The hybrid Pt nanoclusters/Ru nanowires catalysts accelerating alkaline hydrogen evolution reaction

Advanced Powder Materials, Journal Year: 2024, Volume and Issue: 3(5), P. 100214 - 100214

Published: June 13, 2024

Water electrolysis via alkaline hydrogen evolution reaction (HER) is a promising approach for large-scale production of high-purity at low cost, utilizing renewable and clean energy. However, the sluggish kinetics derived from high energy barrier water dissociation impedes seriously its practical application. Herein, series hybrid Pt nanoclusters/Ru nanowires (Pt/Ru NWs) catalysts are demonstrated to accelerate HER. And optimized Pt/Ru NWs (10 ​% wt Pt) exhibits exceptional performance with an ultralow overpotential (24 ​mV 10 ​mA ​cm−2), small Tafel slope (26.3 dec−1), long-term stability, outperforming benchmark commercial Pt/C-JM-20 catalyst. This amazing also occurred in anion-exchange membrane devices, where it delivered cell voltage about 1.9 ​V 1 ​A ​cm−2 outstanding stability (more than 100 ​h). The calculations have revealed such superior exhibited by stems formed heterointerfaces, which significantly reduce decisive rate step cooperative-action between cluster Ru substance. work provides valuable perspectives designing advanced materials toward HER beyond.

Language: Английский

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Transforming Adsorbate Surface Dynamics in Aqueous Electrocatalysis: Pathways to Unconstrained Performance

Advanced Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 28, 2025

Abstract Developing highly efficient catalysts to accelerate sluggish electrode reactions is critical for the deployment of sustainable aqueous electrochemical technologies, yet remains a great challenge. Rationally integrating functional components tailor surface adsorption behaviors and adsorbate dynamics would divert reaction pathways alleviate energy barriers, eliminating conventional thermodynamic constraints ultimately optimizing flow within systems. This approach has, therefore, garnered significant interest, presenting substantial potential developing that simultaneously enhance activity, selectivity, stability. The immense promise rapid evolution this design strategy, however, do not overshadow challenges ambiguities persist, impeding realization breakthroughs in electrocatalyst development. review explores latest insights into principles guiding catalytic surfaces enable favorable contexts hydrogen oxygen electrochemistry. Innovative approaches tailoring adsorbate‐surface interactions are discussed, delving underlying govern these dynamics. Additionally, perspectives on prevailing presented future research directions proposed. By evaluating core identifying gaps, seeks inspire rational design, discovery novel mechanisms concepts, ultimately, advance large‐scale implementation electroconversion technologies.

Language: Английский

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“Three-in-One” Plasmonic Au@PtOs Nanocluster Driven Lateral Flow Assay for Multimodal Cancer Exosome Biosensing

Analytical Chemistry, Journal Year: 2024, Volume and Issue: 96(26), P. 10686 - 10695

Published: June 17, 2024

Exploiting the multiple properties of nanozymes for multimode lateral flow assay (LFA) is urgently required to improve accuracy and versatility. Herein, we developed a novel plasmonic Au nanostar@PtOs nanocluster (Au@PtOs) as signal tag LFA detection. Based on PtOs bimetallic doping strategy, Au@PtOs can indicate both excellent SERS enhancement nanozyme catalytic activity. Meanwhile, displays better photothermal effect than that nanostars. Therefore, colorimetric/SERS/temperature three-mode signals be read out based nanocomposite. The was combined with applied breast cancer exosome detection limit mode 2.6 × 103/4.1 101/4.6 102 exosomes/μL, respectively, which much superior common nanoparticles (∼105 exosomes/μL). Moreover, fingerprint molecular recognition ability mode, phenotypes derived from different cell lines discriminated easily. convenient visual colorimetric sensitive SERS/temperature quantitative modes, driven satisfy requirements accurate flexible multimodal sensing in application scenarios.

Language: Английский

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Quenching-induced atom-stepped bimetallic sulfide heterointerface catalysts for industrial hydrogen generation

eScience, Journal Year: 2024, Volume and Issue: unknown, P. 100311 - 100311

Published: Sept. 1, 2024

Language: Английский

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Sol–gel-derived nanostructured electrocatalysts for oxygen evolution reaction: a review

Journal of Materials Chemistry A, Journal Year: 2024, Volume and Issue: 12(31), P. 19720 - 19756

Published: Jan. 1, 2024

This review, for the first time, provides concise insights into synthetic methods, material characterization, and recent strategies boosting OER activity of various sol–gel-derived composites paving way subsequent research.

Language: Английский

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Semi‐Ionic F Modified N‐Doped Porous Carbon Implanted with Ruthenium Nanoclusters toward Highly Efficient pH‐Universal Hydrogen Generation

Small, Journal Year: 2024, Volume and Issue: 20(43)

Published: June 27, 2024

Abstract Developing high electroactivity ruthenium (Ru)‐based electrocatalysts for pH‐universal hydrogen evolution reaction (HER) is challenging due to the strong bonding strengths of key Ru─H/Ru─OH intermediates and sluggish water dissociation rates on active Ru sites. Herein, a semi‐ionic F‐modified N‐doped porous carbon implanted with nanoclusters (Ru/FNPC) introduced by hydrogel sealing‐pyrolying‐etching strategy toward highly efficient generation. Benefiting from synergistic effects between (Ru NCs) hierarchically F, N‐codoped support, such synthesized catalyst displays exceptional HER reactivity durability at all pH levels. The optimal 8Ru/FNPC affords ultralow overpotentials 17.8, 71.2, 53.8 mV current density 10 mA cm −2 in alkaline, neutral, acidic media, respectively. Density functional theory (DFT) calculations elucidate that F‐doped substrate support NCs weakens adsorption energies H OH sites reduces energy barriers elementary steps HER, thus enhancing intrinsic activity accelerating kinetics. This work provides new perspectives design advanced ultrafine metal conversion applications.

Language: Английский

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Sublimation Transformation Synthesis of Dual‐Atom Fe Catalysts for Efficient Oxygen Reduction Reaction

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 64(1)

Published: Sept. 3, 2024

Dual-atom catalysts (DACs) have garnered significant interest due to their remarkable catalytic reactivity. However, achieving atomically precise control in the fabrication of DACs remains a major challenge. Herein, we developed straightforward and direct sublimation transformation synthesis strategy for dual-atom Fe (Fe

Language: Английский

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Alleviating O-Intermediates Adsorption Strength over PdRhCu Ternary Metallene via Ligand Effect for Enhanced Oxygen Reduction in Practical PEMFCs

The Journal of Physical Chemistry Letters, Journal Year: 2025, Volume and Issue: unknown, P. 1899 - 1908

Published: Feb. 17, 2025

Expediting the torpid kinetics of acidic oxygen reduction reaction (ORR) is a crucial yet formidable challenge toward advancing proton exchange membrane fuel cells (PEMFCs) for commercialization. The cutting-edge Pd-based nanomaterials ORR are hindered by their low intrinsic activities and significant CO poisoning, stemming from simultaneously optimizing surface adsorption various adsorbates. Herein, we introduce an ultrathin PdRhCu ternary metallene (PdRhCu metallene) boosting in PEMFC. Mechanistic studies have identified that incorporation Cu into PdRh configuration could downshift d-band center on Pd to promote weakened key intermediates, ensuring efficient electron transfer between metal sites adsorbates, thereby lowering energy barriers rate-determining step ORR. As proof-of-concept, optimized demonstrates impressive performance with high half-wave potential (0.93 VRHE), negligible activity decay after 10 000 cycles, superior anti-CO-poisoning capacity compared counterparts commercial Pt/C catalysts. Intriguingly, metallene-assembled PEMFC achieves maximum power density 820 mW cm–2 electrocatalytic stability under H2/air conditions, paving avenues further advancements electrocatalyst engineering practical implementation PEMFCs.

Language: Английский

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Overcoming Interfacial Hydrogen Site-Blocking during Alkaline Formate Oxidation: Insights from Lattice-Compressed PdZr/C Catalysts

ACS Applied Materials & Interfaces, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 27, 2025

Improving the electrocatalytic conversion of formate in alkaline solutions is crucial for commercial application fuel cells. However, palladium-based catalysts used oxidation reactions (FOR) face challenges due to strong adsorption hydrogen intermediates, resulting lower catalytic efficiency environments. Herein, we prepared a PdZr/C catalyst aimed at employing doping-induced strain strategy reduce binding energy palladium and release more active sites formate. Through density functional theory calculations experimental investigations, find that lattice compression induced by Zr doping regulates electronic structure Pd. Specifically, incorporation dopant shifts d-band center Pd downward, weakening sites. This adjustment promotes desorption thus accelerating FOR kinetics alleviating site-blocking effect. As result, exhibited 2.4-fold increase activity compared conventional Pd/C catalyst. It also achieved peak potential delivered significantly higher current 1917 mA mg–1. These findings highlight critical role tuning properties offer valuable insights into design high-performance electrocatalysts technologies.

Language: Английский

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Optimization of 3D Metal‐Based Assemblies for Efficient Electrocatalysis: Structural and Mechanistic Studies

Small, Journal Year: 2025, Volume and Issue: unknown

Published: March 17, 2025

Abstract The commercial utilization of low‐dimensional catalysts has been hindered by their propensity for agglomeration and stacking, greatly minimizing active sites. To circumvent this problem, materials can be assembled into systematic 3D architectures to synergistically retain the benefits constituent nanomaterials, with value‐added bulk properties such as increased surface area, improved charge transport pathways, enhanced mass transfer, leading higher catalytic activity durability compared constituents. hierarchical organization building blocks within structures also enables precise control over catalyst's morphology, composition, chemistry, facilitating tailored design specific electrochemical applications. Despite surge in metal‐based assemblies, there are no reviews encompassing different types assemblies from nanomaterials electrocatalysis. Herein, review addresses gap investigating various self‐supported exploring how electrocatalytic performance elevated through structural modifications mechanistic studies tailor them reactions.

Language: Английский

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