Orthorhombic (Ru, Mn)2O3: A superior electrocatalyst for acidic oxygen evolution reaction

Yin, Qinye; Cao, Bin; Zhou, Xiaoye; Xiao, Zhifeng; Zhou, Haoshen; Zhao, Zhenying; Weng, Yue; Lv, Jianshuai; Liu, Yang; He, Yan‐Bing; Kang, Feiyu; Li, Kaikai; Zhang, Tong‐Yi

doi:10.1016/j.nanoen.2023.108727

Cited by 19 publications

(4 citation statements)

References 49 publications

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“…This *O then partakes in a reaction with another water molecule, engendering *OOH. Culminating the cycle, the *OOH disintegrates to emancipate molecular oxygen, prepping the surface for subsequent iterations. , As depicted in Figure b, the calculated Gibbs free energies were ascertained. For the RuO 2 (110) facet, the deprotonation of *OH emerges as the rate-determining step (RDS), presenting an overpotential of 1.93 eV.…”

Section: Resultsmentioning

confidence: 99%

Molten Salt-Derived RuO₂ Nanocrystals and Nanowires: Unveiling Correlations of Morphology, Microstructure, and Electrocatalytic Performance

Zhang,

Qian,

Wei

et al. 2023

Inorg. Chem.

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Ruthenium oxide (RuO 2 ), due to its comparable binding energy with *H and cost-effectiveness against Pt, has emerged as a pivotal electrocatalyst for oxygen evolution reaction (OER). In the present study, RuO 2 nanocrystals (NCs) and nanowires (NWs) were obtained by a molten salt process and the morphology, crystal structure, and local bonding features were examined by using electron microscopy and X-ray absorption spectroscopy. From the electrochemical measurement, both RuO 2 NCs and NWs exhibit favorable stability and activity toward oxygen evolution reaction in an alkali medium, althought NCs exhibit higher activity, which is likely attributed to the larger surface area and the high local structural disorder. The theoretical calculation reveals that RuO 2 NWs with a primary (110) orientation show a higher overpotential due to its d-band center's proximity to the Fermi level versus (101). The present work suggests that the molten salt process could be an efficient method for producing metal oxide catalysts with tailorable geometry and performances.

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Section: Resultsmentioning

confidence: 99%

Molten Salt-Derived RuO₂ Nanocrystals and Nanowires: Unveiling Correlations of Morphology, Microstructure, and Electrocatalytic Performance

Zhang,

Qian,

Wei

et al. 2023

Inorg. Chem.

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“…One type involves loading single atoms and nanoparticles onto the same carbon substrates, 99–101 while in the other type, metal nanoparticles serve directly as the substrate for the single atoms, with their stability ensured through strong chemical bonding. 102,103 The typical structure models and features of each category are summarized and compared in Table 1. In addition to the structural considerations, we will also discuss the key challenges in fabricating these SA/NPCs.…”

Section: Categories and Construction Challenges Of Sa/npcsmentioning

confidence: 99%

Integrating single atoms with nanoparticle catalysts for efficient electrochemical energy conversion

Lin,

Zeng,

2024

J. Mater. Chem. A

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“…Table S2: ICP-OES analysis of dissolved Ru after stability test. Table S3: Comparison of OER activities between Mn-RuO 2 (300) and other electrocatalysts in acidic solutions [37][38][39][40][41][42][43][44][45][46][47]. Institutional Review Board Statement: Not applicable.…”

Section: Supplementary Materialsmentioning

confidence: 99%

Self–Supporting Mn–RuO2 Nanoarrays for Stable Oxygen Evolution Reaction in Acid

Deng,

Tang,

et al. 2023

Molecules

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Currently, the process of an acidic oxygen evolution reaction (OER) necessitates the use of Iridium dioxygen (IrO2), which is both expensive and incredibly scarce on Earth. Ruthenium dioxygen (RuO2) offers high activity for acidic OERs and presents a potential substitution for IrO2. Nevertheless, its practical application is hindered by its relatively poor stability. In this study, we have developed Mn–doped RuO2 (Mn–RuO2) nanoarrays that are anchored on a titanium (Ti) mesh utilizing a two–step methodology involving the preparation of MnO2 nanoarrays followed by a subsequent Ru exchange and annealing process. By precisely optimizing the annealing temperature, we have managed to attain a remarkably low overpotential of 217 mV at 10 mA cm−2 in a 0.5 M H2SO4 solution. The enhanced catalytic activity of our Mn–RuO2 nanoarrays can be attributed to the electronic modification brought about by the high exposure of active sites, Mn dopant, efficient mass transfer, as well as the efficient transfer of electrons between the Ti mesh and the catalyst arrays. Furthermore, these self–supported Mn–RuO2 nanoarrays demonstrated excellent long–term stability throughout a chronoamperometry test lasting for 100 h, with no discernible changes observed in the Ru chemical states.

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Orthorhombic (Ru, Mn)2O3: A superior electrocatalyst for acidic oxygen evolution reaction

Cited by 19 publications

References 49 publications

Molten Salt-Derived RuO₂ Nanocrystals and Nanowires: Unveiling Correlations of Morphology, Microstructure, and Electrocatalytic Performance

Molten Salt-Derived RuO₂ Nanocrystals and Nanowires: Unveiling Correlations of Morphology, Microstructure, and Electrocatalytic Performance

Integrating single atoms with nanoparticle catalysts for efficient electrochemical energy conversion

Self–Supporting Mn–RuO2 Nanoarrays for Stable Oxygen Evolution Reaction in Acid

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Orthorhombic (Ru, Mn)2O3: A superior electrocatalyst for acidic oxygen evolution reaction

Cited by 19 publications

References 49 publications

Molten Salt-Derived RuO2 Nanocrystals and Nanowires: Unveiling Correlations of Morphology, Microstructure, and Electrocatalytic Performance

Molten Salt-Derived RuO2 Nanocrystals and Nanowires: Unveiling Correlations of Morphology, Microstructure, and Electrocatalytic Performance

Integrating single atoms with nanoparticle catalysts for efficient electrochemical energy conversion

Self–Supporting Mn–RuO2 Nanoarrays for Stable Oxygen Evolution Reaction in Acid

Contact Info

Product

Resources

About

Molten Salt-Derived RuO₂ Nanocrystals and Nanowires: Unveiling Correlations of Morphology, Microstructure, and Electrocatalytic Performance

Molten Salt-Derived RuO₂ Nanocrystals and Nanowires: Unveiling Correlations of Morphology, Microstructure, and Electrocatalytic Performance