Engineering Ru(IV) charge density in Ru@RuO2 core-shell electrocatalyst via tensile strain for efficient oxygen evolution in acidic media

Yao, Wen; Yang, Tao; Cheng, Chuanqi; Zhao, Xinbing; Liu, Enzuo; Yang, Jing

doi:10.1016/s1872-2067(20)63543-4

Cited by 55 publications

(26 citation statements)

References 22 publications

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“…A Ru core RuO 2 shell (Ru@RuO 2 -L) catalyst is synthesized by laser irradiation of commercial RuO 2 powers and a near 6% tensile strain is observed on RuO 2 shell. [212] The OER overpotential of Ru@RuO 2 -L (191 mV) is smaller than the overpotential of RuO 2 (280 mV) with no strain, which proved the acceleration effect of tensile strain in RuO 2 toward OER.…”

Section: Oxygen Evolution Reactionmentioning

confidence: 82%

Strain Engineering in Electrocatalysts: Fundamentals, Progress, and Perspectives

Yang

Wang

Tong

et al. 2021

Advanced Energy Materials

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sive utilization of fossil fuels. The design and development of efficient, economic, and sustainable strategies to convert clean energy (e.g., solar energy, wind energy, and hydropower energy) is thus of great significance. Among various available strategies, electrochemical energy conversion technologies have been attracted extreme attention. They mainly include (photo)electrochemical reduction of atmosphere-rich and greenhouse gas-carbon dioxideinto high value-added chemicals or liquid fuels under mild reaction conditions, electrosynthesis of NH 3 with low energy consumption to substitute the Haber method, electrochemical overall water splitting, and different kinds of fuel cells. By use of these electrochemical energy conversion technologies, it is believed that both the issues of energy shortage and environmental pollution are promising to be solved, eventually creating a globalized system with a sustainable energy circle for our society in the future (Figure 1). [1][2][3][4][5][6][7] To achieve efficient electrochemical conversion technologies, high-performance electrochemical conversion platforms need to be initialized, where electrocatalysts are frequently required. An electrocatalyst actually plays a vital role in the determination and further improvement of reaction rate, efficiency, and selectivity of different electrochemical transformations. In terms of its catalytic performance, the most crucial factors are generally considered as the amount of its active sites, the intrinsic activity of each active site, and the total efficiency of these active sites. [8] It is well-known that the amount of active sites of an electrocatalyst and its electrocatalytic efficiency can be increased through enlarging the surface area of an electrocatalyst, for example by means of synthesizing a nanostructured catalyst (e.g., nanosheets, [9] nanowires, [10] nanopores, [11][12][13] and coreshell structures [14,15] ). Meanwhile, the intrinsic activity of each catalytic site basically follows the Sabatier principle, [16][17][18][19][20] which is closely related to the ability of an electrocatalyst to weaken or strengthen the binding energies with reactants, reaction intermediates, and/or products. For example, when the free energy of hydrogen adsorption (ΔG H ) on the active sites of an electrocatalyst remains at a moderate strength, this catalyst exhibits the highest catalytic activity toward hydrogen evolution reaction (HER). In contrast, too strong or too weak ΔG H on the active sites of an electrocatalyst precludes the HER. [21][22][23] Among numerous electrocatalysts, multiple metal components based electrocatalysts have been extensively utilized in Strain engineering of nanomaterials, namely, designing, tuning, or controlling surface strains of nanomaterials is an effective strategy to achieve outstanding performance in different nanomaterials for their various applications. This article summarizes recent progress and achievements in the development of strain-rich electrocatalysts (SREs) and their applications in the fi...

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Section: Oxygen Evolution Reactionmentioning

confidence: 82%

Strain Engineering in Electrocatalysts: Fundamentals, Progress, and Perspectives

Yang

Wang

Tong

et al. 2021

Advanced Energy Materials

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“…Except for introducing alien atoms, the strain effect could also be a feasible method to adjust the electronic structure of alloy catalysts. Wen et al 40 introduced tensile strain into RuO 2 shell of Ru@RuO 2 core‐shell structure (Ru@RuO 2 ‐L) through irradiating commercial RuO 2 powders (RuO 2 ‐C) by laser. TEM images of Ru@RuO 2 ‐L and RuO 2 ‐C revealed an obvious decrease from 0.338 nm to 0.318 nm for lattice space of RuO 2 (110) facet, preliminarily indicating the RuO 2 shell possessed tensile strain.…”

Section: Recent Development Of Ru‐based Materials For Oer In Acidic Mediamentioning

confidence: 99%

“…(A) FT EXAFS spectra, Ru 3p XPS spectra, and Ru M‐edge EELS spectra of Ru@RuO 2 ‐L, Ru@RuO 2 ‐A, and RuO2‐A, Ru@RuO 2 ‐H, and RuO 2 ‐C. (A) Reproduced from Reference 40 with permission from Elsevier. (B) The defective RuO 2 structure from top view.…”

Section: Recent Development Of Ru‐based Materials For Oer In Acidic Mediamentioning

confidence: 99%

Novel engineering of ruthenium‐based electrocatalysts for acidic water oxidation: A mini review

Zhou

Zhang

et al. 2021

Engineering Reports

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The oxygen evolution reaction (OER) is pivotally involved in proton exchange membrane water electrolyzers (PEMWEs). However, the commercialized iridium‐based catalysts often suffer from severe sluggish kinetics, eventually deteriorating the polarization and overall PEMWEs performance. Therefore, to develop OER electrocatalysts with promising reaction kinetics and high stability is of great significance for PEMWEs. Compared to iridium, the ruthenium‐based catalysts possess lower price and higher activity in acidic water oxidation, which promises Ru‐based materials to replace the state‐of‐the‐art IrOx. Yet, the less stable ruthenium than iridium impedes its real applications. In this mini review, recent knowledge of feasible engineering strategies for migrating the Ru‐based electrocatalysts' stability is summarized. In order to improve performance and durability, basic fundamentals of acidic OER on nanoscale and molecular engineered Ru‐based electrocatalysts are briefly introduced. In the end, the challenges and outlook for engineering novel Ru‐based electrocatalysts are presented.

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“…10–13 However, the electrocatalytic efficiency is limited by the sluggish reaction kinetics on the electrodes, especially the oxygen evolution reaction (OER). 14–19 At present, Ru-based nanomaterials are the most efficient electrocatalysts to overcome the energy barriers. 20,21 Nevertheless, the high cost combined with scarcity prevented their further large-scale implementation.…”

Section: Introductionmentioning

confidence: 99%

An in situ generated 3D porous nanostructure on 2D nanosheets to boost the oxygen evolution reaction for water-splitting

Chen

Zhao

et al. 2022

Nanoscale

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Engineering Ru(IV) charge density in Ru@RuO2 core-shell electrocatalyst via tensile strain for efficient oxygen evolution in acidic media

Cited by 55 publications

References 22 publications

Strain Engineering in Electrocatalysts: Fundamentals, Progress, and Perspectives

Strain Engineering in Electrocatalysts: Fundamentals, Progress, and Perspectives

Novel engineering of ruthenium‐based electrocatalysts for acidic water oxidation: A mini review

An in situ generated 3D porous nanostructure on 2D nanosheets to boost the oxygen evolution reaction for water-splitting

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