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Abstract <p>New double complex salts [Ir(NH<sub>3</sub>)<sub>6</sub>]<sub>4</sub>[Fe(CN)<sub>6</sub>]<sub>3</sub>·12H<sub>2</sub>O and [Rh(NH<sub>3</sub>)<sub>6</sub>]<sub>4</sub>[Fe(CN)<sub>6</sub>]<sub>3</sub>·12H<sub>2</sub>O were synthesized and structurally characterized for the first time. The thermal behavior of the synthesized salts in reducing (He/H<sub>2</sub>), inert (He), and oxidizing (Ar/O<sub>2</sub>) atmospheres was studied in detail. The final product of the decomposition of double complex salts [Ir(NH<sub>3</sub>)<sub>6</sub>]<sub>4</sub>[Fe(CN)<sub>6</sub>]<sub>3</sub>·12H<sub>2</sub>O in reducing and inert atmospheres is a mixture of face-centered cubic and hexagonal close-packed nanosized solid solutions of Ir-Fe and amorphous carbon. The decomposition of [Rh(NH<sub>3</sub>)<sub>6</sub>]<sub>4</sub>[Fe(CN)<sub>6</sub>]<sub>3</sub>·12H<sub>2</sub>O in the same atmospheres leads to the formation of a mixture of ordered and disordered Rh-Fe nanoalloys containing amorphous carbon. In an oxidizing atmosphere, a mixture of metal oxides and metallic iridium (or rhodium) is formed. Based on the data obtained, thermal decomposition of [Ir(NH<sub>3</sub>)<sub>6</sub>]<sub>4</sub>[Fe(CN)<sub>6</sub>]<sub>3</sub>·12H<sub>2</sub>O and [Rh(NH<sub>3</sub>)<sub>6</sub>]<sub>4</sub>[Fe(CN)<sub>6</sub>]<sub>3</sub>·12H<sub>2</sub>O can be considered as a method for producing nanoalloys or oxide systems based on iron and iridium (rhodium).</p>

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Synthesis, Crystal Structure, and Thermal Decomposition of [M(NH3)6]4[Fe(CN)6]3·12H2O (M = Ir, Rh) in Different Atmospheres

  • 期刊论文

  • 发表日期：

    2025年11月1日

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  • A. A. Popov,
  • P. E. Plyusnin,
  • L. S. Kibis,
  • T. S. Sukhikh,
  • S. V. Korenev

摘要

Abstract

New double complex salts [Ir(NH3)6]4[Fe(CN)6]3·12H2O and [Rh(NH3)6]4[Fe(CN)6]3·12H2O were synthesized and structurally characterized for the first time. The thermal behavior of the synthesized salts in reducing (He/H2), inert (He), and oxidizing (Ar/O2) atmospheres was studied in detail. The final product of the decomposition of double complex salts [Ir(NH3)6]4[Fe(CN)6]3·12H2O in reducing and inert atmospheres is a mixture of face-centered cubic and hexagonal close-packed nanosized solid solutions of Ir-Fe and amorphous carbon. The decomposition of [Rh(NH3)6]4[Fe(CN)6]3·12H2O in the same atmospheres leads to the formation of a mixture of ordered and disordered Rh-Fe nanoalloys containing amorphous carbon. In an oxidizing atmosphere, a mixture of metal oxides and metallic iridium (or rhodium) is formed. Based on the data obtained, thermal decomposition of [Ir(NH3)6]4[Fe(CN)6]3·12H2O and [Rh(NH3)6]4[Fe(CN)6]3·12H2O can be considered as a method for producing nanoalloys or oxide systems based on iron and iridium (rhodium).