The performance of a series of Pt/La(x)/HAP catalysts was investigated in the WGS reaction. It was found that the addition of La into the Pt/HAP catalyst enhances its OSC, hinders the incorporation of Pt species into the HAP framework, promotes its reducibility, decreases the Pt particle size and markedly improves its WGS activity. Moreover, the shut-down/start-up experiments demonstrate the high resistance of the investigated samples and the possibility of their use in mobile device applications.

Kinetic data show that the reaction orders measured on Pt/La(4)/HAP agree with those corresponding to 1%Pt/Al₂O₃ catalyst. By contrast, the general tendency found on the rest of our samples, including the unpromoted one, resembles that shown by a Pt/CeO₂ catalyst. Due to the presence of OH- vacant sites on our Ca-deficient HAP, it seems that it plays a role similar to that exhibited by the CeO₂ reducible support.

在WGS反应中研究了一系列Pt / La（x）/ HAP催化剂的性能。已经发现，向Pt / HAP催化剂中添加La增强了其OSC，阻碍了Pt物质掺入HAP骨架中，促进了其还原性，减小了Pt粒径，并显着提高了其WGS活性。此外，关机/启动实验证明了所研究样品的高耐受性以及它们在移动设备应用中使用的可能性。

动力学数据表明，在Pt / La（4）/ HAP上测得的反应顺序与对应于1％Pt / Al ₂ O ₃催化剂的反应顺序一致。相比之下，在我们其余样品（包括未助催化的样品）上发现的总体趋势类似于Pt / CeO ₂催化剂所显示的趋势。由于我们的缺钙HAP上存在OH-空位，因此它的作用与CeO ₂可还原支持物所显示的相似。