High-entropy alloys as advanced electrocatalysts for biomass conversion and sustainable hydrogen production

International Journal of Hydrogen Energy, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Language: Английский

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High Rate and Long-Cycle Life of Lithium–Sulfur Battery Enabled by High d-Band Center of High-Entropy Alloys

ACS Nano, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 26, 2025

Efficient catalysis of intermediate lithium polysulfide (LiPS) conversion in lithium-sulfur batteries is crucial for enhancing sulfur reduction reaction (SRR) kinetics and suppressing the shuttle effect LiPSs. High-entropy alloys (HEAs), with their compositional flexibility, structural diversity, multielement synergy, are promising high-efficiency catalyst candidates. Herein, a work function-dominated d-band center rule proposed to modulate chemical absorption ability LiPSs catalytic performance HEA catalysts. The as-screened PtCuFeCoNi HEAs (PCFCN-HEAs) modulated via distinct functions its five metallic elements. In addition, detailed density functional theory (DFT) calculations X-ray spectroscopy performed reveal roles individual elements HEAs. Optimizing PCFCN-HEAs notably enhances adsorption accelerates SRR. PCFCN-HEA nanoparticles deposited on surface hollow carbon spheres (HCSs) they combine hyphae nanobelts (HCNBs) form PCFCN-HEA/HCS/HCNB composite as host. cathode PCNFC-HEA exhibits stable cycling at 6C delivers high reversible capacity 652 mAh g-1 even rate 8C. DFT further elucidate stepwise mechanism PCFCN-HEAs, offering pathway designing

Language: Английский

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Advances in Novel Supported Pt‐Based Catalysts for Methanol Electrolysis

Advanced Sustainable Systems, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 23, 2025

Abstract Methanol electrolysis, coupling thermodynamically favorable methanol oxidation reaction (MOR) and hydrogen evolution (HER), is a promising strategy for energy‐saving generation as compared with traditional water splitting. Pt‐based catalysts are the best choice while intrinsic activity utilization of Pt should be increased due to its high cost. Supporting engineering effective in boosting catalytic effectiveness, some novel supports diverse support effects developed accelerate kinetics improve efficiency. Herein, comprehensive review recent advances electrocatalysts methanol‐assisted production provided. The mechanism electrolysis anode MOR cathode HER first outlined, respectively. Then, performance enhancement effects, including anchoring, electronic, synergistic, strain briefly discussed. Subsequently, clarified by supports, metal oxides, phosphides, selenides, tellurides, presented, promotion effect relevant challenges future perspectives concluded last section, where most attention paid metal‐supporting their understanding study.

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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Metal organic framework derived high entropy layered hydroxides for efficient oxygen evolution reaction

Discover Electrochemistry., Journal Year: 2025, Volume and Issue: 2(1)

Published: March 31, 2025

Language: Английский

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Synergistic Effect of N-Doped Carbon and Mn in NiFe LDH To Achieve 1 A cm^–2 Current Density for the Oxygen Evolution Reaction

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

Published: April 5, 2025

The development of highly efficient oxygen evolution reaction (OER) electrocatalysts is pivotal to enhance the performance alkaline water electrolyzers. Herein, a facile two-step electrodeposition method developed for fabrication nitrogen-doped carbon (NC) and manganese-incorporated NiFe layered double hydroxides (LDHs) supported on Ni foam (NF). When evaluated in 1.0 M KOH solution, optimized material NC20-Mn-NiFe LDH showed excellent OER requiring low overpotentials 298 331 mV achieve high current densities 500 1000 mA cm-2, respectively, no loss density was observed at fixed potentials 1.53 1.57 V 125 h each case. This not only better than that state-of-the-art RuO2/NF but also most recently reported LDH-based catalysts. Such remarkable mainly attributed vertical growth sheets NF, facilitated electron transfer charge modulation active metal sites due electron-withdrawing electron-donating effects NC Mn, resulting shift rate-determining step from OOH* formation O2 desorption with decreased free energy. research work provides further insights into modulating structure materials delivering industrial-level overpotentials.

Language: Английский

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Rapid co-reduction synthesis of ultrafine multi-principal element alloy nanocatalysts for efficient hydrogen evolution

CrystEngComm, Journal Year: 2024, Volume and Issue: 27(3), P. 302 - 306

Published: Dec. 10, 2024

A rapid co-reduction strategy was developed for the synthesis of ultrafine and composition-tunable multi-principal element alloy nanoparticles. The as-synthesized RuPtIrSnCu/C catalyst showed improved hydrogen evolution reaction performance.

Language: Английский

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