Recent Advances of Lanthanum-Based Perovskite Oxides for Catalysis

Zhu, Huiyuan; Zhang, Pengfei; Dai, Sheng

doi:10.1021/acscatal.5b01667

Cited by 442 publications

(293 citation statements)

References 141 publications

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“…Very similar E a values of 113.0 kJ·mol −1 , 112.2 kJ·mol −1 and 95.6 kJ·mol −1 ,that are consistent with the literature data [34], were obtained for LaFeO 3 , La 0.8 Sr 0.2 FeO 3 and La 0.6 Sr 0.4 FeO 3 catalysts respectively. As expected, apparent activation energies show a slight dependence on the A-site ions with the partial Sr-substitution for La [35] because B-site transition metals, such as Fe, provide redox active site to facilitate catalytic reactions [36].…”

Section: -6supporting

confidence: 72%

Catalytic combustion of methane by perovskite-type oxide nanoparticles as pollution prevention strategy

Zaza¹,

Luisetto²,

Serra³

et al. 2016

AIP Conference Proceedings

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Catalysis science offers to combustion technology significant opportunity to increase the fuel efficiency by lowering the internal temperature gradients and reduce the environmental impact by lowering local peak temperature and, consequently, thermodynamically inhibiting the nitrogen oxides formation. Alternative catalytic materials are transition metals oxide, including complex oxides with perovskite crystalline structure. The aim of this work is to synthetize lanthanum ferrite perovskites with lanthanum ions partially substituted by strontium ions in order to study the substitution effects on structural properties and redox activity of the original oxide. Lanthanum ferrite oxides partially substituted with different Strontium amount were synthesized by solution combustion method. The perovskite nanopowders obtained were characterized by XRD, SEM, TPR analyses for defining crystalline structure, morphology and redox properties. Finally, the catalytic activity for methane combustion was tested. The most performing catalysts was La0:6Sr0:4FeO3 having the highest oxygen vacancy concentration as revealed byTPR analysis

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Section: -6supporting

confidence: 72%

Catalytic combustion of methane by perovskite-type oxide nanoparticles as pollution prevention strategy

Zaza¹,

Luisetto²,

Serra³

et al. 2016

AIP Conference Proceedings

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“…The perovskite structure ABO3−δ has been chosen for many systematic studies of catalytic activity [25,[46][47][48][49][50], including oxygen reduction and evolution (i.e., oxygen electrocatalysis) [14,22,[25][26][27][28][51][52][53][54][55]. The key idea of this section is a demonstration of both intentional and unintentional effects of chemical substitution or changes in stoichiometry on the activity for oxygen reduction ( Figure 2).…”

Section: Effect Of Chemical Substitution On Activitymentioning

confidence: 99%

“…Systematic empirical studies of the ORR on oxides have been performed since the 1970s (Table 1), where highly active oxides were characterized by amphoteric metallic conduction [17,21], sigma bands [17] with an occupation near unity of e g orbitals [22], high covalence [22], and paramagnetism [23,24] fostering a specific ('side-on') configuration of the likewise paramagnetic oxygen molecule on the surface. Oxides with perovskite or closely related structures played an important role in the discovery of these insights because their physicochemical properties can be systematically tuned [14,22,[25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Perovskite Electrocatalysts for the Oxygen Reduction Reaction in Alkaline Media

Risch

2017

Catalysts

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Abstract:Oxygen reduction is considered a key reaction for electrochemical energy conversion but slow kinetics hamper application in fuel cells and metal-air batteries. In this review, the prospect of perovskite oxides for the oxygen reduction reaction (ORR) in alkaline media is reviewed with respect to fundamental insight into activity and possible mechanisms. For gaining these insights, special emphasis is placed on highly crystalline perovskite films that have only recently become available for electrochemical interrogation. The prospects for applications are evaluated based on recent progress in the synthesis of perovskite nanoparticles. The review concludes with the current understanding of oxygen reduction on perovskite oxides and a perspective on opportunities for future fundamental and applied research.

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“…36,37 These materials have also been shown to represent important replacements for platinum in electrolysis and fuel cells. 34,38 We conducted preliminary tests using these commercially available materials as cathode materials for RFCBs and found that RuO 2 showed a higher cathode performance than IrO 2 .…”

Section: Resultsmentioning

confidence: 99%

Design of a Rechargeable Fuel-Cell Battery with Enhanced Performance and Cyclability

Hibino

Kobayashi

Nagao

et al. 2016

J. Electrochem. Soc.

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Electrochemical devices integrating a fuel cell with a hydrogen storage medium are able to function as secondary batteries. Batteries incorporating a partially oxygenated carbon anode with a RuO 2 /C cathode exhibit excellent reversibility, but their performance is not yet sufficient for secondary battery applications. This is due to excessive oxygenation of the anode, degradation of the cathode and the excess weight of the electrolyte membrane. In the present work, we addressed these challenges through various improvements in the design of a rechargeable proton-exchange membrane battery. These included coating the surface of a significantly oxygenated carbon anode (O/C atomic ratio 0.131) with carbon black nanoparticles, nanocrystallization of a carbon-free RuO 2 cathode (avg. crystallite size 1.1 nm) and the synthesis of an inorganic-organic composite electrolyte membrane. As a result of these optimizations, coulombic efficiencies of over 95% were achieved during charge/discharge over the voltage range of 0.0-1.5 V at 75 • C. The resulting device exhibited an initial capacity of 330 mAh g −1 and was stable over 300 cycles, with maximum energy and power densities of Hydrogen is a promising medium for the storage and supply of electricity through water-electrolysis/fuel-cell operation.1,2 The primary application of hydrogen in this context would be to store surplus power when the quantity of electricity produced by natural energy sources exceeds that required by a consumer.3-5 Rechargeable fuel cells capable of operating alternately in electrolyzer and fuel cell modes are recognized as the optimum systems because they are smaller and more compact than conventional systems based on isolated water electrolyzer and fuel cell units.6-8 The key technology necessary for such devices is hydrogen storage, which is currently accomplished via liquefaction and compression of the gas or by the physical or chemical adsorption of hydrogen atoms or molecules in/on materials such as metal or organic chemical hydrides.9,10 However, an energy input is required for these processes that in turn increases the overall cost. Furthermore, the hydrogen tanks and lines employed in such systems negatively impact their volumetric energy density.To mitigate these problems, rechargeable fuel-cell batteries (RFCBs) containing a hydrogen storage medium have been proposed. [11][12][13] During the operation of such batteries, hydrogen production, storage, supply and utilization processes must be conducted at the anode under the standard operational conditions of the cell, such as between room temperature and 80• C and at ambient pressure. In this context, oxygen-functionalized microporous carbons (MPCs) are promising hydrogen storage media, due to their excellent reversibility. 13 The redox pair between carbonyl (C=O) and phenol (C-OH) groups is one of the most important hydrogen carrier sites in such carbon anodes. The origin of this redox reaction is ascribed to the following equilibrium reaction between the two functional groups.This reaction...

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Recent Advances of Lanthanum-Based Perovskite Oxides for Catalysis

Cited by 442 publications

References 141 publications

Catalytic combustion of methane by perovskite-type oxide nanoparticles as pollution prevention strategy

Catalytic combustion of methane by perovskite-type oxide nanoparticles as pollution prevention strategy

Perovskite Electrocatalysts for the Oxygen Reduction Reaction in Alkaline Media

Design of a Rechargeable Fuel-Cell Battery with Enhanced Performance and Cyclability

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