Oxygen Evolution Activity and Chemical Stability of Ni and Fe Based Perovskites in Alkaline Media

Adolphsen, Jens Quitzau; Sudireddy, Bhaskar Reddy; Gil, Victor M. S.; Chatzichristodoulou, Christodoulos

doi:10.1149/2.0911810jes

Cited by 19 publications

(16 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, the LNFO sample shows a poor performance compared with Fe-LNO, and it needs 460 mV to reach 10 mA cm −2 . The above results show that the LNFO still cannot enhance the catalyst performance by doping Fe into LNO crystalline, which is also reported in a previous work [74]. Among the above various catalysts, the Fe-LNO showed the highest OER catalytic activity with the lowest overpotential of 350 mV to reach 10 mA cm −2 , especially in high voltage range, as shown in Figure 6(a).…”

Section: Superior Electrochemical Performance Of Fe-lnosupporting

confidence: 84%

Boosting Lattice Oxygen Oxidation of Perovskite to Efficiently Catalyze Oxygen Evolution Reaction by FeOOH Decoration

et al. 2020

View full text Add to dashboard Cite

In the process of oxygen evolution reaction (OER) on perovskite, it is of great significance to accelerate the hindered lattice oxygen oxidation process to promote the slow kinetics of water oxidation. In this paper, a facile surface modification strategy of nanometer-scale iron oxyhydroxide (FeOOH) clusters depositing on the surface of LaNiO3 (LNO) perovskite is reported, and it can obviously promote hydroxyl adsorption and weaken Ni-O bond of LNO. The above relevant evidences are well demonstrated by the experimental results and DFT calculations. The excellent hydroxyl adsorption ability of FeOOH-LaNiO3 (Fe-LNO) can obviously optimize OH- filling barriers to promote lattice oxygen-participated OER (LOER), and the weakened Ni-O bond of LNO perovskite can obviously reduce the reaction barrier of the lattice oxygen participation mechanism (LOM). Based on the above synergistic catalysis effect, the Fe-LNO catalyst exhibits a maximum factor of 5 catalytic activity increases for OER relative to the pristine perovskite and demonstrates the fast reaction kinetics (low Tafel slope of 42 mV dec-1) and superior intrinsic activity (TOFs of ~40 O2 S-1 at 1.60 V vs. RHE).

show abstract

Section: Superior Electrochemical Performance Of Fe-lnosupporting

confidence: 84%

Boosting Lattice Oxygen Oxidation of Perovskite to Efficiently Catalyze Oxygen Evolution Reaction by FeOOH Decoration

et al. 2020

View full text Add to dashboard Cite

show abstract

“…77 In some special cases, the OER performance of the catalyst has little change, or even a decrease, such as NiFe-based perovskite LaNi 0.5 Fe 0.5 O 3 . 98 It can be clearly seen from TEM analysis that there is some amorphous layer on the surface of perovskite after a long time of CV, but the activity is even worse than LNO. This may be because this amorphous layer does not contain the catalytic octahedral structure of NiO 6 or FeO 6 .…”

Section: Surface Reconstruction For Oer On Perovskitementioning

confidence: 99%

Regulation of Perovskite Surface Stability on the Electrocatalysis of Oxygen Evolution Reaction

Zhao

Shi

et al. 2021

ACS Materials Lett.

View full text Add to dashboard Cite

Electrocatalytic water splitting is considered as a promising route to use renewable energy for hydrogen production; however, its industrial application is limited by the anodic reaction, oxygen evolution reaction (OER). The key solution to unleash this constrain is to find an electrocatalyst that reduces the overpotential (η) of OER. Among the various electrocatalysts, perovskites have attracted intense attention recently for their high OER performance and low cost. To realize the commercial potential of perovskites, understanding its surface chemistry, including leaching, reconstruction, and lattice oxygen participated OER, is crucial to develop the nextgeneration perovskite catalysts,. In this Review, the perovskite surface stability is emphasized to be closely related to the chemical component of perovskite surface, which can be well controlled by surface engineering and further improves its OER performance. A new descriptor (stability level) is proposed to highlight the relationship between OER performance and surface stability of perovskite. This descriptor will provide potential strategies to optimize OER catalytic performance by tuning surface structure of perovskite.

show abstract

“…[38][39] Yet, even for a low temperature application (< 100 ℃), such as water splitting reaction, the presence of Fe in the B-site of perovskite oxides has shown favorable effects on its activity and stability. 1,[40][41][42][43][44][45][46] In this regard, some studies [40][41][42][43][44][45][46] have been carried out to understand the synergetic effect of Fe-doping in perovskite oxides; still, the explicit role of Fe is yet to be unraveled. Therefore at this stage, gaining thorough understandings of the role of Fe-doping in perovskite catalyst is vital for the future development of OER catalysts.…”

mentioning

confidence: 99%

Functional Role of Fe-Doping in Co-Based Perovskite Oxide Catalysts for Oxygen Evolution Reaction

et al. 2019

View full text Add to dashboard Cite

Perovskite oxides have been at the forefront among catalysts for the oxygen evolution reaction (OER) in alkaline media offering a higher degree of freedom in cation arrangement. Several of highly OER active Co-based perovskites have been known to show extraordinary activities and stabilities when the B-site is partially occupied by Fe. At the current stage, the role of Fe in enhancing the OER activity and stability is still unclear. In order to elucidate the roles of Co and Fe in the OER mechanism of cubic perovskites, two prospective perovskite oxides-La0.2Sr0.8Co1-xFexO3-δ and Ba0.5Sr0.5Co1-xFexO3δ with x = 0 and 0.2-were prepared by flame spray synthesis as nanoparticles. This study highlights the importance of Fe in order to achieve high OER activity and stability by drawing relations between their physicochemical and electrochemical properties. Ex situ and operando X-ray absorption spectroscopy (XAS) was used to study the local electronic and geometric structure under oxygen evolving conditions. In parallel, density function theory computational studies were conducted to provide theoretical insights into our findings. Our findings show that the incorporation of Fe into Co-based perovskite oxides alters intrinsic properties rendering efficient OER activity and prolonged stability.

show abstract

Oxygen Evolution Activity and Chemical Stability of Ni and Fe Based Perovskites in Alkaline Media

Cited by 19 publications

References 36 publications

Boosting Lattice Oxygen Oxidation of Perovskite to Efficiently Catalyze Oxygen Evolution Reaction by FeOOH Decoration

Boosting Lattice Oxygen Oxidation of Perovskite to Efficiently Catalyze Oxygen Evolution Reaction by FeOOH Decoration

Regulation of Perovskite Surface Stability on the Electrocatalysis of Oxygen Evolution Reaction

Functional Role of Fe-Doping in Co-Based Perovskite Oxide Catalysts for Oxygen Evolution Reaction

Contact Info

Product

Resources

About