A high-entropy and low-cobalt perovskite of La0.7Sr0.3Co0.2Mn0.2Ni0.2Fe0.2Al0.2O3-x for both oxygen evolution and methanol oxidation reactions

Qiu, Haoqi; Yuan, Bingen; Zhao, Chuanxi; Dang, Jiaxin; Zhang, Chunfei; Wang, Qin; Xia, Lan; Miao, He; Yuan, Jinliang

doi:10.1016/j.ijhydene.2023.08.269

Cited by 11 publications

(1 citation statement)

References 54 publications

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“…In order to take full advantage of defect chemistry of BSCF, La-doped BSCF perovskite oxides prepared by Jung et al exhibited higher OER activity than the BSCF. , Sun’s group adopted moderately amount of Ni and Co (e g filling is 1.2) substitution to optimize the synergistic interplay of transition metal elements in perovskites and thus improved the OER activity . Qiu et al found that the OER ability of La 0.7 Sr 0.3 Co 0.2 Mn 0.2 Ni 0.2 Fe 0.2 Al 0.2 O 3– x exhibited a tendency to decrease after the initial increase accompanied by the raising number of B-site Co in HEO . Besides, the overpotential of high entropy perovskite oxides decreases with the increased Co 3+ /Co 2+ ratio in Figure f.…”

Section: High-entropy Oxides-based Electrocatalystsmentioning

confidence: 99%

High-Entropy Oxides as Electrocatalysts for the Oxygen Evolution Reaction: A Mini Review

Huang,

Wang,

et al. 2024

Energy Fuels

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It is crucial to develop cost-effective and high-efficiency catalysts for electrochemical water splitting. High-entropy oxides (HEOs) are promising emerging catalysts for the oxygen evolution reaction (OER) with outstanding catalytic activity and remarkable durability because of their flexibility and structural stability, as well as the synergistic effect of various elements. Herein, a panoramic view of the mechanism of the OER of HEO and the evaluation criteria for the performance of the OER of HEO are discussed. A sequence of key discoveries and achievements of HEO-based OER electrocatalysts with different structures such as perovskite, spinel, and rock-salt structures has been summarized, together with special focuses on the modification strategies including increasing the number of sites with active edges, adjusting the structure of electrocatalysts, and the improvement of electrical conductivity. Then the main preparation methods of HEO electrocatalysts are reviewed. Moreover, theoretical calculations applied in the production of OER catalysts are summarized to guide material design and understand the catalytic mechanism. Finally, this review highlights existing challenges and future design directions of HEO-based OER electrocatalysts.

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Section: High-entropy Oxides-based Electrocatalystsmentioning

confidence: 99%

High-Entropy Oxides as Electrocatalysts for the Oxygen Evolution Reaction: A Mini Review

Huang,

Wang,

et al. 2024

Energy Fuels

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Recent Advances in Perovskite Oxides for Oxygen Evolution Reaction: Structures, Mechanisms, and Strategies for Performance Enhancement

Sun,

Yuan,

Liu

et al. 2024

Adv Funct Materials

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Perovskite‐type oxides are widely employed as oxygen evolution reaction (OER) electrocatalysts due to their tunable composition, diverse structure, abundant natural reserves, remarkable stability, and low cost. The intrinsic OER electrocatalytic activity of these perovskite oxides is generally enhanced by improving conductivity, increasing specific surface area, and optimizing the adsorption of oxygen‐containing intermediates. This is achieved through rationally designed strategies, including compositional engineering, defect engineering, hybridization, and surface regulation. In this review, recent advances in perovskite oxides for OER are summarized, with a focus on exploring structure‐performance relationships. This review provides a brief introduction to the application of perovskite oxides in OER, followed by the classification and characteristics of these perovskite oxides. The primary OER catalytic mechanisms, and well‐established activity descriptors are discussed. The key strategies are concentrated for enhancing OER activity, including composition engineering, defect engineering, hybridization, and surface reconstruction. Finally, the challenges and opportunities in developing high‐performance perovskite oxides as OER electrocatalysts are presented.

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Research Progress of High‐entropy Oxides for Electrocatalytic Oxygen Evolution Reaction

Zhang,

Wang,

2024

ChemSusChem

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High‐entropy oxides (HEOs), similar to high‐entropy materials (HEMs), have "four‐core effects", i.e., high‐entropy effect, delayed diffusion effect, lattice distortion effect and cocktail effect, which have attracted more and more attention in the scientific field of renewable energy technology due to their unique structural characteristics, variable chemical composition and corresponding functional properties. HEOs have become potential candidates for electrocatalytic oxygen evolution reaction (OER), which is a key half reaction for electrolytic CO2, nitrogen reduction, and water electrolysis. However, the precise synthesis of HEOs with a wide range of components and structures is challenging, not to mention their active and stable operation for OER. In this paper, we review the recent advancements in the electrocatalytic oxygen evolution facilitated by HEOs in water electrolysis. We analyze these developments from the perspectives of activity and stability in acid and alkaline conditions, respectively. Furthermore, we summarize the design from the aspect of element composition, structure, morphology, and catalyst‐support interactions, along with related reaction mechanism of HEOs. Additionally, we discuss the current challenges faced by HEOs in the field of OER and suggest potential directions for the future development of HEOs beyond water electrolysis application.

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A high-entropy and low-cobalt perovskite of La0.7Sr0.3Co0.2Mn0.2Ni0.2Fe0.2Al0.2O3-x for both oxygen evolution and methanol oxidation reactions

Cited by 11 publications

References 54 publications

High-Entropy Oxides as Electrocatalysts for the Oxygen Evolution Reaction: A Mini Review

High-Entropy Oxides as Electrocatalysts for the Oxygen Evolution Reaction: A Mini Review

Recent Advances in Perovskite Oxides for Oxygen Evolution Reaction: Structures, Mechanisms, and Strategies for Performance Enhancement

Research Progress of High‐entropy Oxides for Electrocatalytic Oxygen Evolution Reaction

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