Materials Science in Semiconductor Processing, Journal Year: 2024, Volume and Issue: 182, P. 108708 - 108708
Published: July 16, 2024
Language: Английский
Nano-Micro Letters, Journal Year: 2023, Volume and Issue: 15(1)
Published: July 29, 2023
Abstract The electrochemical oxygen reduction reaction (ORR) and evolution (OER) are fundamental processes in a range of energy conversion devices such as fuel cells metal–air batteries. ORR OER both have significant activation barriers, which severely limit the overall performance that utilize ORR/OER. Meanwhile, is another very important involving has been widely investigated. occurs aqueous solutions via two pathways: direct 4-electron or 2-electron pathways from O 2 to water (H O) hydrogen peroxide ). Noble metal electrocatalysts often used catalyze ORR, despite fact noble certain intrinsic limitations, low storage. Thus, it urgent develop more active stable low-cost electrocatalysts, especially for severe environments (e.g., acidic media). Theoretically, an ideal electrocatalyst should provide adequate binding species. Transition metals not belonging platinum group metal-based oxides substance could give d orbital species binding. As result, transition regarded substitute typical precious electrocatalysts. However, development oxide catalysts reactions still faces challenges, e.g., catalytic activity, stability, cost, mechanism. We discuss principles underlying design catalysts, including influence crystal structure, electronic structure on their performance. also challenges associated with developing potential strategies overcome these challenges.
Language: Английский
Citations
73
Advanced Science, Journal Year: 2024, Volume and Issue: 11(21)
Published: March 19, 2024
Abstract The generation of green hydrogen by water splitting is identified as a key strategic energy technology, and proton exchange membrane electrolysis (PEMWE) one the desirable technologies for converting renewable sources into hydrogen. However, harsh anode environment PEMWE oxygen evolution reaction (OER) involving four‐electron transfer result in large overpotential, which limits overall efficiency production, thus efficient electrocatalysts are needed to overcome high overpotential slow kinetic process. In recent years, noble metal‐based (e.g., Ru/Ir‐based metal/oxide electrocatalysts) have received much attention due their unique catalytic properties, already become dominant acidic OER process applied commercial devices. these still face thorny problem conflicting performance cost. this review, first, metal briefly classified according forms existence, mechanisms outlined. Then, focus on summarizing improvement strategies with respect activity stability over years. Finally, challenges development prospects discussed.
Language: Английский
Citations
71
Energy & Environmental Science, Journal Year: 2023, Volume and Issue: 17(2), P. 386 - 424
Published: Nov. 22, 2023
This review provides an in-depth discussion of the carbon-based electrocatalysts for rechargeable Zn–air batteries from design strategies, research progress, and future perspectives.
Language: Английский
Citations
70
Nature Communications, Journal Year: 2023, Volume and Issue: 14(1)
Published: Nov. 1, 2023
Transition metal oxides are promising electrocatalysts for zinc-air batteries, yet surface reconstruction caused by the adsorbate evolution mechanism, which induces zinc-ion battery behavior in oxygen reaction, leads to poor cycling performance. In this study, we propose a lattice mechanism involving proton acceptors overcome performance of OER process. We introduce stable solid base, hydroxy BaCaSiO4, onto surfaces PrBa0.5Ca0.5Co2O5+δ perovskite nanofibers with one-step exsolution strategy. The HO-Si sites on BaCaSiO4 significantly accelerate transfer from OH* adsorbed during As proof concept, rechargeable assembled composite electrocatalyst is an alkaline environment over 150 hours at 5 mA cm-2 galvanostatic charge/discharge tests. Our findings open new avenues designing efficient batteries.
Language: Английский
Citations
49
ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(10), P. 12781 - 12792
Published: Feb. 28, 2024
The traditional methods for creating oxygen vacancies in materials present several challenges and limitations, such as high preparation temperatures, limited vacancy generation, morphological destruction, which hinder the application of transition metal oxides field zinc–air batteries (ZABs). In order to address these we have introduced a pioneering lithium reduction strategy generating δ-MnO2@MXene composite materials. This stands out its simplicity implementation, applicability at room temperature, preservation material's structural integrity. research demonstrates that aqueous Ov-MnO2@MXene-5, with vacancies, exhibits an outstanding reaction (ORR) activity ORR half-wave potential reaching 0.787 V. DFT calculations demonstrated enhanced could be attributed adjustments electronic structure alterations adsorption bond lengths. These result from introduction turn promote electron transport catalytic activity. context batteries, cells Ov-MnO2@MXene-5 air cathode exhibit performance, featuring significantly improved maximum power density (198.3 mW cm–2) long-term cycling stability. Through innovative introducing this study has successfully electrochemical performance MnO2, overcoming limitations associated vacancies. Consequently, opens up new avenues directions nonprecious catalyst ZABs.
Language: Английский
Citations
45
Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(36)
Published: March 10, 2024
Abstract The compositing strategy offers great potential in designing bifunctional oxygen electrocatalysts for Zn–air batteries. Recent reports reveal that the couple of RuO 2 , serving as a benchmark evolution reaction (OER) catalyst, with other reduction (ORR) catalysts is wise choice to build highly efficient electrocatalysts. However, design criteria ORR and OER activities ‐based composite are still unclear. Herein, series transition metal (Fe, Co, Mn, Ni)‐doped spinel oxides designed support nanorods exploring mechanism. Through advanced technology, it considered increasing content binding energy Co 3+ enhancing oxidation state Ru 4+ an promote /Co‐based oxide catalysts. It found coupling Mn‐doping 3 O 4 (CMO) supports can induce highest catalytic ORR/OER excellent performance rechargeable Operando electrochemical impedance spectroscopy theoretical calculation further prove synergistic effect between CMO originated from overflow overcome large barrier desorption on during adsorption ORR.
Language: Английский
Citations
26
Applied Catalysis B Environment and Energy, Journal Year: 2024, Volume and Issue: 359, P. 124485 - 124485
Published: Aug. 8, 2024
Language: Английский
Citations
23
Advanced Materials, Journal Year: 2024, Volume and Issue: unknown
Published: May 9, 2024
Abstract Electrochemical CO 2 reduction reaction (CO RR) powered by renewable energy provides a promising route to conversion and utilization. However, the widely used neutral/alkaline electrolyte consumes large amount of produce (bi)carbonate byproducts, leading significant challenges at device level, thereby impeding further deployment this reaction. Conducting RR in acidic electrolytes offers solution address “carbonate issue”; however, it presents inherent difficulties due competitive hydrogen evolution reaction, necessitating concerted efforts toward advanced catalyst electrode designs achieve high selectivity activity. This review encompasses recent developments RR, from mechanism elucidation design engineering. begins discussing mechanistic understanding pathway, laying foundation for RR. Subsequently, an in‐depth analysis advancements catalysts is provided, highlighting heterogeneous catalysts, surface immobilized molecular enhancement. Furthermore, progress made device‐level applications summarized, aiming develop high‐performance systems. Finally, existing future directions are outlined, emphasizing need improved selectivity, activity, stability, scalability.
Language: Английский
Citations
21
Energy storage materials, Journal Year: 2024, Volume and Issue: 68, P. 103341 - 103341
Published: March 11, 2024
Composite strategies for constructing dual-atom sites at the hetero-interface provide considerable prospects designing efficient bifunctional oxygen catalysts. Given insufficient interface site and instability of phase interface, we need to develop more efficiently utilizing site. Here, report a doping strategy construct abundant in single-phase oxide Ru/Mn bond formation enables electronic interaction between Ru Mn, which reduces oxidation state meanwhile constructs electron-rich states Mn sites. DFT calculation was further applied explore reaction mechanism. We found that atoms serve as reduction evolution catalytic respectively facilitate adsorption OH* desorption. More importantly, co-adsorption OOH* on Mn/Ru dual can greatly enhance activity. The resulting Mn-RuO2 catalyst exhibits an ultra-low ORR/OER overpotential just 0.65 V, substantially lower than RuO2 MnOx. Remarkably, also demonstrates excellent stability, with minimal ORR decay after repeated OER cycling. Rechargeable zinc-air batteries using Mn-doped achieve super-durability 2000 cycles final energy efficiency retention 87.5%.
Language: Английский
Citations
16
ACS Nano, Journal Year: 2024, Volume and Issue: 18(33), P. 21651 - 21684
Published: Aug. 12, 2024
In order to facilitate electrochemical oxygen reactions in electrically rechargeable zinc-air batteries (ZABs), there is a need develop innovative approaches for efficient electrocatalysts. Due their reliability, high energy density, material abundance, and ecofriendliness, ZABs hold promise as next-generation storage conversion devices. However, the large-scale application of currently hindered by slow kinetics reduction reaction (ORR) evolution (OER). development heterostructure-based electrocatalysts has potential surpass limitations imposed intrinsic properties single material. This Account begins with an explanation configurations fundamentals electrochemistry air electrode. Then, we summarize recent progress respect variety heterostructures that exploit bifunctional electrocatalytic overview impact on ZAB performance. The range heterointerfacial engineering strategies improving ORR/OER performance includes tailoring surface chemistry, dimensionality catalysts, interfacial charge transfer, mass transport, morphology. We highlight multicomponent design take these features into account create advanced highly active catalysts. Finally, discuss challenges future perspectives this important topic aim enhance activity batteries.
Language: Английский
Citations
16