Ultrathin core–shell Au@RuNi nanowires for superior electrocatalytic hydrogen evolution

Jiang, Xian; Wei, Xianzi; Chen, Mushun; Fu, Chuankai; Wang, Yufei; Wang, Caikang; Sun, Hao; Zhou, Juan; Tang, Yawen

doi:10.1039/d4qi00518j

Inorg. Chem. Front.

2024

DOI: 10.1039/d4qi00518j

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Ultrathin core–shell Au@RuNi nanowires for superior electrocatalytic hydrogen evolution

Xian Jiang,

Xianzi Wei,

Mushun Chen

et al.

Abstract: The rational design of cost-effective, highly efficient, and stable Ru-based electrocatalysts as substitutes for Pt in the hydrogen evolution reaction (HER) is highly desirable and has garnered significant attention. Constructing...

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2024

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Epitaxial Growth of PdH@Ru Hollow Nanobamboos for Efficient Hydrogen Evolution in Anion Exchange Membrane Electrolyzer

Jiang,

Wang,

Ding

et al. 2024

Adv Funct Materials

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In‐depth comprehension and improvement of the sluggish hydrogen evolution kinetics in alkaline media is highly important to enhance the activity and durability of anion exchange membrane water electrolysis (AEMWE) for green hydrogen production. Herein, a hydrogen atom‐terminated core–shell PdH@Ru nanobamboos (NBs) is developed by the synergetic strategy of epitaxial growth and in situ DMF hydrogenation. The synthesized PdH@Ru NBs demonstrate exceptional activity for hydrogen evolution reaction (HER) in alkaline media, requiring only a 14 mV overpotential at the 10 mA cm−2, surpassing those of commercial Pt/C (35 mV) and H‐free Pd@Ru NBs (37 mV). Furthermore, an AEMWE device using PdH@Ru NBs as the cathode also achieves the current density of 1000 mA cm−2 at ≈1.80 V in 1.0 m KOH at 60 °C, with continuous operation for 50 h. The operando spectroscopic analysis and density functional theory calculations suggest that hydrogen insertion into the Pd@Ru NBs induces tensile strain on the Ru surface layer, altering the Pd/Ru electronic structure and weakening H adsorption, thereby enhancing the HER efficiency. The bamboo‐like hollow structure features numerous active sites, which contribute to the optimization of electron/mass diffusion in the alkaline electrolyte. This work provides a potential high‐efficiency cathodic electrocatalyst for industrial hydrogen production.

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Epitaxial Growth of PdH@Ru Hollow Nanobamboos for Efficient Hydrogen Evolution in Anion Exchange Membrane Electrolyzer

Jiang,

Wang,

Ding

et al. 2024

Adv Funct Materials

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OH Regulator of Amorphous CrO_x on Defect‐Rich Ultrafine Pd Nanowires Boosts Electrocatalytic Ethanol Oxidation

Zhou,

Liu,

Teng

et al. 2024

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Reasonable construction of high activity and selectivity electrocatalysts is crucial to achieve efficient ethanol oxidation reaction (EOR). However, the oxidation of ethanol tends to produce CO species that poison the active centers of the EOR electrocatalysts. Herein, a unique amorphous CrOx‐protected defect‐rich ultrafine Pd nanowires (CrOx‐Pd NWs) is developed. On the one hand, the CrOx layer can act as a protective layer to maintain the structure of the nanowire. On the other hand, it can play the role of OH regulator to optimize the adsorption energy barrier of intermediate species in Pd nanowire, thereby enhancing the ability of the catalyst to resist CO poisoning. The CrOx‐Pd NWs exhibit excellent EOR performance with 3.64 times higher mass activity and 50 mV lower CO electro‐oxidation potential than commercial Pd black. The results show that the CrOx layer promotes the dissociation of H2O into OHads, while the CrOx transfers electrons to neighboring Pd atoms optimizing the electronic configuration of Pd, thus selectively oxidizing ethanol to acetate and preventing the formation of toxic *CO. This work provides an effective strategy for the synthesis of nanowire materials with oxide/metal interfaces and offers new ideas for the design of catalysts that can efficiently drive EOR.

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Ti₃C₂T_x MXene induces strong electronic metal–support interaction with Ni nanoparticles for hydrogen evolution reaction with Pt-like activity

Han,

Yang,

Zhao

et al. 2024

Inorg. Chem. Front.

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Ultrathin core–shell Au@RuNi nanowires for superior electrocatalytic hydrogen evolution

Abstract: The rational design of cost-effective, highly efficient, and stable Ru-based electrocatalysts as substitutes for Pt in the hydrogen evolution reaction (HER) is highly desirable and has garnered significant attention. Constructing...

Cited by 3 publications

References 44 publications

Epitaxial Growth of PdH@Ru Hollow Nanobamboos for Efficient Hydrogen Evolution in Anion Exchange Membrane Electrolyzer

Epitaxial Growth of PdH@Ru Hollow Nanobamboos for Efficient Hydrogen Evolution in Anion Exchange Membrane Electrolyzer

OH Regulator of Amorphous CrO_x on Defect‐Rich Ultrafine Pd Nanowires Boosts Electrocatalytic Ethanol Oxidation

Ti₃C₂T_x MXene induces strong electronic metal–support interaction with Ni nanoparticles for hydrogen evolution reaction with Pt-like activity

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Ultrathin core–shell Au@RuNi nanowires for superior electrocatalytic hydrogen evolution

Abstract: The rational design of cost-effective, highly efficient, and stable Ru-based electrocatalysts as substitutes for Pt in the hydrogen evolution reaction (HER) is highly desirable and has garnered significant attention. Constructing...

Cited by 3 publications

References 44 publications

Epitaxial Growth of PdH@Ru Hollow Nanobamboos for Efficient Hydrogen Evolution in Anion Exchange Membrane Electrolyzer

Epitaxial Growth of PdH@Ru Hollow Nanobamboos for Efficient Hydrogen Evolution in Anion Exchange Membrane Electrolyzer

OH Regulator of Amorphous CrOx on Defect‐Rich Ultrafine Pd Nanowires Boosts Electrocatalytic Ethanol Oxidation

Ti3C2Tx MXene induces strong electronic metal–support interaction with Ni nanoparticles for hydrogen evolution reaction with Pt-like activity

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Product

Resources

About

OH Regulator of Amorphous CrO_x on Defect‐Rich Ultrafine Pd Nanowires Boosts Electrocatalytic Ethanol Oxidation

Ti₃C₂T_x MXene induces strong electronic metal–support interaction with Ni nanoparticles for hydrogen evolution reaction with Pt-like activity