Accelerated proton-coupled electron transfer kinetics of iron phthalocyanine for oxygen reduction via heteropoly blue clusters

Applied Catalysis B Environment and Energy, Journal Year: 2025, Volume and Issue: unknown, P. 125080 - 125080

Published: Jan. 1, 2025

Language: Английский

---

Current status of developed electrocatalysts for water splitting technologies: from experimental to industrial perspective

Nano Convergence, Journal Year: 2025, Volume and Issue: 12(1)

Published: Feb. 6, 2025

Abstract The conversion of electricity into hydrogen (H 2 ) gas through electrochemical water splitting using efficient electrocatalysts has been one the most important future technologies to create vast amounts clean and renewable energy. Low-temperature electrolyzer systems, such as proton exchange membrane electrolyzers, alkaline anion electrolyzers are at forefront current technologies. Their performance, however, generally depends on costs system efficiency, which can be significantly improved by developing high-performance enhance kinetics both cathodic evolution reaction anodic oxygen reaction. Despite numerous active research efforts in catalyst development, performance electrolysis remains insufficient for commercialization. Ongoing innovative an understanding catalytic mechanisms critical enhancing their activity stability electrolyzers. This is still a focus academic institutes/universities industrial R&D centers. Herein, we provide overview state directions H production. Additionally, describe detail technological framework production utilized relevant global companies. Graphical

Language: Английский

---

Biphase Alloy Nanoheterojunction Encapsulated within N‐Doped Carbon Nanotubes as Bifunctional Oxygen Electrocatalyst for High‐Performance Zn‐Air and Mg‐Air Batteries

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

Published: Jan. 10, 2025

Abstract N‐doped carbon confined alloy catalysts possess considerable potential in facilitating oxygen electrocatalytic reaction and consequent applications metal air batteries, but the sluggish catalytic kinetics high barrier of reduction (ORR) remain bottleneck restricting its further development. Here, a novel CoFe‐NiFe biphase nanoheterojunction encapsulated within nanotubes (CoFe‐NiFe@NCNT) is fabricated via hydrothermal carbothermic approach. Owing to plentiful active sites electrical conductance, difference between OER ORR amounts merely 0.68 V. Simultaneously, performance Zn‐air Mg‐air batteries assembled by CoFe‐NiFe@NCNT serving as air‐cathode are superior that commercial Pt/C + RuO 2 . The DFT outcomes reveal transformation *OOH *O rate‐determining step (RDS) ORR/OER. Also, synergy heterojunction conducive reduce energy barrier. This study offers profound understanding toward structural design electrocatalysts utilization metal‐air for portable wearable electronic apparatuses.

Language: Английский

---

Supported Au Nanoparticles on Crystalline Carbon Nitride for Boosted Photocatalytic NO Oxidation

Applied Catalysis B Environment and Energy, Journal Year: 2025, Volume and Issue: unknown, P. 125164 - 125164

Published: Feb. 1, 2025

Language: Английский

---

Regulative Fe‐3d Orbitals via Lying‐Down Conformation of Metalorganic Molecules‐Axially Coordinated MXene for Rechargeable Zn–Air Batteries

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

Published: Jan. 15, 2025

Abstract A bifunctional electrocatalyst is developed, exhibiting high catalytic activity and reversibility for the oxygen reduction reaction (ORR) evolution (OER) through a regulative Fe d‐orbital engineering strategy. In this strategy, iron phthalocyanine organic molecule (FeOM) crystals are axially coordinated onto multilayer Mo 2 CT x MXene (FeOM‐Mo ), adopting lying‐down conformation. This hybridization fosters unique electronic guest–host interactions, with FeOM donating charge to via Fe−O bonding, leading symmetry breaking in distribution modified delocalization of Fe‐3d charge, accompanied by Fe(II) spin‐state transition. These transformations enhance adsorption desorption toward oxygenated intermediates, optimizing * OOH− O transition boost ORR OER kinetics. The FeOM‐Mo exhibits favorable half‐wave potential 0.961 V minimal overpotential 349 mV at 10 mA cm −2 1.0 m KOH. assembled aqueous zinc‐air battery (ZAB) achieves peak power density 155.3 mW exceptional charge–discharge durability over 1500 h, outperforming conventional (Pt/C + RuO ) system. Overall, findings underscore significance structural , paving way innovative air cathodes development rechargeable ZABs enhanced performance cost‐effectiveness.

Language: Английский

---

Engineering electrospun nanofiber electrocatalysts for oxygen electrocatalysis in Zn-air batteries

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

Published: Feb. 28, 2025

Language: Английский

---

Palladium Married with MBene Multilayers: Enabling Intensified Hydrogen Spillover for Efficient Nitrite‐to‐Ammonia Electroreduction

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

Published: April 8, 2025

Abstract Electrochemical nitrite reduction reaction (NO 2 RR) has emerged as a promising alternative approach for ammonia (NH 3 ) production, offering both energy efficiency and environmental sustainability. The rational regulation of active hydrogen (*H) is pivotal NO − ‐to‐NH conversion, yet it remains significant challenge in the context RR. In this study, molybdenum boride (MBene) multilayers are introduced an electronic support to integrate with palladium (Pd) nanoparticles, creating dual catalytic sites that effectively balance adsorption *H *NO , thereby enabling synergistic catalysis Theoretical experimental analyses revealed efficiently generated on Pd subsequently undergoes spillover ‐adsorbed MBene surfaces, facilitating accelerated hydrogenation NH synthesis. Consequently, Pd/MBene catalyst demonstrated exceptional performance, achieving high Faradaic 89%, yield rate 16.9 mg h −1 cat remarkable cycling stability at low applied potential ‐0.3 V versus RHE. Motivated by outstanding RR further utilized cathode construct Zn‐nitrite formaldehyde‐nitrite batteries. These systems functionality simultaneous production electricity generation, highlighting versatile efficient sustainable conversion.

Language: Английский

---

Enhancing the Performance of MXenes and MBenes-Based Materials for Maximized Efficiency in the Oxygen Reduction Reaction

IGI Global eBooks, Journal Year: 2025, Volume and Issue: unknown, P. 171 - 202

Published: April 8, 2025

MXenes and MBenes, advanced two-dimensional materials with outstanding structural electronic properties, are gaining prominence in energy conversion storage, particularly for the oxygen reduction reaction (ORR). ORR, essential fuel cells metal-air batteries, suffers from sluggish kinetics, efficient catalysts. While noble metals like platinum excel this role, their high cost scarcity necessitate alternatives. MXenes, consisting of transition metal carbides, nitrides, or carbonitrides, exhibit metallic conductivity tunable surface chemistry, making them ideal ORR catalysis. Similarly, nitride-based analogs, show great promise. Optimization methods selective etching, functionalization, heteroatom doping significantly enhance catalytic performance. This review explores synthesis, structure, mechanisms highlighting recent progress, addressing stability scalability challenges, identifying future directions improving efficiency sustainable applications.

Language: Английский

---

Hierarchical CoP@CNTs-bridged CeO2/CoP heterostructures-sealed hollow microcubes as highly-reversible electrocatalyst for Zn-Air batteries

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 162821 - 162821

Published: April 1, 2025

Language: Английский

---

Engineering CoN₄ and FeN₄ Dual Sites with Adjacent Nanoclusters on Flexible Porous Carbon Fibers for Enhanced Electrocatalytic Oxygen Reduction and Evolution

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 11, 2024

Abstract Dual‐atom catalysts (DACs) possess tunable electronic structures and efficient atom utilization, making them highly promising for catalyzing the oxygen reduction reaction/oxygen evolution reaction (ORR/OER). However, achieving high catalytic activity stability both ORR OER in DACs remains a challenge. Herein, flexible membrane of porous carbon fiber anchored with atomically scattered CoN 4 /FeN dual sites adjacent Co 2 Fe /Fe 5 nanoclusters (Co, Fe‐DACs/NCs@PCF) is synthesized. The local geometry structure sites, which act as centers ORR/OER, are finely regulated by neighboring nanoclusters. This unique imparts Co, Fe‐DACs/NCs@PCF exceptional durability toward outperforming performance single‐atom containing only or FeN well commercial Pt/C RuO catalysts. Zinc–air battery employing cathode exhibits outstanding stability, maintaining cyclability over 1500 h, + air cathode. Theoretical calculations highlight distinct synergies between (Co ) clusters (CoN optimize coupling strength Fe(Co)─OH at potential‐determining steps thus improve (OER) kinetics. study lays theoretical practical foundation rational design heterostructure featuring coexisting within fibers.

Language: Английский

---