Topochemical Synthesis and Formation Mechanism of Garnet Multimetal Fluorides

IF 9.6 1区化学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY ACS Materials Letters Pub Date : 2024-10-31 DOI:10.1021/acsmaterialslett.4c0169010.1021/acsmaterialslett.4c01690

Keshav Kumar, Prabhat Thapliyal, Divya Bhutani, Rinya Rubu, Shubham Kumar Debadatta, Sheetal Kumar Jain and Premkumar Senguttuvan*,

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Abstract

The synthesis of multimetal fluorides (MMFs) is challenged by the usage of toxic fluoride precursors and their thermodynamic instability at higher temperatures. Here, we demonstrate a new topochemical reaction pathway to tailor garnet-type single- and multimetal fluorides from double perovskite (DP) hosts. Our combined X-ray diffraction, Fourier-transformed infrared, and nuclear magnetic spectroscopic techniques reveal the transformation pathway as DP-(NH₄)₃(M/M′)³⁺F₆ to DP-(NH₄)₂(Na/Li)(M/M′)³⁺F₆ to garnet-Na₃Li₃(M/M′)₂F₁₂ ((M/M′)³⁺ = Al³⁺, Fe³⁺, Cr³⁺ and V³⁺) through ion-exchange reaction between NH₄⁺ and Li⁺/Na⁺ ions. The garnet MMF-Na₃Li₃(Fe_0.33Cr_0.33V_0.33)₂F₁₂ catalyst displays ultralow overpotential (η₅₀₀ of 245 mV) with higher durability.

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来源期刊

ACS Materials Letters MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

14.60

自引率

3.50%

发文量

261

期刊介绍： ACS Materials Letters is a journal that publishes high-quality and urgent papers at the forefront of fundamental and applied research in the field of materials science. It aims to bridge the gap between materials and other disciplines such as chemistry, engineering, and biology. The journal encourages multidisciplinary and innovative research that addresses global challenges. Papers submitted to ACS Materials Letters should clearly demonstrate the need for rapid disclosure of key results. The journal is interested in various areas including the design, synthesis, characterization, and evaluation of emerging materials, understanding the relationships between structure, property, and performance, as well as developing materials for applications in energy, environment, biomedical, electronics, and catalysis. The journal has a 2-year impact factor of 11.4 and is dedicated to publishing transformative materials research with fast processing times. The editors and staff of ACS Materials Letters actively participate in major scientific conferences and engage closely with readers and authors. The journal also maintains an active presence on social media to provide authors with greater visibility.

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