Multiple p-d hybridizations in Fe2P–CoFe2O4 heteronanosheets boost the electrocatalytic performance for alkaline water splitting

Li, Chen; Yu, Yingjie; Li, Min; Yang, Zehui; Luo, Fang

doi:10.1016/j.ijhydene.2023.06.066

Cited by 7 publications

(2 citation statements)

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“…In addition, the present catalytic system is approvingly competent with some of the efficient alkaline HER systems recently reported, as illustrated in Figure F. − All these revelations account for the excellent electrocatalytic activity and stability of the Co 3 O 4 @NiFeP-5/24h electrode toward HER. All these inferences symbolize the novelty of the as-designed 3D hierarchical flower-like architectures in enhancing the catalytic performance of metal phosphides toward the HER process.…”

Section: Resultssupporting

confidence: 75%

Architectural Decoration of Bioleached NiFeP Surfaces by Co₃O₄ Flowers for Efficient Electrocatalytic Hydrogen Generation

Anil,

Bhagya,

Bijimol

et al. 2024

ACS Appl. Mater. Interfaces

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In the quest for sustainable hydrogen production via water electrolysis, the development of high-performance, noble-metal-free catalytic systems is highly desired. Herein, we proposed an innovative strategy for the development of an electrocatalyst by refining the surface characteristics of a NiFeP alloy through microbiological techniques and subsequent enrichment of active sites by tailoring 3D hierarchical flower-like structures with intact and interconnected two-dimensional (2D) Co 3 O 4 . The resultant 3D Co 3 O 4 @NiFeP-5/24h has a porous structure comprised of intercrossed nanoparticles covering the entirety of the catalytic surface. This design ensures comprehensive electrolyte ion penetration and facilitates the release of gas bubbles while reducing bubble adhesion rates. Remarkably, the Co 3 O 4 @NiFeP-5/24h electrode demonstrates superior hydrogen evolution (HER) performance in an alkaline medium, characterized by its high stability, low overpotential (106 mV at a current density of 10 mA cm −2 ), and reduced Tafel slope (98 mV dec −1 ). Besides, the minimized interfacial contact resistance among the phases of electrode and electrolyte emphasizes the high HER performance of the 3D Co 3 O 4 @NiFeP-5/24h electrode. The innovative design and fabrication strategy employed herein holds significant potential for advancing the field of water-splitting electrocatalysis, offering a promising path toward the rational design and development of noblemetal-free electrocatalysts.

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Section: Resultssupporting

confidence: 75%

Architectural Decoration of Bioleached NiFeP Surfaces by Co₃O₄ Flowers for Efficient Electrocatalytic Hydrogen Generation

Anil,

Bhagya,

Bijimol

et al. 2024

ACS Appl. Mater. Interfaces

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“…3a, the peaks at 711.2, 714.9, 724.9, and 728.1 eV can be attributed to Fe 2+ 2p 3/2 , Fe 3+ 2p 1/2 , Fe 2+ 2p 1/2 , and Fe 3+ 2p 1/2 , respectively. 41,42 But no peaks of metallic iron particles were observed, which conrmed that the amount of Fe in the FeNC catalysts was extremely small. Doped Fe elements in the three catalysts coexisted in the form of bivalent and trivalent states.…”

Section: Morphology and Surface Chemistrymentioning

confidence: 96%

MOF-derived Fe–N–C electrocatalyst via a dual ligand strategy for efficient oxygen reduction in acidic media

Sheng,

Zheng,

Hou

et al. 2023

Sustainable Energy Fuels

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Electrochemical Leaching of Ni Dopants in IrRu Alloy Electrocatalyst Boosts Overall Water Splitting

Xie,

Feng,

Pan

et al. 2024

Adv Funct Materials

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The commercialization of water‐splitting technology strongly relies on the stable and high‐performance electrocatalyst for hydrogen and oxygen evolution reactions (HER‐OER). In this work, the nickel dopants in IrRu alloyed electrocatalyst for acidic water splitting activity are investigated. The incorporation of nickel dopants induces more oxygen atoms coordinating with Ir/Ru facilitating the formation of *OOH species via nucleophilic attack by H2O. Additionally, a fast surface reconstruction is achieved due to the electrochemical dissolution of Ni dopants; as a result, more oxygen species are incorporated, evidenced by in situ Raman spectroscopy and electrochemical impedance spectroscopy. Therefore, the mass activity for Ni@IrRu is enhanced by threefold than commercial IrO2 in acidic OER catalysis. Moreover, the nickel dopants balance the hydrogen binding strength; as a result, only 609 mV overpotential is demanded to reach 1 A cm−2 in acidic HER catalysis. The polymer electrolyte membrane water electrolyzer (PEMWE) test indicates only 1.87 V is required to attain 2 A cm−2, 160 mV lower than Pt/C‐IrO2 revealing its potential application in PEMWE.

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Multiple p-d hybridizations in Fe2P–CoFe2O4 heteronanosheets boost the electrocatalytic performance for alkaline water splitting

Cited by 7 publications

References 62 publications

Architectural Decoration of Bioleached NiFeP Surfaces by Co₃O₄ Flowers for Efficient Electrocatalytic Hydrogen Generation

Architectural Decoration of Bioleached NiFeP Surfaces by Co₃O₄ Flowers for Efficient Electrocatalytic Hydrogen Generation

MOF-derived Fe–N–C electrocatalyst via a dual ligand strategy for efficient oxygen reduction in acidic media

Electrochemical Leaching of Ni Dopants in IrRu Alloy Electrocatalyst Boosts Overall Water Splitting

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Multiple p-d hybridizations in Fe2P–CoFe2O4 heteronanosheets boost the electrocatalytic performance for alkaline water splitting

Cited by 7 publications

References 62 publications

Architectural Decoration of Bioleached NiFeP Surfaces by Co3O4 Flowers for Efficient Electrocatalytic Hydrogen Generation

Architectural Decoration of Bioleached NiFeP Surfaces by Co3O4 Flowers for Efficient Electrocatalytic Hydrogen Generation

MOF-derived Fe–N–C electrocatalyst via a dual ligand strategy for efficient oxygen reduction in acidic media

Electrochemical Leaching of Ni Dopants in IrRu Alloy Electrocatalyst Boosts Overall Water Splitting

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Architectural Decoration of Bioleached NiFeP Surfaces by Co₃O₄ Flowers for Efficient Electrocatalytic Hydrogen Generation

Architectural Decoration of Bioleached NiFeP Surfaces by Co₃O₄ Flowers for Efficient Electrocatalytic Hydrogen Generation