High entropy alloy nanoparticles as efficient catalysts for alkaline overall seawater splitting and Zn-air batteries

Journal of Colloid and Interface Science, Год журнала: 2023, Номер 646, С. 844 - 854

Опубликована: Май 17, 2023

Язык: Английский

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Interfacial Engineering of Cobalt Thiophosphate with Strain Effect and Modulated Electron Structure for Boosting Electrocatalytic Hydrogen Evolution Reaction

Advanced Functional Materials, Год журнала: 2023, Номер 34(12)

Опубликована: Дек. 6, 2023

Abstract The fabrication of heterojunctions is an intriguing approach to boost the reactivity catalysts. However, facile preparation desirable heterojunction materials remains a challenge. Here, novel CoPS 3 /CoS 2 are created by intuitive phosphatization process on basis structurally flexible cobalt sulfide precursors. Significant stress effect exists at these heterogeneous interfaces, resulting in lattice distortions and exposure more active sites. interface interaction also modifies catalyst's electronic structure improve its electrical conductivity hydrogen adsorption capabilities. Notably, overpotential for electrocatalytic evolution reaction just 36.3 mV, which far superior those single‐component catalysts competitive with comparable reported. This work not only offers innovative electrocatalyst but strategy that can be used create based related transition metal thiophosphates.

Язык: Английский

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Water‐Stable Fluorous Metal–Organic Frameworks with Open Metal Sites and Amine Groups for Efficient Urea Electrocatalytic Oxidation

Small, Год журнала: 2023, Номер 19(43)

Опубликована: Июнь 27, 2023

Urea oxidation reaction (UOR) is one of the promising alternative anodic reactions to water that has attracted extensive attention in green hydrogen production. The application specifically designed electrocatalysts capable declining energy consumption and environmental consequences major challenges this field. Therefore, goal achieve a resistant, low-cost, environmentally friendly electrocatalyst. Herein, water-stable fluorinated Cu(II) metalorganic framework (MOF) {[Cu2 (L)(H2 O)2 ]·(5DMF)(4H2 O)}n (Cu-FMOF-NH2 ; H4 L = 3,5-bis(2,4-dicarboxylic acid)-4-(trifluoromethyl)aniline) developed utilizing an angular tetracarboxylic acid ligand incorporates both trifluoromethyl (-CF3 ) amine (-NH2 groups. tailored structure Cu-FMOF-NH2 where linkers are connected by fluoride bridges surrounded dicopper nodes reveals 4,24T1 topology. When employed as electrocatalyst, requires only 1.31 V versus reversible electrode (RHE) deliver 10 mA cm-2 current density 1.0 m KOH with 0.33 urea electrolyte delivered even higher (50 at 1.47 RHE. This performance superior several reported catalysts including commercial RuO2 catalyst overpotential 1.52 investigation opens new opportunities develop utilize pristine MOFs potential electrocatalyst for various catalytic reactions.

Язык: Английский

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Intensifying the Supported Ruthenium Metallic Bond to Boost the Interfacial Hydrogen Spillover Toward pH‐Universal Hydrogen Evolution Catalysis

Advanced Functional Materials, Год журнала: 2024, Номер 34(28)

Опубликована: Март 29, 2024

Abstract The effectuation of pH‐universal electrocatalysis is highly attractive but still challenging for the hydrogen evolution reaction (HER). It appeals not only facilitated electron transport also kinetical proton mass transfer. In this study, a via‐hole Ru/MoO 2 confined heterostructure profiled as metal‐support platform electron/mass transfer‐boosted HER studies. indicated that as‐formed Ru─O─Mo bridge can modulate electronic at interface, and adsorption transfer are kinetically derived by intensified metallic Ru─Ru bond. Resultantly, stably attains Pt‐beyond activity with an ultralow overpotential 9.2 mV 10 mA cm −2 in 1 m KOH, achieves competitive stability acidic/neutral electrolytes. Both experimental computational results reveal accelerated kinetics attributable to intensive through interfacial Ru→MoO spillover effect. This work opens up opportunities rationalize advanced electrocatalysts effect bond engineering.

Язык: Английский

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Au nanoclusters anchored on TiO2 nanosheets for high-efficiency electroreduction of nitrate to ammonia

Nano Research, Год журнала: 2023, Номер 17(3), С. 1209 - 1216

Опубликована: Авг. 14, 2023

Язык: Английский

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Amorphous Fe–Co oxide as an active and durable bifunctional catalyst for the urea-assisted H₂ evolution reaction in seawater

Chemical Communications, Год журнала: 2023, Номер 59(66), С. 9992 - 9995

Опубликована: Янв. 1, 2023

In this study, we prepared amorphous iron-cobalt oxide through the dealloying of trimetallic FeCoAl, showing excellent performance in both urea oxidation and hydrogen evolution reactions (UOR HER) alkaline seawater. The catalyst demonstrated stable UOR HER activity during long-term operations due to abundant active sites oxygen vacancies. required applied potentials 1.52 -0.185 V yield 100 mA cm-2 for HER, respectively. Moreover, when used as cathode anode, electrolyzer a working voltage 1.68 urea-assisted production.

Язык: Английский

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Iron-doping strategy promotes electroreduction of nitrate to ammonia on MoS2 nanosheets

Inorganic Chemistry Communications, Год журнала: 2023, Номер 151, С. 110621 - 110621

Опубликована: Март 15, 2023

Язык: Английский

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Asymmetric Bond Delta‐Polarization at the Interfacial Se─Ru─O Bridge for Efficient pH‐Robust Water Electrolysis

Advanced Functional Materials, Год журнала: 2024, Номер unknown

Опубликована: Июнь 10, 2024

Abstract The rationalization of pH‐robust catalysis is highly desired but challengeable for overall water electrolysis (WE). It requests a metal active site that can make an efficient adaption with both cathodic hydrogen and anodic oxygen evolution reactions (HER/OER). Herein, RuO 2‐x /RuSe 2 heterostructure electrocatalyst profiled interfacial Se─Ru─O bridge the splitting studies. An asymmetric bond delta‐polarization (Δp) found at bridge, including Δp > 0 Ru─O part < Ru─Se side by experiment calculation results. enlarged polarizability (Δp 0) in principle trigger lattice mediated (LOM) pathway OER; meanwhile, reduced benefit HER due to strengthened d‐p band hybridization. Resultantly, deliver ultralow overpotentials 25/10 mV Pt‐beyond 210/255 OER 10 mA cm −2 acidic/alkaline media, respectively. In especial, acidic WE be stably operated 200 h low cell voltage 1.478 V . This research clarifies polarization as criterion rational design catalysts.

Язык: Английский

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High-entropy alloys in water electrolysis: Recent advances, fundamentals, and challenges

Science China Materials, Год журнала: 2023, Номер 66(5), С. 1681 - 1701

Опубликована: Март 27, 2023

Язык: Английский

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Co Nanoparticles Confined in Mesoporous Mo/N Co‐Doped Polyhedral Carbon Frameworks towards High‐Efficiency Oxygen Reduction

Chemistry - A European Journal, Год журнала: 2023, Номер 29(23)

Опубликована: Янв. 11, 2023

Exploiting effective non-noble metal electrocatalysts for oxygen reduction reaction (ORR) is crucial fuel cells and metal-air batteries. Herein, we designed fabricated Co nanoparticles confined in Mo/N co-doped polyhedral carbon frameworks (Co-NP/MNCF) derived from polyoxometalate-encapsuled metal-organic framework, which showed comparable ORR performance with commercial Pt/C a larger diffusion-limited current density. Moreover, the Co-NP/MNCF also exhibited excellent stability methanol tolerance. These appealing performances can be attributed to porosity regulation heteroatom doping of framework frameworks, could beneficial exposure more active sites, optimization electronic structure mass transfer electrolyte/electron/ion.

Язык: Английский

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