Natural gas vehicles (NGVs) have less CO₂ emission and have been attracting more attention. However, catalyst is needed to remove pollutants such as CO, NO_x and unburned methane in NGVs’ exhausts. The development of catalysts with high resistance to chemical poisoning, especially to phosphorus poisoning induced by lubricating oil of NGVs’ engine, is a challenge. Herein, we developed a new strategy to improve the phosphorus resistance of model palladium catalyst using phosphate-modified alumina as support for NGVs. The catalysts were analyzed by N₂-physisorption, X-ray fluorescence spectrum (XRF), X-ray diffraction (XRD), CO-chemisorption, in-situ DRIFTS and X-ray photoelectron spectrum (XPS). The results show that phosphate-alumina support helps the model catalyst maintain its textual properties, otherwise phosphorus species from lubricating oil would deposit on the surface of catalyst and block the catalytically active sites. Moreover, the relative content of active Pd⁰ on phosphate-modified alumina support will not decrease. Therefore, compared with conventional Pd catalyst on alumina, the model Pd catalyst on phosphate-modified alumina can show significantly enhanced phosphorus resistance under operating conditions for NGVs, and can nearly maintain its catalytic performance of removing pollutants upon phosphorus poisoning. Our work would provide a general method for development of catalyst with high performance for NGVs.

天然气汽车（NGV）的CO ₂排放量较少，并已引起更多关注。但是，需要催化剂来去除NGV排气中的污染物，例如CO，NO _x和未燃烧的甲烷。研发对化学中毒具有高抵抗力的催化剂，尤其是对天然气汽车发动机润滑油引起的磷中毒具有挑战性。在本文中，我们开发了一种新的策略，以使用磷酸盐改性的氧化铝作为NGV的载体来提高模型钯催化剂的耐磷性。用N ₂分析催化剂-物理吸附，X射线荧光光谱（XRF），X射线衍射（XRD），CO化学吸附，原位DRIFTS和X射线光电子能谱（XPS）。结果表明，磷酸盐-氧化铝载体有助于模型催化剂保持其文本性质，否则润滑油中的磷物质将沉积在催化剂表面并阻塞催化活性位。而且，活性Pd ⁰的相对含量在磷酸盐改性的氧化铝上的载体不会减少。因此，与传统的氧化铝上的Pd催化剂相比，在磷酸盐改性的氧化铝上的模型Pd催化剂在NGV的操作条件下可以显着提高耐磷性，并且在磷中毒时几乎可以保持其去除污染物的催化性能。我们的工作将提供一种开发用于NGV的高性能催化剂的通用方法。