MXene- and MOF-based single-atom catalysts for next-generation batteries chemistry: A synergy of experimental and theoretical insights

Vallem, Sowjanya; Venkateswarlu, Sada; Li, Yang; Song, Seunghyun; Li, Man; Bae, Joonho

doi:10.1016/j.ensm.2023.103159

Cited by 3 publications

(1 citation statement)

References 240 publications

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“…Hydrogen is a carbon-free and environmentally benign energy carrier that could be efficiently produced through electrochemical hydrogen evolution reaction (HER) by water splitting [1][2][3][4][5]. While significant progress has been made in acidic operations, alkaline hydrogen evolution is preferred in industrial settings for improved corrosion resistance and higher hydrogen purity.…”

Section: Introductionmentioning

confidence: 99%

Synergistic effect between Co single atoms and Pt nanoparticles for efficient alkaline hydrogen evolution

Shu,

Cao,

Gan

et al. 2024

Mater. Futures

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In the pursuit of sustainable energy solutions, the efficiency of the hydrogen evolution reaction (HER) in alkaline conditions has been a significant challenge, primarily due to the sluggish dissociation of water molecules on platinum (Pt) catalysts. Addressing this critical issue, our study introduces an innovative Pt-Co@NCS catalyst. This catalyst synergistically combines Pt nanoparticles with Co single atoms on a nitrogen-doped carbon scaffold, overcoming the traditional bottleneck of slow water dissociation. Its unique porous concave structure and nitrogen-enriched surface not only provide abundant anchoring sites for Co atoms but also create a conducive hydrophilic environment around the Pt particles. This design leads to a drastic improvement in the water dissociation process, as demonstrated by CO stripping and deuterium labeling experiments. Achieving an outstanding current density of 162.8 mA cm-2 at -0.1 V versus RHE, a Tafel slope of 26.2 mV dec-1, and a superior nominal mass activity of 15.75 mA μgPt-1, the Pt-Co@NCS catalyst represents a significant step forward in enhancing alkaline HER efficiency, indicating promising advancements in the field.

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Section: Introductionmentioning

confidence: 99%

Synergistic effect between Co single atoms and Pt nanoparticles for efficient alkaline hydrogen evolution

Shu,

Cao,

Gan

et al. 2024

Mater. Futures

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Sustainable ZIF‐67/Mo‐MXene‐Derived Nanoarchitecture Synthesis: An Enhanced Durable Performance of Lithium–Selenium Batteries

Vallem,

Song,

et al. 2024

Small Methods

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Selenium‐based electrodes have garnered attention for their high electrical conductivity, compatibility with carbonate electrolytes, and volumetric capacity comparable to sulfur electrodes. However, real‐time application is hindered by rapid capacity deterioration from the “shuttle effect” of polyselenides and volume fluctuations. To address these challenges, a hybrid Se@ZIF‐67/Mo‐MXene‐derived (Se@Co‐NC/Mo2C) nanoarchitecture is developed via an economically viable in situ electrostatic self‐assembly of ZIF‐67 and Mo2C nanosheets. The catalytic effects and porous framework of Co‐NC/Mo2C enhance electrode attributes, promoting superior adsorption and conversion of lithium polyselenides and facile ion/electron transport within the electrode, resulting in stable electrochemical performance. Lithium–selenium batteries (LSeBs) exhibit remarkable characteristics, boasting high specific capacity and exceptional durability. The Se@Co‐NC/Mo2C electrode delivers a reversible capacity of 503.5 mAh g−1 at 0.5 C with 98% capacity retention, 100% Coulombic efficiency, and exceptional cyclic durability through 8600 cycles. In sustainability tests at 10C/1C charging/discharging, the Se@Co‐NC/Mo2C electrode demonstrates an optimistic and stable capacity of ≈370.6 mAh g−1 with 93% capacity retention at the 3100th cycle in a carbonate‐based electrolyte and ≈181.3 mAh g−1 with 92% capacity retention after 5000 cycles in an ether‐based electrolyte, indicating exceptional stability for practical rechargeable batteries. This cost‐effective and efficient approach holds significant potential for high‐performance and durable LSeBs.

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Flexible MXene-conjugated polymer nanoarchitectures: Current developments and future frontiers in battery technology

Vallem,

Venkateswarlu,

Song

et al. 2024

Coordination Chemistry Reviews

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MXene- and MOF-based single-atom catalysts for next-generation batteries chemistry: A synergy of experimental and theoretical insights

Cited by 3 publications

References 240 publications

Synergistic effect between Co single atoms and Pt nanoparticles for efficient alkaline hydrogen evolution

Synergistic effect between Co single atoms and Pt nanoparticles for efficient alkaline hydrogen evolution

Sustainable ZIF‐67/Mo‐MXene‐Derived Nanoarchitecture Synthesis: An Enhanced Durable Performance of Lithium–Selenium Batteries

Flexible MXene-conjugated polymer nanoarchitectures: Current developments and future frontiers in battery technology

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