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<p>Efficient n-butane dehydrogenation is a promising route for producing value-added C<sub>4</sub> olefins. In this study, PdSn bimetallic catalysts were synthesized by cyclic electroless deposition on surfactant-modified alumina, zeolite, and silica gel supports. XRD, TEM, EDX, and BET analyses confirmed highly dispersed Pd and Sn species, nanosized metal clusters, successful metal deposition, and support-dependent textural properties. Sn incorporation improved Pd dispersion and enhanced catalytic activity compared with monometallic Pd catalysts. Among the prepared catalysts, PdSn/Sl exhibited the best performance at 550&#xa0;°C, achieving 68.3% n-butane conversion, 35.4% n-butene yield, and 32.9% iso-butene yield. Time-on-stream analysis showed a deactivation rate of 9.66% after 24&#xa0;h, indicating reasonable catalytic stability. Spent-catalyst TG-DTA and XRD analyses further suggested moderate coke deposition and structural stability after reaction. These results demonstrate that electroless-deposited PdSn/Sl is a promising catalyst for efficient n-butane dehydrogenation to butenes.</p> Graphical Abstract <p></p>

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PdSn Bimetallic Catalysts Prepared by Electroless Deposition for Enhanced n-Butane Dehydrogenation to Butenes

  • 期刊论文

  • 发表日期：

    2026年7月23日

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  • Hemant K. Nayak,
  • Pramod M. Gawal

摘要

Efficient n-butane dehydrogenation is a promising route for producing value-added C4 olefins. In this study, PdSn bimetallic catalysts were synthesized by cyclic electroless deposition on surfactant-modified alumina, zeolite, and silica gel supports. XRD, TEM, EDX, and BET analyses confirmed highly dispersed Pd and Sn species, nanosized metal clusters, successful metal deposition, and support-dependent textural properties. Sn incorporation improved Pd dispersion and enhanced catalytic activity compared with monometallic Pd catalysts. Among the prepared catalysts, PdSn/Sl exhibited the best performance at 550 °C, achieving 68.3% n-butane conversion, 35.4% n-butene yield, and 32.9% iso-butene yield. Time-on-stream analysis showed a deactivation rate of 9.66% after 24 h, indicating reasonable catalytic stability. Spent-catalyst TG-DTA and XRD analyses further suggested moderate coke deposition and structural stability after reaction. These results demonstrate that electroless-deposited PdSn/Sl is a promising catalyst for efficient n-butane dehydrogenation to butenes.

Graphical Abstract