Ru–Co Pair Sites Catalyst Boosts the Energetics for the Oxygen Evolution Reaction

Zheng, Xiaobo; Yang, Jiarui; Xu, Zhifeng; Wang, Qishun; Wu, Jiabin; Zhang, Erhuan; Dou, S. X.; Sun, Wenping; Wang, Dingsheng; Li, Yadong

doi:10.1002/anie.202205946

Cited by 253 publications

(146 citation statements)

References 69 publications

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“…As depicted in Figure b, the Ru K-edge XANES spectra confirmed the changes in the oxidation state of Ru in Ru NPs/NC. Specifically, with the increase of the N content and electron transfer at the interface, the absorption edge shifted to the lower energy direction, and the peak of the white line gradually decreased, indicating the decrease of the valence state . In Figure c, EXAFS oscillations of Ru NPs/NC exhibited smaller amplitudes than that of Ru foil due to the finite size effect of metal nanoparticles .…”

Section: Results and Discussionmentioning

confidence: 90%

“…Specifically, with the increase of the N content and electron transfer at the interface, the absorption edge shifted to the lower energy direction, and the peak of the white line gradually decreased, indicating the decrease of the valence state. 45 In Figure 2c, EXAFS oscillations of Ru NPs/NC exhibited smaller amplitudes than that of Ru foil due to the finite size effect of metal nanoparticles. 46 Moreover, the slightly longer periods of Ru NPs/NC-900 than that of Ru NPs/NC-800 and Ru NPs/NC-1000 were attributed to shorter distances between central Ru atoms and surrounding coordinated Ru atoms, indicating the lattice compressive strain of NPs.…”

Section: ■ Results and Discussionmentioning

confidence: 97%

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Lattice Strain and Schottky Junction Dual Regulation Boosts Ultrafine Ruthenium Nanoparticles Anchored on a N-Modified Carbon Catalyst for H₂ Production

et al. 2022

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Ruthenium-based materials are considered great promising candidates to replace Pt-based catalysts for hydrogen production in alkaline conditions. Herein, we adopt a facile method to rationally design a neoteric Schottky catalyst in which uniform ultrafine ruthenium nanoparticles featuring lattice compressive stress are supported on nitrogen-modified carbon nanosheets (Ru NPs/NC) for efficient hydrogen evolution reaction (HER). Lattice strain and Schottky junction dual regulation ensures that the Ru NPs/NC catalyst with an appropriate nitrogen content displays superb H 2 evolution in alkaline media. Particularly, Ru NPs/NC-900 with 1.3% lattice compressive strain displays attractive activity and durability for the HER with a low overpotential of 19 mV at 10 mA cm −2 in 1.0 M KOH electrolyte. The in situ X-ray absorption fine structure measurements indicate that the low-valence Ru nanoparticle with shrinking Ru−Ru bond acts as catalytic active site during the HER process. Furthermore, multiple spectroscopy analysis and density functional theory calculations demonstrate that the lattice strain and Schottky junction dual regulation tunes the electron density and hydrogen adsorption of the active center, thus enhancing the HER activity. This strategy provides a novel concept for the design of advanced electrocatalysts for H 2 production.

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Section: Results and Discussionmentioning

confidence: 90%

Section: ■ Results and Discussionmentioning

confidence: 97%

Lattice Strain and Schottky Junction Dual Regulation Boosts Ultrafine Ruthenium Nanoparticles Anchored on a N-Modified Carbon Catalyst for H₂ Production

et al. 2022

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“…However, to the best of our knowledge, the rare-earth M–N 4 moiety with coordination unsaturated metal atoms exhibits high absorption electrocatalysis, which has not been explored yet in battery systems. Given numerous degrees of freedom for adjusting the metal center and local atomic environments of single-atom catalysts, a conventional trial-and-error strategy significantly slows down the development of SACs in electrochemical energy storage and conversion. , Therefore, more efforts should be made for a more advanced and efficient design strategy of rare-earth metal-based single atoms in Na–S battery applications.…”

Section: Introductionmentioning

confidence: 99%

“…Given numerous degrees of freedom for adjusting the metal center and local atomic environments of single-atom catalysts, a conventional trial-and-error strategy significantly slows down the development of SACs in electrochemical energy storage and conversion. 39,40 Therefore, more efforts should be made for a more advanced and efficient design strategy of rare-earth metal-based single atoms in Na−S battery applications.…”

Section: Introductionmentioning

confidence: 99%

Single-Atom Yttrium Engineering Janus Electrode for Rechargeable Na–S Batteries

et al. 2022

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The development of rechargeable Na–S batteries is very promising, thanks to their considerably high energy density, abundance of elements, and low costs and yet faces the issues of sluggish redox kinetics of S species and the polysulfide shuttle effect as well as Na dendrite growth. Following the theory-guided prediction, the rare-earth metal yttrium (Y)–N4 unit has been screened as a favorable Janus site for the chemical affinity of polysulfides and their electrocatalytic conversion, as well as reversible uniform Na deposition. To this end, we adopt a metal–organic framework (MOF) to prepare a single-atom hybrid with Y single atoms being incorporated into the nitrogen-doped rhombododecahedron carbon host (Y SAs/NC), which features favorable Janus properties of sodiophilicity and sulfiphilicity and thus presents highly desired electrochemical performance when used as a host of the sodium anode and the sulfur cathode of a Na–S full cell. Impressively, the Na–S full cell is capable of delivering a high capacity of 822 mAh g–1 and shows superdurable cyclability (97.5% capacity retention over 1000 cycles at a high current density of 5 A g–1). The proof-of-concept three-dimensional (3D) printed batteries and the Na–S pouch cell validate the potential practical applications of such Na–S batteries, shedding light on the development of promising Na–S full cells for future application in energy storage or power batteries.

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“…The band gap of Ru 1 /V Co -Co(OH) 2 was 0.26 eV, which was narrower than that of Ru 1 /Co(OH) 2 (0.62 eV). The narrower band gap of Ru 1 /V Co -Co(OH) 2 indicated that the existence of neighboring Co 2+ vacancies enhanced the electronic conductivity, which facilitated charge transfer and OER dynamics. − …”

Section: Results and Discussionmentioning

confidence: 99%

Neighboring Cationic Vacancy Assisted Adsorption Optimization on Single-Atom Sites for Improved Oxygen Evolution

et al. 2022

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Single-atom catalysts with particular electronic and geometric microenvironments provide an atomic-scale perspective for research into the mechanism of catalysis. Designing the neighboring geometry of single-atom catalysts can tailor the adsorption configuration of reaction intermediates and enhance their activity in catalytic reactions. In this work, we proposed a neighboring cationic vacancy strategy in single-atom Ru catalysts to adjust the adsorption configuration of reaction intermediates for improved oxygen evolution performance. An Ru single-atom catalyst with neighboring Co2+ vacancies (Ru1/VCo-Co(OH)2) showed better OER performance than a catalyst without Co2+ vacancies (Ru1/Co(OH)2). The mass activity of Ru1/VCo-Co(OH)2 was calculated to be 6688 A g–1 at 300 mV overpotential, which was 4.73 times higher than that of Ru1/Co(OH)2. Particularly, the mass activity of Ru1/VCo-Co(OH)2 was notably 481.15 times higher than that of commercial RuO2. Both in situ ATR-FTIR spectroscopy measurements and DFT calculations manifested that the existence of neighboring Co2+ vacancies modulated the adsorption configuration of *OOH intermediates on atomic Ru sites by hydrogen bonding, which reduced the energy barrier of rate-determining steps and improved the OER activity.

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Ru–Co Pair Sites Catalyst Boosts the Energetics for the Oxygen Evolution Reaction

Cited by 253 publications

References 69 publications

Lattice Strain and Schottky Junction Dual Regulation Boosts Ultrafine Ruthenium Nanoparticles Anchored on a N-Modified Carbon Catalyst for H₂ Production

Lattice Strain and Schottky Junction Dual Regulation Boosts Ultrafine Ruthenium Nanoparticles Anchored on a N-Modified Carbon Catalyst for H₂ Production

Single-Atom Yttrium Engineering Janus Electrode for Rechargeable Na–S Batteries

Neighboring Cationic Vacancy Assisted Adsorption Optimization on Single-Atom Sites for Improved Oxygen Evolution

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Ru–Co Pair Sites Catalyst Boosts the Energetics for the Oxygen Evolution Reaction

Cited by 253 publications

References 69 publications

Lattice Strain and Schottky Junction Dual Regulation Boosts Ultrafine Ruthenium Nanoparticles Anchored on a N-Modified Carbon Catalyst for H2 Production

Lattice Strain and Schottky Junction Dual Regulation Boosts Ultrafine Ruthenium Nanoparticles Anchored on a N-Modified Carbon Catalyst for H2 Production

Single-Atom Yttrium Engineering Janus Electrode for Rechargeable Na–S Batteries

Neighboring Cationic Vacancy Assisted Adsorption Optimization on Single-Atom Sites for Improved Oxygen Evolution

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Lattice Strain and Schottky Junction Dual Regulation Boosts Ultrafine Ruthenium Nanoparticles Anchored on a N-Modified Carbon Catalyst for H₂ Production

Lattice Strain and Schottky Junction Dual Regulation Boosts Ultrafine Ruthenium Nanoparticles Anchored on a N-Modified Carbon Catalyst for H₂ Production