Highly reduced (at 500 and 600 °C) 1 wt% Pd/Al₂O₃ samples showed remarkable isomerization selectivity in n-hexane conversion, >80%, in agreement with previous reports. The catalytic behavior of highly reduced Pd/Al₂O₃ becomes typical of platinum, the metal regarded as unique in alkane isomerization. Although not detected in low metal loaded catalysts, Pd-Al species evidenced by formation of Pd-Al alloys in 5 wt% metal loaded catalysts appear essential active sites responsible for n-hexane isomerization. Other possible reasons (contribution from alumina acidity and changes in the structure of metal surface) were analyzed and discarded. A mechanistic rationale for the improvement of n-hexane isomerization is outlined.

高度还原（在500和600°C下）的1 wt％Pd / Al ₂ O ₃样品在正己烷转化率方面显示出显着的异构化选择性，> 80％，与先前的报道一致。高度还原的Pd / Al ₂ O ₃的催化行为成为铂的典型特征，铂是烷烃异构化中独特的金属。尽管未在低金属负载的催化剂中检测到，但在5％的金属负载的催化剂中形成Pd-Al合金所证明的Pd-Al物种似乎是负责正己烷异构化的重要活性位点。分析并丢弃了其他可能的原因（氧化铝酸度的贡献和金属表面结构的变化）。概述了改善正己烷异构化的机理原理。