Angewandte Chemie International Edition·· 4 小时前精选AI 评分58
聚乙炔包覆Pt/TiO2催化剂提升炔烃加氢选择性
Polyacetylene‐Decorated Pt/TiO 2 Catalyst for Highly Selective Hydrogenation of Alkynes
AI 导读
作者用温和的C2H2预处理在Pt/TiO2上原位生成trans-聚乙炔（PA）包覆层，使Pt纳米颗粒与Pt单原子共存于同一催化剂（Pt/TiO2-200C2H2）。PA向Pt位点给电子，促进H2解离活化并抑制Pt物种烧结团聚，从而提升多种炔烃加氢的活性与稳定性。DFT计算表明PA包覆提高了苯乙烯在Pt纳米颗粒和Pt单原子上的加氢能垒，抑制过度加氢、提高选择性。
推荐理由
原文给出乙炔预处理在Pt/TiO2上原位生成聚乙炔包覆层，并解释其给电子与提高加氢能垒的双重作用。
创新点
用C2H2单体在载体上原位聚合形成聚乙炔包覆层，把Pt纳米颗粒的高活性与Pt单原子的高选择性整合到同一催化剂中，并以聚合物给电子调控加氢能垒。
来源：Angewandte Chemie International Edition · doi.org
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