Exploring Suitability of Solid 3D Substrates for Designing Self-Supported Electrocatalysts for Water Splitting

Dalton Transactions, Journal Year: 2024, Volume and Issue: 53(37), P. 15390 - 15402

Published: Jan. 1, 2024

The choice of solid 3D substrates to design electrocatalysts significantly impacts the efficiency and effectiveness self-supported used in water splitting. These are pivotal boosting performance by providing structural support, facilitating electron transport, increasing active surface area. This improvement leads higher catalytic better stability, ultimately optimizing electrocatalytic process. interaction between substrate electrocatalyst can also affect intrinsic properties catalyst, further influencing its performance. Therefore, understanding use is vital for advancing water-splitting technologies. article explores critical role enhancing activity materials By examining recent developments research this region, we target showcase a comprehensive how different influence highlight future directions these systems applications.

Language: Английский

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Interfacial water activation by Pd promotes SO2 electroreduction to H2S on CuPd bimetallic catalysts

Journal of Colloid and Interface Science, Journal Year: 2025, Volume and Issue: 686, P. 970 - 977

Published: Feb. 3, 2025

Language: Английский

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High-Performance Nickel–Bismuth Oxide Electrocatalysts Applicable to Both the HER and OER in Alkaline Water Electrolysis

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

Published: Feb. 11, 2025

As an electrocatalyst for water electrolysis, nickel oxide (NiO) has received significant attention due to its cost-effectiveness and high reactivity among non-noble-metal-based catalytic materials. However, NiO still exhibits poor alkaline hydrogen evolution reaction (HER) oxygen (OER) kinetics compared conventional noble metal-based catalysts. This is because a strong interaction with protons the HER too low free energy of OH* state, resulting in slower rate-determining step (RDS) OER. To address these issues, adding dopant suggested as efficient method modify electron structure favorably each kinetics. In this context, we demonstrate that Bismuth (Bi), higher electronegativity than Nickel (Ni), induces positive charge on Ni sites. enhances activity by reducing number excessive cation interactions electrocatalyst. Moreover, Bi ratio increases, sites become more positively charged, changes electronic directly impact mechanism. Particularly, it confirmed HER, additives increase proton-adsorbed toward near-zero value and, additionally, decrease difference second considered RDS OER, calculated density functional theory. The effects both OER are demonstrated practical electrochemical evaluations half/single cells. Notably, Bi-containing catalysts Bi05:NiO Bi02:NiO exhibit remarkable kinetics, showing performance improvements 97.0% 21.9%, respectively.

Language: Английский

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Intermetallic Fe2Mo Nanoparticles on Hierarchical Nanoporous Copper for Efficient Hydrogen Evolution Reaction

Catalysts, Journal Year: 2025, Volume and Issue: 15(3), P. 278 - 278

Published: March 16, 2025

Developing cost-effective and high-performance non-precious metal-based electrocatalysts for hydrogen evolution reaction is of crucial importance toward sustainable energy systems. Herein, we prepare a novel hybrid electrode featuring intermetallic Fe2Mo nanoparticles anchored on the hierarchical nanoporous copper skeleton as robust electrocatalyst by simple scalable alloying dealloying methods. By virtue highly active unique bicontinuous facilitating ion/molecule transportation, Fe2Mo/Cu shows excellent electrocatalysis, with low Tafel slope (~71 mV dec−1) to realize ampere-level current density 1 A cm−2 at overpotential ~200 in M KOH electrolyte. Furthermore, exhibits long−term stability exceeding 400 h maintain ~250 mA an 150 mV. Such outstanding electrocatalytic performance enables be attractive catalyst water splitting economy.

Language: Английский

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Rational Synthesis of Isomeric Graphdiyne Frameworks toward Single‐Ruthenium Catalysts and High‐Performance Nitrogen Reduction

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

Published: March 31, 2025

Abstract Graphdiynes (GDYs), synthesized via direct coupling of arylacetylenes, have attracted great attention due to their unique electronic properties and structural diversity, typically forming 2D layered frameworks. However, crystalline GDY‐like frameworks with 3D topology remain challenging synthesize. Here, the study reports two highly crystalline, isomeric ThSi2 topology, constructed from 2,2′‐binaphthalene 6,6′‐biazulene‐based monomers. The azulene‐based framework, its large dipole moment, exhibits a narrow bandgap 1.15 eV, significantly lower than naphthalene counterpart (2.33 eV). As ruthenium (Ru) single‐atom supports, these enable strong Ru‐diyne interactions, achieving an ammonia yield rate 188.7 ± 1.6 µg h −1 mg cat Faradaic efficiency 37.4 0.6%. Such bicontinuous channels tunable structures offer electrocatalysis field new opportunities. Moreover, featuring higher highest occupied molecular orbital lowest unoccupied energy level, ensures superior electron mobility. These introduce covalent organic framework (COF) family diyne linkages pure carbon skeletons, broadening scope COF materials. Their well‐defined provide ideal platform for tuning optoelectronic properties, enabling fundamental studies on structure‐property relationships opening opportunities catalytic applications.

Language: Английский

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Unusual In-Electrolyte Stability of Doped Molybdenum Sulfide in pH Universal Hydrogen Evolution Reaction Conditions

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

Published: April 16, 2025

Language: Английский

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Optimization of Adsorption Sites for Selective Hydrobenzoin and Syngas Production in a Single Photoredox Cycle

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

Published: May 2, 2025

Abstract Integrating benzyl alcohol oxidation with carbon dioxide (CO 2 ) reduction in a single photoredox catalysis is of high economic and practical interest. However, it remains challenging to controllably regulate the selectivity specific C─C coupling chemicals (oxidation products) ratio monoxide hydrogen (CO/H for syngas (reduction products). Herein, an efficient photocatalyst consisting CdS nanorods decorated by Ni P (NP/CdS) developed, which achieves remarkable performance, producing hydrobenzoin (HB) excellent yield ≈315.4 µmol g −1 h ≈90%. This performance originates from optimized adsorption benzaldehydes protons, promoting generation critical radical intermediates (•CH(OH)Ph). Meanwhile, favorable desorption •CH(OH)Ph HB binding sites attained. On other hand, increasing content NP/CdS, CO/H can be adjusted across wide range (from ≈15:1 ≈2.6:1), enabling compositions suitable industrial feedstock applications. tunability attributed lower CO affinity phase compared while demonstrating higher activity H evolution. work presents novel approach selectively efficiently tunable simultaneously.

Language: Английский

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Boosting hydrogen adsorption via manipulating interfacial electronic structure of NiPx for enhanced alkaline seawater electrolysis

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: unknown, P. 155925 - 155925

Published: Sept. 1, 2024

Language: Английский

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Recent Progress in the Design and Application of Strong Metal–Support Interactions in Electrocatalysis

Inorganic Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: March 4, 2025

The strong metal-support interaction (SMSI) in supported metal catalysts represents a crucial factor the design of highly efficient heterogeneous catalysts. This can modify surface adsorption state, electronic structure, and coordination environment metal, altering interface structure catalyst. These changes serve to enhance catalyst's activity, stability, reaction selectivity. In recent years, multitude researchers have uncovered range novel SMSI types induction methods including oxidized (O-SMSI), adsorbent-mediated (A-SMSI), wet chemically induced (Wc-SMSI). Consequently, systematic critical review is desirable illuminate latest advancements deliberate its application within article provides characteristics various most methods. It concluded that significantly contributes enhancing catalyst selectivity, increasing catalytic activity. Furthermore, this paper offers comprehensive extensive electrocatalysis hydrogen evolution (HER), oxygen (OER), reduction (ORR), carbon dioxide (CO2RR). Finally, opportunities challenges faces future are discussed.

Language: Английский

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Focused Review on the Use of Bimetallic Alloy Nanoparticle Electrocatalysts in Water Splitting Reactions

The Journal of Physical Chemistry C, Journal Year: 2024, Volume and Issue: 128(45), P. 19037 - 19054

Published: Oct. 30, 2024

Alloy nanoparticles (NPs) have garnered significant attention in the diverse scientific and technological fields. Their unique ability to engineer structures promote formation of multifunctional composites with enhanced performance at nanoscale has fueled this interest. NPs offer advantages electrolysis, making them a promising material for green H2 evolution. This Review explores design development various alloy nanomaterials their potential as efficient electrocatalysts water-splitting reactions. Water electrolysis comprises two half-cell reactions: hydrogen evolution reaction (HER) or water reduction cathode oxygen (OER) oxidation anode. Both reactions involve multielectron transfer processes that require highly active catalysts minimize overpotential during electrocatalysis. An ideal electrocatalyst should exhibit comparable Pt HER surpass IrO2/RuO2 OER suitable conditions. discusses bimetallic materials HER, OER, overall splitting media, highlighting best-reported electrocatalysts.

Language: Английский

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