Engineering the Electronic Structure of Single Atom Ru Sites via Compressive Strain Boosts Acidic Water Oxidation Electrocatalysis

Yao, Yancai

doi:10.1007/978-981-19-0205-5_3

Cited by 26 publications

(34 citation statements)

References 57 publications

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“…In addition to bimetallic SAAs, multi‐metal SAAs were also reported. In a recent work by Li and colleagues, Ru SAs were well‐dispersed in Pt‐Cu alloys by adopting acid etching and electrochemical leaching 290 . Moreover, the Ru sites embedded in Pt‐Cu alloy delivered a prolonged catalytic activity and stability.…”

Section: Strategies For Fabrication Of Smacsmentioning

confidence: 99%

“…In a recent work by Li and colleagues, Ru SAs were well-dispersed in Pt-Cu alloys by adopting acid etching and electrochemical leaching. 290 Moreover, the Ru sites embedded in Pt-Cu alloy delivered a prolonged catalytic activity and stability. This enhancement was shown to arise from the electron reservoir of alloy support to provide electrons during the catalytic process and saving Ru species from oxidization and dissolution.…”

Section: Alloyingmentioning

confidence: 99%

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Single metal atoms catalysts—Promising candidates for next generation energy storage and conversion devices

Lei

Sathish

Liu

et al. 2022

EcoMat

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Single-metal-atom catalysts (SMACs) with the merits of maximum atom utilization, peculiar electronic structure, and adjustable coordination environment, have emerged as the rising stars. They are not only regarded as the promising electrocatalysts, but also show unconventionally excellent alkali storage, thus enabling them for energy devices. In this work, we review the up-to-date progress of single metal atom catalysts including the detailed synthetic strategies and all sorts of applications in energy storage and conversion. In addition, we also discuss intrinsic catalytic effects, degradation mechanism, modulation approaches, support structure design, current challenges, and potential development trends. This work may shed light on developing high-performance SMACs using a variety of strategies for catalytic and energy applications.

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Section: Strategies For Fabrication Of Smacsmentioning

confidence: 99%

Section: Alloyingmentioning

confidence: 99%

Single metal atoms catalysts—Promising candidates for next generation energy storage and conversion devices

Lei

Sathish

Liu

et al. 2022

EcoMat

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“…Furthermore, regulating the electronic structure of metal centers in single-atomic-site electrocatalysts has proven to be an efficient way to enhance the intrinsic activity of SAs. [30][31][32] Alternatively, the electronic structure of Ru sites in Ru-N or Ru-C structures can be regulated by nearby Ru NCs to further improve the HER activity. 33,34 Our previous work confirmed that the coexistence of CDs and Ru NPs significantly enhances hydrogen generation.…”

Section: Introductionmentioning

confidence: 99%

“…Metals can promote the thermal stability of molecular precursors and assist in forming thermally stable polymeric intermediates during the carbonization process, which guarantees the successful preparation of carbons at a high yield. Furthermore, regulating the electronic structure of metal centers in single‐atomic‐site electrocatalysts has proven to be an efficient way to enhance the intrinsic activity of SAs 30–32 . Alternatively, the electronic structure of Ru sites in Ru‐N or Ru‐C structures can be regulated by nearby Ru NCs to further improve the HER activity 33,34 .…”

Section: Introductionmentioning

confidence: 99%

Engineering the synergistic effect of carbon dots‐stabilized atomic and subnanometric ruthenium as highly efficient electrocatalysts for robust hydrogen evolution

Liu

Chen

et al. 2021

SmartMat

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Currently, the most efficient electrocatalyst for the hydrogen evolution reaction (HER) in water dissociation is Pt-based catalyst. Unfortunately, the high cost and less than perfect efficiency hinder wide-range industrial/technological applications. Here, by controlling the treatment temperature of tris (2,2-bipyridine) ruthenium dichloride hexahydrate, synthesis of compounds with novel ruthenium single/dual atoms (Ru S/DAs) mixed with Ru nanoclusters (Ru S/DAs + Ru NCs) and supported by carbon dots is demonstrated. These compounds are shown to be highly efficient and competitive catalysts for hydrogen evolution. Ru S/DAs + Ru NCs exhibit very high activity, with overpotentials of 15 and 40 mV at a current density of 10 mA/cm 2 in 1.0 mol/L KOH and 0.5 mol/L H 2 SO 4 , respectively. Furthermore, the composites are found to possess outstanding stability and rapid HER kinetics. X ray absorption fine structure analysis, supported by density functional theory calculations, shows charge rearrangement in single-atomic Ru, and the Ru dual sites promote active hydrogen adsorption and recombination. Ru S/DAs and Ru NCs demonstrate high electroactivity due to the electroactive Ru 4d orbitals. The introduction of Ru NCs activates the carbon support, providing a high electronic conductivity to transfer electrons from Ru NCs to Ru S/DAs, and facilitates water dissociation for the HER process.

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“…Recent literature found that the perfect surface of MoSi 2 N 4 is inert to the hydrogen evolution reaction and oxygen evolution reaction, 35 which means that other modification methods such as vacancy and strain may be needed in experiments. 35,39 As the built-in electric field and type-II band alignment are realized, this will in turn call into play the prolonged lifetime of photogenerated carriers and favorable for photocatalysts, but to what extent in the context of stacking engineered polarized multilayers remains an open question. To quantitatively analyze the lifetime of photogenerated electron−hole recombination, herein, the evolutions of state populations of the excited electrons are calculated using time-domain density functional theory combined with NAMD.…”

mentioning

confidence: 99%

Stacking Engineering: A Boosting Strategy for 2D Photocatalysts

Zhao

et al. 2021

J. Phys. Chem. Lett.

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Two-dimensional (2D) photocatalytic material is a vital project for modern solar energy conversion and storage. Despite a vast family of potential 2D photocatalysts that is demonstrated, their commercial applications are severely limited because of fast photogenerated electron–hole recombination. Here, based on first-principles, we propose a general paradigm to boost the separation of photoexcited charge carriers in 2D photocatalysts by stacking engineering. Taking the emerging water splitting photocatalyst MoSi2N4 as an example, we show that specific interlayer stacking-induced electric polarization plays a significant role in altering the electronic properties and thus the suppressed recombination rate of photoexcited carriers. Moreover, we find that the catalytic performance can be further controlled by vertical strain. These generalized findings not only highlight the importance of stacking-induced electric polarization but also offer new prospects for the design and application of 2D photocatalysts.

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Engineering the Electronic Structure of Single Atom Ru Sites via Compressive Strain Boosts Acidic Water Oxidation Electrocatalysis

Cited by 26 publications

References 57 publications

Single metal atoms catalysts—Promising candidates for next generation energy storage and conversion devices

Single metal atoms catalysts—Promising candidates for next generation energy storage and conversion devices

Engineering the synergistic effect of carbon dots‐stabilized atomic and subnanometric ruthenium as highly efficient electrocatalysts for robust hydrogen evolution

Stacking Engineering: A Boosting Strategy for 2D Photocatalysts

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