A Superior Bifunctional Electrocatalyst in Which Directional Electron Transfer Occurs Between a Co/Ni Alloy and Fe─N─C Support

Small, Journal Year: 2024, Volume and Issue: 20(45)

Published: July 22, 2024

Abstract Stable, efficient, and economical bifunctional electrocatalysts for oxygen evolution reaction (OER) reduction (ORR) are needed rechargeable Zn–air batteries. In this study, a directional electron transfer pathway is exploited in spatial heterojunction of Co y Ni x @Fe─N─C heterogeneous catalyst effective electrolysis (OER/ORR). Thereinto, the Co/Ni alloy strongly coupled to Fe─N─C support through Co/Ni─N bonds. DFT calculations experimental findings confirm that bonds play bridging role from support, increasing content pyridinic nitrogen ORR‐active support. addition, discovered mechanism enhances both ORR/OER activity durability catalyst. The 0.66 0.34 with optimal Ni/Co ratio exhibits satisfying electrocatalytic performance, requiring an ORR half‐wave potential 0.90 V OER overpotential 317 mV at 10 mA cm −2 alkaline electrolytes. assembled zinc–air batteries (ZABs) incorporating cathode charge–discharge voltage gap comparable Pt/C||IrO 2 assembly high robustness over 60 h 20 .

Language: Английский

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Strategies for the enhancements in catalytic performance and stability of anodic electrocatalyst in PEM water splitting

Energy Reviews, Journal Year: 2024, Volume and Issue: 3(4), P. 100103 - 100103

Published: July 16, 2024

This article presents a strategy for enhancing the catalytic performance and stability of anodic electrocatalysts in proton exchange membrane (PEM) water splitting. PEM splitting is sustainable method producing hydrogen oxygen from utilizing electrocatalysts. However, employed this process are crucial its commercialization due to harsh condition causing low stability. The main focus review strategies improving as well electrocatalysts, such doping with heteroatoms, alloying other metals. results demonstrate that these modifications can significantly enhance These open new possibilities development efficient stable splitting, paving way widespread use clean energy applications.

Language: Английский

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Interstitial Manganese‐Tuned Nickel–Iron Diselenide Anode for Efficient and Durable Anion Exchange Membrane Water Electrolysis

Small, Journal Year: 2025, Volume and Issue: 21(11)

Published: Feb. 2, 2025

Abstract Anion exchange membrane water electrolysis (AEMWE) employing Ir/Ru‐free anodes emerges as a bright prospect for green hydrogen society. Here, Ni 0.8 Fe 0.2 Mn 0.1 Se 2 nanosheet electrocatalyst is reported, in situ grown on stainless‐steel paper, an efficient and durable self‐supporting AEMWE anode oxygen evolution reaction (OER). The interstitial [MnSe 4 ] tetrahedra elevate the Fermi level narrows band gap of electrocatalyst, thereby expediting electrode kinetics increasing electrical conductivity. In addition, atoms attenuate electron density motivate phase transition to actual active (Mn, Fe)‐doped γ ‐NiOOH species. downward d ‐band center facilitates rate‐limiting * OOH desorption step, refreshing center, reducing free energy barriers OER. Accordingly, achieves OER overpotentials 149 232 mV at 10 100 mA cm −2 1 m KOH. cell incorporating demonstrates high performance (1.0 A 1.68 V ) durability (at 300 h), surpassing most cells that use NiFe‐based anodes. This work highlights potential noble‐metal‐free AEMWE.

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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In-situ transformation and synergistic electrocatalysis of asymmetric threefold hollow sites in rosebud-like ternary metal diselenide

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 161585 - 161585

Published: March 1, 2025

Language: Английский

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F-doped Co3O4/carbon composite catalyst for alkaline oxygen evolution

Journal of Electroanalytical Chemistry, Journal Year: 2025, Volume and Issue: unknown, P. 119155 - 119155

Published: April 1, 2025

Language: Английский

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Construction of SnO2@CrS2 Nanocuboids Via Solvothermal Synthesis for Photoelectrochemical OER/HER Performance in Alkaline and Acidic Media and Water Detoxification Behavior

Catalysis Letters, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 16, 2024

Language: Английский

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