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<p>A self-supported microsphere heterogeneous catalyst has been developed from a synthesized Ag(I)-imidazole coordination polymer (compound <b>1</b>), which was subsequently transformed into an Ag(0)-laden coordination polymer (compound <b>2</b>) through mild reduction with ascorbic acid. It is proposed that during the reduction process, a measurable fraction of silver ions (Ag(I)) undergo in-situ conversion into silver atoms (Ag(0)), forming uniformly distributed Ag(0) nano-clusters within the structural motif of <b>2</b>. Additionally, some Ag(0) atoms are suggested to retain the coordination environment of their precursor Ag(I) ions within the framework of <b>2</b>. The Ag(0)-laden microspheres in catalyst 2 exhibited exceptional zero-energy auto-catalytic decomposition of H<sub>2</sub>O<sub>2</sub> at room temperature under the working conditions. This approach offers a straightforward synthesis route for a self-supported Ag catalyst with significantly enhanced atomic efficiency, catalyst accessibility, and durability, eliminating the need for conventional supports such as silica or alumina.</p>

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Self-supported Ag(0) nanocatalyst derived from Ag(I)-based coordination polymer

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年9月23日

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  • Ahmad Baraka,
  • Mohamed H. Alkordi,
  • M. Gobara,
  • M. Nasr Ettish,
  • Mohamed Elbahy,
  • Osama Abuzalat

摘要

A self-supported microsphere heterogeneous catalyst has been developed from a synthesized Ag(I)-imidazole coordination polymer (compound 1), which was subsequently transformed into an Ag(0)-laden coordination polymer (compound 2) through mild reduction with ascorbic acid. It is proposed that during the reduction process, a measurable fraction of silver ions (Ag(I)) undergo in-situ conversion into silver atoms (Ag(0)), forming uniformly distributed Ag(0) nano-clusters within the structural motif of 2. Additionally, some Ag(0) atoms are suggested to retain the coordination environment of their precursor Ag(I) ions within the framework of 2. The Ag(0)-laden microspheres in catalyst 2 exhibited exceptional zero-energy auto-catalytic decomposition of H2O2 at room temperature under the working conditions. This approach offers a straightforward synthesis route for a self-supported Ag catalyst with significantly enhanced atomic efficiency, catalyst accessibility, and durability, eliminating the need for conventional supports such as silica or alumina.