Chemical Engineering Journal, Год журнала: 2023, Номер 478, С. 147415 - 147415
Опубликована: Ноя. 17, 2023
Язык: Английский
ACS Catalysis, Год журнала: 2022, Номер 13(1), С. 256 - 266
Опубликована: Дек. 15, 2022
Heteroatomic modulation of MnO2 is an effective way to introduce and tailor the catalytically active sites for electrochemical water oxidation. While great efforts have been devoted parsing configuration coordination dopants in dictating catalytic activity, less considered about feedback from structurally adapted host intrinsic activity sites. In this study, topological effect on oxygen evolution reaction (OER) was systemically investigated partially Ru-substituted various polymorphs. We show that different porosities responds differently Ru integration, thereby resulting varied lattice strains morphological changes. highly porous τ-MnO2 undergoes amorphization upon substitution, closely packed β-MnO2 suffers crystal splintering with drastically enhanced structural defects, which lends a low OER overpotential 278 mV at 10 mA cm–2 high turnover frequency 2022.2 h–1 19.6-fold higher than commercial RuO2 benchmark. Therefore, integration does not simply append relatively inert metal oxides but simultaneously modifies structure retroactively modulate activity. further follows mechanism as result oxide substrate. This study furnishes fresh systemic view dopant–substrate interplay modulating electrocatalytic tunneled structures.
Язык: Английский
Процитировано
45
Advanced Energy Materials, Год журнала: 2023, Номер 13(22)
Опубликована: Апрель 20, 2023
Abstract The oxygen evolution reaction (OER) is a crucial process in electrochemical water splitting, promising technology to renewably yield hydrogen gas from water. Designing and developing earth‐abundant, efficient, stable OER electrocatalysts replace the most widely used but scarce RuO 2 IrO are thus of critical interest. Recently, ABO 3 ‐structured perovskite oxides, especially rare‐earth nickelates, extensively studied for their potential use as electrocatalysts. In particular, epitaxial synthesis complex oxide thin films allows flexible precise control over materials so that structure–stability–property relationships can be established. Using nickelate model systems, this review illustrates how design researchers test different hypotheses proposed descriptors, well formulate new principles. Following brief introduction background mechanisms, activity methods, various strategies surveyed including strain tuning, composition control, surface termination/orientation selection, defect engineering, interface design. These have led atomic structures electronic properties nickelates which turn determine performance. Finally, remaining challenges perspectives toward deeper understanding oxides catalysts discussed.
Язык: Английский
Процитировано
42
CHINESE JOURNAL OF CATALYSIS (CHINESE VERSION), Год журнала: 2023, Номер 51, С. 5 - 48
Опубликована: Авг. 1, 2023
Язык: Английский
Процитировано
42
Small, Год журнала: 2023, Номер 20(5)
Опубликована: Окт. 3, 2023
Abstract The development of electrocatalysts that are not reliant on iridium for efficient acid‐oxygen evolution is a critical step towards the proton exchange membrane water electrolysis (PEMWE) and green hydrogen industry. Ruthenium‐based have garnered widespread attention due to their remarkable catalytic activity lower commercial price. However, challenge lies in balancing seesaw relationship between stability these during reaction (OER). This review delves into progress made Ru‐based with regards acid OER PEMWE applications. It highlights significance customizing acidic mechanism through coordination adsorption (AEM) lattice oxygen oxidation (LOM) attain ideal relationship. promising tradeoffs different electrocatalysts, including Ru metals alloys, single‐atomic materials, oxides, derived complexes, heterojunctions, as well applicability systems, discussed detail. Furthermore, this paper offers insights situ control active sites, dynamic mechanism, application PEMWE. Based three‐way cost, activity, stability, perspectives provided.
Язык: Английский
Процитировано
42
Chemical Engineering Journal, Год журнала: 2023, Номер 478, С. 147415 - 147415
Опубликована: Ноя. 17, 2023
Язык: Английский
Процитировано
41