Chinese Science Bulletin (Chinese Version), Journal Year: 2024, Volume and Issue: unknown
Published: Nov. 1, 2024
Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown
Published: March 3, 2025
Abstract Oxygen electrocatalysis is a core reaction in renewable energy devices, greatly promoting the transformation and upgrading of structure. Nonetheless, performance conversion devices hindered by large overpotential slow kinetics oxygen electrocatalytic reactions. Recently, single‐atom catalysts (SACs) have emerged as promising contenders field because their exceptional metal atom utilization, distinctive coordination environment, adjustable electronic properties. This review presents latest advancements design Co‐based SACs for electrocatalysis. First, OER ORR mechanisms are introduced. Subsequently, strategies regulating structure summarized three aspects, including centers, support carriers. A particular emphasis given to relationship between properties catalysts. Afterward, applications explored. Ultimately, challenges prospects prospected.
Language: Английский
Citations
4
Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown
Published: Nov. 7, 2024
Abstract Metal‐coordinated N‐doped carbon (M‐N‐C) materials with highly curved structures have become a promising class of electrocatalysts for the oxygen reduction reaction (ORR). However, stability these remains problem due to traditional post‐metal loading strategy. Herein, single‐atomic Co‐N‐C active sites anchored on helical carbonaceous nanotubes (HCNTs) are prepared (Co‐N‐C@HCNT) by pyrolyzing Co porphyrins and polypyrroles (PPys) mixtures at high‐temperature one‐step method. Aberration‐corrected high‐angle annular dark‐field scanning transmission electron microscopy (HAADF‐STEM) X‐ray absorption fine structure (XAFS) measurements confirm Co‐N 4 coordination Co‐N‐C@HCNT. The optimized Co‐N‐C@HCNT exhibits excellent catalytic ORR activity half‐wave potential ( E 1/2 ) 0.86 V versus reversible hydrogen electrode (vs RHE) compared Co‐N‐C@CNT without = 0.81 vs measured in 0.1 m KOH. also displays slight current decrease (4%) after running 10 h featuring tightly HCNTs electrostatic interactions between metal PPys. Theoretical calculations indicate that can increase charge d‐band center site, which enhances electrocatalytic activity. This work provides simple but effective strategy construct M‐N‐C materials.
Language: Английский
Citations
13
ACS Applied Nano Materials, Journal Year: 2025, Volume and Issue: 8(4), P. 1991 - 1999
Published: Jan. 16, 2025
Zinc–iodine (Zn–I2) batteries have received widespread attention due to their higher safety, rich resources, and eco-friendly features show a promising potential for large-scale energy storage. Nevertheless, challenges such as the shuttle effect of polyiodides sluggish redox kinetics iodine species during charge discharge processes hinder development. This work reports an effective strategy improve electrochemical performance Zn–I2 through size engineering nickel nanoparticles on biomass carbon. In situ UV in Raman spectroscopies reveal that dual-template enables catalyst provide more active sites adsorption catalysis species, thereby enhancing capacity accelerating I–/I2 conversion reaction. The is also significantly inhibited. Consequently, with size-reduced host cathode exhibit superior rate performance, low polarization, long cycle life.
Language: Английский
Citations
1
Ionics, Journal Year: 2025, Volume and Issue: unknown
Published: April 15, 2025
Language: Английский
Citations
0
Chemical Society Reviews, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 1, 2025
Recent progress made in Co-based electrocatalysts for selective four-electron (4e − ) and two-electron (2e electrocatalytic oxygen reduction reactions is reviewed.
Language: Английский
Citations
0
Advanced Powder Materials, Journal Year: 2025, Volume and Issue: unknown, P. 100298 - 100298
Published: April 1, 2025
Language: Английский
Citations
0
Chemical Communications, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 1, 2025
While commercial Pt/C remains the benchmark electrocatalyst for hydrogen evolution reaction (HER) due to optimal adsorption free energy of Pt, its bulk structure extensively embeds active sites, limiting practical utilization.
Language: Английский
Citations
0
Journal of environmental chemical engineering, Journal Year: 2025, Volume and Issue: unknown, P. 117133 - 117133
Published: May 1, 2025
Language: Английский
Citations
0
Journal of Catalysis, Journal Year: 2025, Volume and Issue: unknown, P. 116252 - 116252
Published: May 1, 2025
Language: Английский
Citations
0
Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown
Published: Dec. 11, 2024
Abstract Dual‐atom catalysts (DACs) possess tunable electronic structures and efficient atom utilization, making them highly promising for catalyzing the oxygen reduction reaction/oxygen evolution reaction (ORR/OER). However, achieving high catalytic activity stability both ORR OER in DACs remains a challenge. Herein, flexible membrane of porous carbon fiber anchored with atomically scattered CoN 4 /FeN dual sites adjacent Co 2 Fe /Fe 5 nanoclusters (Co, Fe‐DACs/NCs@PCF) is synthesized. The local geometry structure sites, which act as centers ORR/OER, are finely regulated by neighboring nanoclusters. This unique imparts Co, Fe‐DACs/NCs@PCF exceptional durability toward outperforming performance single‐atom containing only or FeN well commercial Pt/C RuO catalysts. Zinc–air battery employing cathode exhibits outstanding stability, maintaining cyclability over 1500 h, + air cathode. Theoretical calculations highlight distinct synergies between (Co ) clusters (CoN optimize coupling strength Fe(Co)─OH at potential‐determining steps thus improve (OER) kinetics. study lays theoretical practical foundation rational design heterostructure featuring coexisting within fibers.
Language: Английский
Citations
1