Abstract Li‐CO 2 batteries have attracted ever increasing attention due to their high energy and power densities. However, Li CO 3 formed during the discharge process is difficult decompose, leading a large charge overpotential poor cyclability. Thus, high‐performance low‐cost catalysts that can be integrated into electrode architecture are urgently needed for development of practical with low long Herein, composite catalyst reported based on carbon quantum dots supported by holey graphene...

Silver nanoalloy electrocatalysts with comparable activity and better stability than commercial Pt/C for oxygen reduction reaction (ORR) in advanced metal–air batteries fuel cells.

Nanoalloying effects and dealloying endow D-AgCuPd aerogels with significantly enhanced FOR activity compared to their monometallic, bimetallic trimetallic counterparts.

The electrocatalytic activity of Pt‐based alloys exhibits a strong dependence on their electronic structures, but relationship between structure and oxygen reduction reaction (ORR) in Ag‐based is still not clear. Here, vapor deposition based approach reported for the preparation Ag 75 M 25 (M = Cu, Co, Fe, In) x Cu 100− ( 0, 25, 45, 50, 55, 75, 90, 100) nanocatalysts structures are determined by valence band spectra. d‐band center ORR volcano‐shape behaviors, where maximum catalytic obtained...

A carbon-free and binder-free catalyst layer composed of a Ag-Cu nanoalloy on Ni foam was used as the air cathode in zinc-air battery for first time. The prepared using pulsed laser deposition. structures catalysts were found to consist crystalline particles with an average size 2.58 nm embedded amorphous Cu films. As observed X-ray photoelectron spectra, Ag 3d core levels shifted higher binding energies, whereas 2p lower indicating alloying silver copper. Rotating disk electrode...

Bimetallic NiCo/CNF encapsulated in a N-doped carbon shell (NiCo/CNF@NC) catalyst for application Zn–air battery and water splitting has been reported this work.

Highly active electrocatalysts with a novel bimetallic arrangement of atoms for the oxygen reduction reaction (ORR) are vital commercialization fuel cells.

Rechargeable zinc–air batteries are typical environment-friendly energy storage devices with high density and low cost. Nevertheless, dendrite formation self-corrosion of zinc anode directly reduce battery performance. Herein, we report a novel Cu foam substrate uniform Ag nanoparticles deposited on the surface as three-dimensional (3D) in rechargeable zinc-air stacks for first time. Tafel linear scanning voltammetry measurements exhibit suppresses hydrogen evolution reaction reduces...

Engineering nanoparticle surfaces driven by various gas atmospheres has attracted intensive attention in the design of efficient electrocatalysts for sustainable energy applications. However, development a more facile and situ engineering strategy under electrochemical testing conditions to achieve surface-reconstruction-induced high performance is significantly lacking. Herein, first time, we report high-potential-driven restructuring ternary AgPdPt aerogels with dilute Pt (AgPd-Ptdilute)...

Inverse CeO₂/Pd catalysts with Pd/Ce alloying enhanced FOR activity by the electronic effect of Ce and oxophilic CeO₂.

A silver–copper metallic glass (AgCu-MG) electrocatalyst has been fabricated for rechargeable zinc–air batteries by pulsed laser deposition. The AgCu-MG exceptionally enhances the ORR catalytic activity to a half-wave potential of 0.78 V <italic>vs.</italic> RHE after 1000 CV treatments in 0.1 M KOH.

The rechargeable aprotic Li-CO2 batteries are novel and innovative technology for promising energy storage devices owing to the superb density capability of directly utilizing greenhouse gases CO2. However, they still suffering from a severe challenge in decomposing Li2CO3 discharge products, leading poor performance. Here we first time design completely synthesize alloyed RuCo nanoparticles evenly dispersed on carbon nanofibers (RuCo/CNFs) as highly active electrocatalysts batteries. In...

Alloy nanoclusters ("nanoalloys") are of interest because their novel properties compared to bulk alloys. In this paper, the thermal behavior, including melting, 55 atom Ag−Au nanoalloys has been investigated by molecular dynamics simulations using Gupta many-body potential. Single melting runs exhibit a sharp transition from cluster ground structures melt, while averaged results indicate that occurs in size- and composition-dependent temperature range. The point (melting point) decreases...

The plasmon coupling phenomenon of heterodimers composed silver, gold and copper nanoparticles 60 nm in size spherical shape were studied theoretically within the scattered field formulation framework. In-phase dipole coupled σ-modes observed for Ag-Au Ag-Cu heterodimers, an antiphase π-mode was heterodimer. These observations agree well with hybridization theory. However, quadrupole modes dominate high energy wavelength range from 357-443 scattering cross section D=60 We demonstrate first...

Abstract A highly efficient Ag‐Cu electrocatalyst is synthesized by the electrodeposition method and characterized with respect to its catalytic activity in oxygen reduction reaction (ORR) tolerance carbonate ions a zinc‐air battery. Cyclic voltammetry rotating‐disk electrode analyses suggest that Ag 50 Cu 2.5 times more catalytically active ORR than pure catalyst catalyzes through four‐electron pathway. Field‐emission TEM characterization shows surface‐roughened comprises small...

A novel one‐pot approach for synthesizing the dealloyed nanomaterials at room temperature is introduced first time. In such a synthetic strategy, applying modulated potentials effectively simplifies traditional dealloying route, which usually requires additional corrosion process to dissolve nonprecious metals. The AuNi nanodendrites (AuNi NDs) with tunable composition and uniformly elemental distribution are well developed by strategy. Impressively, as‐synthesized NDs exhibit higher...

The exploration and rational design of cost-effective, highly active, durable catalysts for oxygen electrochemical reaction is crucial to actualize the prospective technologies such as metal–air batteries fuel cells. Herein manganese cobalt oxide nanoparticles anchored on carbon nanofibers wrapped in a nitrogen-doped shell (MCO/CNFs@NC) successfully prepared. Benefiting from synergistic effect between core shell, MCO/CNFs@NC catalyst exhibits reduction (ORR) activity with comparable onset...

The large-scale practical application of formate oxidation reaction (FOR) catalysts is hindered by their low activity and high cost. Herein, for the first time, a series Pd-doped Ag dilute nanoalloys demonstrated to have catalytic in FOR with reduced consumption Pd metals through density functional theory calculations, where effects potential, solvent spin on performance are discussed. Pd1Ag(111) single-atom alloy (SAA) exhibits higher as reflected limiting potential 0.026 eV direct...

Formate is a kind of carbon-neutral fuel that can be synthesized by electrochemical conversion CO2, however, the generated aqueous formate electrolyte still short potential application. Here, solution proposed to utilized as anode fuels direct cells through oxidation reaction (FOR), and graphene supported AgPd nanoalloys (AgPd/rGO) are prepared catalyze FOR. Specifically, mass activity as-prepared Ag49Pd51/rGO catalyst 4.21 A mg-1Pd retention 49.1% initial after successive 500 cycles, which...