Correlating Alkaline Hydrogen Electrocatalysis and Hydroxide Binding Energies on Mo-Modified Ru Catalysts

Zhao, Yuanmeng; Wu, Dean; Luo, Wei

doi:10.1021/acssuschemeng.1c07306

Cited by 30 publications

(25 citation statements)

References 56 publications

(75 reference statements)

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“…Figure 3j shows a volcano‐type relationship between the HOR/HER activity and hydroxide binding energy (OHBE) value of Mo‐Ru in alkaline media, and Mo‐Ru‐2 with moderate OHBE strength is responsible to the enhanced HOR/HER activity. [ 61 ]…”

Section: Engineering Strategies Of Ru‐based Materialsmentioning

confidence: 99%

“…Figure 3j shows a volcano type relationship between the HOR/HER activity and hydroxide binding energy (OHBE) value of MoRu in alkaline media, and MoRu2 with moderate OHBE strength is responsible to the enhanced HOR/HER activity. [61] Figure 3. a) HAADF-STEM and corresponding energy dispersive spectroscopy (EDS) elemental mapping images of RuNi NSs.…”

Section: Metal Element Engineering Strategiesmentioning

confidence: 99%

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Recent Advances in Engineered Ru‐Based Electrocatalysts for the Hydrogen/Oxygen Conversion Reactions

Cao

Huo

et al. 2022

Advanced Energy Materials

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Figure 6. a,b) Structural simulation and HAADF-STEM of Ru-N/G SACs. c) Fourier transform magnitudes of the experimental Ru K-edge extended X-ray absorption fine structure (EXAFS) spectra of the Ru-N/G and other comparative samples.Reproduced with permission. [28] Copyright 2017, American Chemical Society. d) Structural simulation of Pt-Ru dimer dispersed on NCNT. e) ΔG H* plots for different H coverages. Reproduced with permission. [95] Copyright 2019, Nature Publishing Group. f) Schematic illustration of the synthesis of NiRu 0.13 -BDC by ion-exchange method. g) The simulated charge difference between NiRu 0.13 -BDC and Ni-BDC. Yellow represents charge accumulation and blue represents charge depletion. Reproduced with permission. [96] Copyright 2021, Nature Publishing Group. h) In situ X-ray absorption near edge structure (XANES) of Ru K-edge under OER electrochemical conditions. i) Gibbs free energy diagram during OER process on Ru/CoFe-LDHs. Reproduced with permission.

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Section: Engineering Strategies Of Ru‐based Materialsmentioning

confidence: 99%

Section: Metal Element Engineering Strategiesmentioning

confidence: 99%

Recent Advances in Engineered Ru‐Based Electrocatalysts for the Hydrogen/Oxygen Conversion Reactions

Cao

Huo

et al. 2022

Advanced Energy Materials

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“…The shape and morphology of nanorods and greater electrochemical and specific surface area effectively promoted the HER mechanism of the Hy-Sr(OH) 2 -200 nanorods. Owing to the larger specific surface area, porosity, hydroxyl ions, and nanorod-like morphology, the electrocatalyst of Hy-Sr(OH) 2 -200 nanorods revealed a greater number of active sites and promoted the adsorption and desorption process. ,− …”

Section: Resultsmentioning

confidence: 99%

Mesoporous Strontium Hydroxide Hydrate as a Nanostructure-Dependent Electrocatalyst for Hydrogen Evolution Reaction

Iqbal

Chen

Zhao

et al. 2022

ACS Appl. Nano Mater.

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Tremendous efforts have been directed to developing reliable electrocatalysts to gain clean hydrogen energy from water splitting and encounter energy challenges. The morphology at the nanoscale of electrocatalysts has also a significant influence on hydrogen evolution reaction. An alkaline-based electrocatalyst, strontium hydroxide hydrate, has been synthesized at temperatures of 80, 140, and 200 °C using the hydrothermal process. The employed growth temperature capably influences the morphology and intrinsic characteristics of the strontium hydroxide hydrate for the hydrogen evolution reaction. The mesoporous nature, greater electrochemical and specific surface area of nanorods, and facile proton donation by the acid jointly enhance the HER activity. Hy-Sr(OH)2-200 nanorods have exhibited a good overpotential of 84 mV in 0.5 M H2SO4 at the current density of 10 mA cm–2, which is better than the nanopallets (Hy-Sr(OH)2-80) and the hybrid morphology consisting of nanopallets and nanorods (Hy-Sr(OH)2-140). The mesoporous nature, greater electrochemical and specific surface area, and nanorod-like morphology have promoted and facilitated the adsorption and desorption of the active hydrogen atoms at the active sites inside the Hy-Sr(OH)2-200 nanorods. As a result, Hy-Sr(OH)2-200 nanorods exhibit the Tafel slope of 81 mV dec–1 in 0.5 M H2SO4 and follow the Volmer–Heyrovsky phenomena. Moreover, Hy-Sr(OH)2-200 nanorods show a good turnover frequency of 142.84 ms–1 at the fixed reversible hydrogen potential of 0.5 V, which is better than the other employed electrolytes and electrocatalysts fabricated at temperatures of 80 and 140 °C. The symmetric system, consisting of Hy-Sr(OH)2-200 nanorods, shows a good overpotential of 240 mV at a current density of 10 mA cm–2, along with a Tafel slope of 79 mV dec–1 in 0.5 M H2SO4. The electrocatalyst of Hy-Sr(OH)2-200 nanorods comprehensively exhibits good performance for the hydrogen evolution reaction.

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“…As a hydrogen catalysis electrocatalyst, however, the adsorption of reaction intermediates (H* and OH*) on Ru surfaces is not optimal enough to achieve satisfactory catalytic performance. 32,33 Optimal adsorption of H* and OH* could facilitate H-related catalysis. 34 In addition, enhanced H 2 O dissociation ability is beneficial for the HER in alkaline media.…”

Section: Introductionmentioning

confidence: 99%

Surface and lattice engineered ruthenium superstructures towards high-performance bifunctional hydrogen catalysis

Liu

Zhan

et al. 2023

Energy Environ. Sci.

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Correlating Alkaline Hydrogen Electrocatalysis and Hydroxide Binding Energies on Mo-Modified Ru Catalysts

Cited by 30 publications

References 56 publications

Recent Advances in Engineered Ru‐Based Electrocatalysts for the Hydrogen/Oxygen Conversion Reactions

Recent Advances in Engineered Ru‐Based Electrocatalysts for the Hydrogen/Oxygen Conversion Reactions

Mesoporous Strontium Hydroxide Hydrate as a Nanostructure-Dependent Electrocatalyst for Hydrogen Evolution Reaction

Surface and lattice engineered ruthenium superstructures towards high-performance bifunctional hydrogen catalysis

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