Harnessing geometric distortion to stimulate oxygen reduction activity of atomically dispersed Fe catalysts in quasi-solid-state zinc-air batteries

Journal of Colloid and Interface Science, Journal Year: 2025, Volume and Issue: 686, P. 1157 - 1167

Published: Feb. 4, 2025

Language: Английский

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Construction of Pd–Te Intermetallic Compounds to Achieve Ultrastable Oxygen Reduction Activity

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(28), P. 36363 - 36372

Published: July 2, 2024

Palladium (Pd)-transition metal alloys have the potential to regulate intermediate surface adsorption strength in oxygen reduction reactions (ORR), making them a promising substitute for platinum-based catalysts. Nonetheless, prolonged electrochemical cycling can lead depletion of transition metals, resulting structural degradation and poor durability. Herein, synthesis alloy catalysts (Pd25%Te75%) containing Pd metalloid tellurium (Te) through one-step method is reported. Characterizations powder X-ray photoelectron spectroscopy, diffraction, high-resolution transmission electron microscopy demonstrated both uniform dispersion strong binding force elements within PdTe alloy, along with providing crystallographic details associated compounds. Based on density functional theory calculations, had more negative d-band center than that pure Pd, which reduces capacity between active sites intermediates ORR, therefore enhances reaction kinetics. The Pd25%Te75% exhibited excellent ORR activity, its onset half-wave potentials were ∼0.98 ∼0.90 V, respectively, at 1600 rpm O2-saturated 1.0 M KOH. Significantly, accelerated durability tests achieved exceptional stability, just decayed by 4 mV after 30000 consecutive cycles. Moreover, this study aims promote preparation other energy conversion applications.

Language: Английский

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Unveiling the Mystery of Precision Catalysis: Dual‐Atom Catalysts Stealing the Spotlight

Small, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 26, 2024

In the era of atomic manufacturing, precise manipulation structures to engineer highly active catalytic sites has become a central focus in catalysis research. Dual-atom catalysts (DACs) have garnered significant attention for their superior activity, selectivity, and stability compared single-atom (SACs). However, comprehensive review that integrates geometric electronic factors influencing DAC performance remains limited. This systematically explores structure DAC, addressing key macroscopic parameters, such as spatial arrangements interatomic distances, well microscopic factors, including local coordination environments structures. Additionally, metal-support interactions (MSI) long-range (LSI) are comprehensively analyzed, which play pivotal yet underexplored role governing behavior. integration tailored functional groups is further discussed fine-tune properties, thereby optimizing intermediate adsorption, enhancing reaction kinetics, expanding multifunctionality various electrochemical environments. offers novel insights into rational design by elucidating intricate mechanisms underlying DACs' exceptional performance. Ultimately, DACs positioned critical players precision catalysis, highlighting potential drive breakthroughs across broad spectrum applications.

Language: Английский

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Large 3D network of concave Fe-N-C nanoparticles by nano-welding for high-power fuel cells

Science China Chemistry, Journal Year: 2024, Volume and Issue: 68(5), P. 2081 - 2087

Published: Nov. 14, 2024

Language: Английский

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