摘要：Highly dispersed PtNi bimetallic sites were constructed on γ-Al2O3 through a nickel doping strategy for selective pyridine hydrogenation. Optimal Ni doping promoted active site exposure, optimized reactant diffusion pathways, and influenced pyridine adsorption via electronic microenvironment modulation. The Pt-Ni electronic synergy was maintained while suppressing C–N bond hydrogenolysis through surface adsorption barrier control. Density functional theory (DFT) calculations confirmed reduced piperidine desorption energy barriers due to Ni doping. Under continuous flow conditions (453 K, 3.5 MPa, H2/oil 500:1, LHSV 3 h?1), Pt3Ni1/Al2O3 achieved 87.9 % pyridine conversion and 96 % piperidine selectivity. The enhanced performance originated from highly dispersed bimetallic sites, optimized acid distribution, and electronic synergy, providing a new idea for the selective hydrogenation of heterocyclic compounds. ? 2025 Elsevier Ltd

ISSN号：0009-2509

卷、期、页：v 313,

发表日期：2025-07-01

影响因子：0.000000

期刊分区（SCI为中科院分区）：二区

收录情况：SCIE（科学引文索引网络版）,EI（工程索引）

发表期刊名称：Chemical Engineering Science

通讯作者：许振,黄文斌,白天瑜,郭际玲,黄萌,杨晗,邵凡,李蓉蓉

第一作者：周亚松,魏强

论文类型：期刊论文

论文概要：许振,黄文斌,白天瑜,郭际玲,黄萌,杨晗,邵凡,李蓉蓉,周亚松,魏强，Enhancing selective hydrogenation of pyridine: The role of nickel doping in Pt/γ-Al2O3 catalysts，Chemical Engineering Science，2025，v 313,

论文题目：Enhancing selective hydrogenation of pyridine: The role of nickel doping in Pt/γ-Al2O3 catalysts