2021
DOI: 10.1021/acs.chemmater.0c04527
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Tailoring the Electronic Structures of the La2NiMnO6 Double Perovskite as Efficient Bifunctional Oxygen Electrocatalysis

Abstract: Double perovskite oxides are one of the most promising bifunctional electrocatalysts for efficient oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) due to their adjustable electronic structures via doping with different metal cations or engineering of defects. Herein, we report a systematic study on the tuning of the electronic structure of La 2−x Sr x NiMnO 6 with 0 ≤ x ≤ 1.0 to promote the bifunctional OER/ORR activity. The bifunctional index (ΔE) is substantially reduced with increasing o… Show more

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Cited by 73 publications
(53 citation statements)
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References 71 publications
(108 reference statements)
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“…The conventional mechanism of ORR of oxides in alkaline solution was described as four basic steps occurring on cationic centers, which adsorb intermediate products including *O 2 , *OH, *O and *OOH (Figure 5 e). [31, 32] For SMO x ‐SMO (−3.42 eV), the ORR kinetics was limited by the rate of surface *OH formation, with the enhanced reaction kinetics due to weakened intermediate *O adsorption [33] . The *OH (−3.53 eV) of SMO x ‐MO was difficult to desorb due to the strong adsorption of *O.…”
Section: Resultsmentioning
confidence: 99%
See 1 more Smart Citation
“…The conventional mechanism of ORR of oxides in alkaline solution was described as four basic steps occurring on cationic centers, which adsorb intermediate products including *O 2 , *OH, *O and *OOH (Figure 5 e). [31, 32] For SMO x ‐SMO (−3.42 eV), the ORR kinetics was limited by the rate of surface *OH formation, with the enhanced reaction kinetics due to weakened intermediate *O adsorption [33] . The *OH (−3.53 eV) of SMO x ‐MO was difficult to desorb due to the strong adsorption of *O.…”
Section: Resultsmentioning
confidence: 99%
“…Thec onventional mechanism of ORR of oxides in alkaline solution was described as four basic steps occurring on cationic centers,w hich adsorb intermediate products including *O 2 ,* OH, *O and *OOH (Figure 5e). [31,32] ForS MO x -SMO (À3.42 eV), the ORR kinetics was limited by the rate of surface *OH formation, with the enhanced reaction kinetics due to weakened intermediate *O adsorption. [33] The* OH (À3.53 eV) of SMO x -MO was difficult to desorb due to the strong adsorption of *O.Above of all, the epitaxially grown heterojunction had amore stable thermodynamic structure,and the positive shift of the Mn db and center led to the enhancement of the Mn oxidation state,while the partial filling of the e g orbitals of Mn 3+ promoted the reasonable adsorption of the intermediate *OH to enhanced the catalytic performance of the material.…”
Section: Methodsmentioning
confidence: 99%
“…Thus, B-site cations substitution is considered a very efficient way to improve the performance of the perovskite-based catalyst. The development of lanthanum-based double perovskite oxide (La 2 -x Sr x NiMnO 6 = LSNMO -x , x = 0, 0.2, 0.4, 0.6 and 0.8) bi-functional catalyst has been reported recently by Zhang and co-workers [ 74 ]. The study relates systematic doping of strontium (Sr) at B-site and its application in ORR and OER activities.…”
Section: Perovskite Electrocatalysts With B-site Substitutionmentioning
confidence: 99%
“…( c ) Current densities at an overpotential of 0.4 V for the OER as a function of hole state content. Copyright 2021 by the American Chemical Society [ 74 ].…”
Section: Figures and Schemementioning
confidence: 99%
“…However, in spite of the many advantageous features, one of the basic problems for its use is the slow kinetics of oxygen evolution and reduction reactions (OER and ORR) on the air cathodes [1]. In recent years, many efforts have been devoted to solve this problem by finding new electrocatalysts with sufficiently high activities to promote both reactions [2,[4][5][6][7][8][9].…”
Section: Introductionmentioning
confidence: 99%