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<p>In a certain effort to use first-row transition metal catalysts instead of noble metals (like Pd, Pt, Au and Ag), copper-based systems have emerged as versatile catalysts for reduction reactions. Copper(I) oxide has been less exploited due to a low control in its synthesis; in this context, copper(I) oxide nanoparticles supported on α-zirconium phosphate (Cu<sub>2</sub>O/α-ZrP) were introduced as a stable and recyclable catalyst for the selective reduction of 4-nitrophenol (4-NP) toward 4-aminophenol (4-AP) in water at room temperature, obeying the pseudo first-order kinetic model with a rate constant of 0.091&#xa0;min<sup>−1</sup>. The thermodynamic study shed light on the rate-limiting step rather than the diffusion-limited mechanism with an activation energy of 68.25&#xa0;kJ&#xa0;mol<sup>−1</sup>. The catalytic system’s structure was persevered after 3 cycles and the copper leaching was absent, setting a promising precedent for the development of α-ZrP-supported metal nanoparticle catalysts.</p>

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Copper(I) Oxide Supported on α-Zirconium Phosphate as a Stable and Recyclable Catalyst for Selective Reduction of 4-Nitrophenol

  • 期刊论文

  • 发表日期：

    2025年2月8日

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  • Trung-Hieu Tran,
  • Quoc-Huy Tran,
  • Hoa-Hung Lam,
  • Thi-An-Sa Do,
  • Phuc-Thanh-Duy Nguyen,
  • Thi-Kieu-Anh Tran,
  • Hong-Phuong Phan,
  • Antonio Reina,
  • Trung Dang-Bao

摘要

In a certain effort to use first-row transition metal catalysts instead of noble metals (like Pd, Pt, Au and Ag), copper-based systems have emerged as versatile catalysts for reduction reactions. Copper(I) oxide has been less exploited due to a low control in its synthesis; in this context, copper(I) oxide nanoparticles supported on α-zirconium phosphate (Cu2O/α-ZrP) were introduced as a stable and recyclable catalyst for the selective reduction of 4-nitrophenol (4-NP) toward 4-aminophenol (4-AP) in water at room temperature, obeying the pseudo first-order kinetic model with a rate constant of 0.091 min−1. The thermodynamic study shed light on the rate-limiting step rather than the diffusion-limited mechanism with an activation energy of 68.25 kJ mol−1. The catalytic system’s structure was persevered after 3 cycles and the copper leaching was absent, setting a promising precedent for the development of α-ZrP-supported metal nanoparticle catalysts.