided the original work is not changed in any way and is properly cited. For permission for commercial reuse, please email: oa@electrochem.org. [DOI: 10.1149/2.0081506eel] All rights reserved. Because of high theoretical energy density, low toxicity and attractive price, metal-air batteries and especially zinc/air system is an interesting candidate for portable and stationary energy storage applications. However, large scale commercialization is hindered by inherent drawbacks of the zinc electrode, such as poor reversibility, low energy efficiency, shape change and dendrite formation during the charging process. Moreover, resistance towards carbonate poisoning in alkaline systems and activity/stability of bi-functional catalysts for oxygen reactions have to be improved.1 Suntivich et al. found a volcano-shape correlation between σ * -orbital occupation (e g ) of different La-based perovskites and their activity for both ORR 2 and OER 3 reactions. Among the investigated systems, LaNiO 3 appears to be one of the best candidates in terms of bifunctionality. It is meanwhile wellknown that the reaction rate of these catalysts strongly depends on particle size, intrinsic electronic conductivity, phase stability and preparation method. By co-precipitation of metal nitrate precursors with 1 M NaOH, extremely low Tafel slope value of 43 mV dec −1 (2RT/3F) for OER was measured at a pure Lanthanum Nickel Oxide phase powder without addition of binder materials. 4 This excellent value was attributed to a high carrier density (holes) and dominant presence of Ni 2+ at the surface, and to a large amount of oxygen vacancies. Not only oxidation state of the transition metal but also roughness factor of the powder material is primordial. By using a chlorine-modified precipitation route 5 to further oxidized Ni 2+ to Ni 3+ , Singh et al.,6 measured a seven times larger roughness factor in comparison to that of the product yielded by traditional precipitation method. 4 Bulk perovskite materials are generally synthesized by (i) solid-phase sintering at high temperature, typically by T > 1278 K, ...

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Section: Xrd Sem and Tem-mentioning

confidence: 99%

On Activity and Stability of Rhombohedral LaNiO3 Catalyst towards ORR and OER in Alkaline Electrolyte

Mariappan

Bhandari

Drillet

2015

ECS Electrochemistry Letters

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“…In addition, their electrochemical properties have been studied in the electrodes of supercapacitors. [22][23][24][25] However, it is not sufficient only to study the properties of LaBO 3 electrode materials in supercapacitors. 20,26 Perovskite-type oxides (LaBO 3 ) merit future study as potential candidate materials for the next generation of supercapacitors and other electrochemical energy storage devices.…”

Section: Introductionmentioning

confidence: 99%

Controlled synthesis of perovskite lanthanum ferrite nanotubes with excellent electrochemical properties

Zhang

Yuan

et al. 2017

RSC Adv.

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“…And the peak is the oxidation of lower oxidation state Ni 2+ to Ni 3+ as oxygen vacancy sites are filled. The conversion between different nickel oxidation states can be expressed as follows [39]: …”

Section: Effects Of Sr Contentmentioning

confidence: 99%

Sr-doped Lanthanum Nickelate Nanofibers for High Energy Density Supercapacitors

Cao

Lin

Sun

et al. 2015

Electrochimica Acta

123

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Oxide loading effect on the electrochemical performance of LaNiO3 coatings in alkaline media

Cited by 21 publications

References 21 publications

On Activity and Stability of Rhombohedral LaNiO3 Catalyst towards ORR and OER in Alkaline Electrolyte

On Activity and Stability of Rhombohedral LaNiO3 Catalyst towards ORR and OER in Alkaline Electrolyte

Controlled synthesis of perovskite lanthanum ferrite nanotubes with excellent electrochemical properties

Sr-doped Lanthanum Nickelate Nanofibers for High Energy Density Supercapacitors

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