Modulating the d‐Band Center Enables Ultrafine Pt₃Fe Alloy Nanoparticles for pH‐Universal Hydrogen Evolution Reaction

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(41)

Published: July 1, 2023

By providing dual active sites to synergistically accelerate H2 O dissociation and H+ reduction, ordered intermetallic alloys usually show extraordinary performance for pH-universal hydrogen evolution reaction (HER). Herein, activated N-doped mesoporous carbon spheres supported Pt3 Fe (Pt3 Fe/NMCS-A), as a highly-efficient electrocatalyst HER, are reported. The Fe/NMCS-A exhibits low overpotentials (η10 ) of 13, 29, 48 mV deliver 10 mA cm-2 in 0.5 m SO4 , 1.0 KOH, phosphate buffered solution (PBS), respectively, well robust stability maintain the overall catalytic performances. Theoretical studies reveal that strong Pt 5d-Fe 3d orbital electronic interactions negatively shift d-band center (εd 5d orbital, resulting reduced H* adsorption energy enhanced acidic HER activity. With acting co-adsorption *OH intermediates, barrier is required dissociate afford which greatly promotes formation alkaline neutral conditions. synthetic strategy further extended synthesis Co Ni with excellent activity electrolytes, demonstrating great potential these Pt-based practical applications.

Language: Английский

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Dynamic Surface Reconstruction of Amphoteric Metal (Zn, Al) Doped Cu₂O for Efficient Electrochemical CO₂ Reduction to C₂₊ Products

Advanced Science, Journal Year: 2023, Volume and Issue: 10(28)

Published: Aug. 2, 2023

Abstract The recognition of the surface reconstruction catalysts during electrochemical CO 2 reduction (CO2RR) is essential for exploring and comprehending active sites. Although superior performance Cu–Zn bimetallic sites toward multicarbon C 2+ products has been established, dynamic not fully understood. Herein, Zn‐doped Cu O nano‐octahedrons are used to investigate effect stability by leaching redeposition on CO2RR. Correlative characterizations confirm Zn from O, which redeposited at catalysts, leading abundant surface. reconstructed achieve a high Faradaic efficiency (FE) (77% –1.1 V versus reversible hydrogen electrode (RHE)). Additionally, similar also discovered in Al‐doped CO2RR, proving its universality amphoteric metal‐doped catalysts. Mechanism analyses reveal that OHC–CHO pathway can be C–C coupling processes bare introduction efficiently lower energy barrier CO2RR H 4 . This research provides profound insight into unraveling metal‐containing electrocatalysts guide rational design high‐performance

Language: Английский

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Recent Advances in Co‐Based Electrocatalysts for Hydrogen Evolution Reaction

Small, Journal Year: 2023, Volume and Issue: 19(45)

Published: July 11, 2023

Abstract Water splitting is a promising technique in the sustainable “green hydrogen” generation to meet energy demands of modern society. Its industrial application heavily dependent on development novel catalysts with high performance and low cost for hydrogen evolution reaction (HER). As typical non‐precious metal, cobalt‐based have gained tremendous attention recent years shown great prospect commercialization. However, complexity composition structure newly‐developed Co‐based make it urgent comprehensively retrospect summarize their advance design strategies. Hence, this review, mechanism HER first introduced possible role Co component during electrocatalysis discussed. Then, various strategies that could effectively enhance intrinsic activity are summarized, including surface vacancy engineering, heteroatom doping, phase facet regulation, heterostructure construction, support effect. The progress advanced electrocatalysts discussed, emphasizing above can significantly improve by regulating electronic optimizing binding crucial intermediates. At last, prospects challenges according viewpoint from fundamental explorations applications.

Language: Английский

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Carbon core–shell Pt nanoparticle embedded porphyrin Co-MOF derived N-doped porous carbon for the alkaline AEM water electrolyzer application

Journal of Materials Chemistry A, Journal Year: 2024, Volume and Issue: 12(10), P. 5967 - 5979

Published: Jan. 1, 2024

Efficient and durable carbon core-shell Pt@Co nanoparticles interconnected porous electrocatalyst for anion exchange membrane water electrolyzer application.

Language: Английский

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Co-Mo microcolumns decorated with trace Pt for large current density hydrogen generation in alkaline seawater

Applied Catalysis B Environment and Energy, Journal Year: 2022, Volume and Issue: 317, P. 121762 - 121762

Published: July 19, 2022

Language: Английский

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Defect-engineered WO3-x@MoS2 hollow tube exhibiting enhanced Fenton-like and photocatalytic activities via electric field rearrangement and band alignment

Applied Catalysis B Environment and Energy, Journal Year: 2022, Volume and Issue: 320, P. 122013 - 122013

Published: Sept. 22, 2022

Language: Английский

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Hierarchically porous nickel foam supported Fe-Ni3S2 electrode for high-current–density alkaline water splitting

Journal of Colloid and Interface Science, Journal Year: 2022, Volume and Issue: 629, P. 846 - 853

Published: Sept. 7, 2022

Language: Английский

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Out-of-plane CoRu nanoalloy axially coupling CosNC for electron enrichment to boost hydrogen production

Applied Catalysis B Environment and Energy, Journal Year: 2022, Volume and Issue: 318, P. 121890 - 121890

Published: Aug. 24, 2022

Language: Английский

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Effects of various metal doping on the structure and catalytic activity of CoB catalyst in hydrogen production from NaBH4 hydrolysis

Fuel, Journal Year: 2022, Volume and Issue: 331, P. 125733 - 125733

Published: Aug. 27, 2022

Language: Английский

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Construction of hierarchical and self-supported NiFe-Pt3Ir electrode for hydrogen production with industrial current density

Applied Catalysis B Environment and Energy, Journal Year: 2022, Volume and Issue: 321, P. 122072 - 122072

Published: Oct. 12, 2022

Language: Английский

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