Ammonia‐Induced FCC Ru Nanocrystals for Efficient Alkaline Hydrogen Electrocatalysis

He, Shunyi; Tu, Yuanhua; Zhang, Jiaxi; Zhang, Longhai; Ke, Jun; Wang, Liming; Du, Li; Cui, Zhiming; Song, Huiyu

doi:10.1002/smll.202308053

Cited by 5 publications

(2 citation statements)

References 59 publications

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“…Researchers can easily modulate thermodynamic and kinetic factors to influence the morphologies of noble metal nanocrystals by wet-chemistry synthesis. The structures of noble metal nanocatalysts can be broadly categorized into nanoparticles (NPs) [26][27][28][29][30][31][32][33], nanowires (NWs) [34][35][36][37][38][39][40], nanoribbons (NRs), nanosheets (NSs), nanoplates (NPs) and, nanocages [41], nanoframes [2,[42][43][44], etc.…”

Section: Morphology Engineeringmentioning

confidence: 99%

Recent advances of doping strategy for boosting the electrocatalytic performance of two-dimensional noble metal nanosheets

Wei,

Shen,

Wang

et al. 2024

Nanotechnology

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Benefiting from the ultrahigh specific surface areas, massive exposed surface atoms, and highly tunable microstructures, the two-dimensional (2D) noble metal nanosheets (NSs) have presented promising performance for various electrocatalytic reactions. Nevertheless, the heteroatom doping strategy, and in particular, the electronic structure tuning mechanisms of the 2D noble metal catalysts (NMCs) yet remain ambiguous. Herein, we first review several effective strategies for modulating the electrocatalytic performance of 2D NMCs. Then, the electronic tuning effect of hetero-dopants for boosting the electrocatalytic properties of 2D NMCs is systematically discussed. Finally, we put forward current challenges in the field of 2D NMCs, and propose possible solutions, particularly from the perspective of the evolution of electron microscopy. This review attempts to establish an intrinsic correlation between the electronic structures and the catalytic properties, so as to provide a guideline for designing high-performance electrocatalysts.

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Section: Morphology Engineeringmentioning

confidence: 99%

Recent advances of doping strategy for boosting the electrocatalytic performance of two-dimensional noble metal nanosheets

Wei,

Shen,

Wang

et al. 2024

Nanotechnology

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“…However, Ru exhibits oxyphilic properties at anodic potentials above 0.1 V compared to a reversible hydrogen electrode (RHE), leading to a decreased electrochemical HOR performance [10]. Several strategies have recently been developed to enhance the performance of Ru-based catalysts, including compositional effects [11][12][13], carrier effects [14][15][16][17], size effects [18,19], and structural effects [20,21]. In the case of loaded catalysts, they are usually overlooked when the particles are loaded or embedded in the carrier, which may result in underutilization of the active sites [22,23].…”

Section: Introductionmentioning

confidence: 99%

Porous Ruthenium–Tungsten–Zinc Nanocages for Efficient Electrocatalytic Hydrogen Oxidation Reaction in Alkali

Sun,

Cheng,

Liu

et al. 2024

Nanomaterials

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With the rapid development of anion exchange membrane technology and the availability of high-performance non-noble metal cathode catalysts in alkaline media, the commercialization of anion exchange membrane fuel cells has become feasible. Currently, anode materials for alkaline anion-exchange membrane fuel cells still rely on platinum-based catalysts, posing a challenge to the development of efficient low-Pt or Pt-free catalysts. Low-cost ruthenium-based anodes are being considered as alternatives to platinum. However, they still suffer from stability issues and strong oxophilicity. Here, we employ a metal–organic framework compound as a template to construct three-dimensional porous ruthenium–tungsten–zinc nanocages via solvothermal and high-temperature pyrolysis methods. The experimental results demonstrate that this porous ruthenium–tungsten–zinc nanocage with an electrochemical surface area of 116 m2 g−1 exhibits excellent catalytic activity for hydrogen oxidation reaction in alkali, with a kinetic density 1.82 times and a mass activity 8.18 times higher than that of commercial Pt/C, and a good catalytic stability, showing no obvious degradation of the current density after continuous operation for 10,000 s. These findings suggest that the developed catalyst holds promise for use in alkaline anion-exchange membrane fuel cells.

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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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Ammonia‐Induced FCC Ru Nanocrystals for Efficient Alkaline Hydrogen Electrocatalysis

Cited by 5 publications

References 59 publications

Recent advances of doping strategy for boosting the electrocatalytic performance of two-dimensional noble metal nanosheets

Recent advances of doping strategy for boosting the electrocatalytic performance of two-dimensional noble metal nanosheets

Porous Ruthenium–Tungsten–Zinc Nanocages for Efficient Electrocatalytic Hydrogen Oxidation Reaction in Alkali

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

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