在实际应用中，瓦斯传感器常因载体催化传感元件表面积碳或孔被堵塞而失去活性，导致仪器灵敏度及使用寿命降低，针对这一问题，重点考察了常用稀土氧化物（如ＣｅＯ２）对瓦斯载体催化传感元件催化剂Ｐｔ／γ－Ａｌ２Ｏ３积碳生成的影响．实验证明，稀土（ＲＥ）掺杂确有抑制积碳生成的作用，同时也可提高催化剂的催化反应活性．研究中对稀土的抗积碳作用机理进行了初步探讨，认为积碳的消除主要是通过稀土对催化剂活性组分表面高度分散及贮氧作用而实现的 In practical applications, gas sensors often lose their activity due to blockage of the surface carbon or pores in the catalytic sensor element, which leads to the decrease of sensitivity and service life of the instrument. In response to this problem, the investigations on the effect of conventional rare earth oxides (such as CeO2) Effect of Catalyst Pt / γ-Al2O3 Catalyst on Catalytic Sense Element Catalyst. Experiments show that rare earth (RE) doping does inhibit the formation of carbon deposition, but also can improve the catalyst catalytic activity. In the study, the anti-carbon deposition mechanism of rare earth was preliminarily discussed. It is believed that the elimination of carbon deposition is mainly achieved by the highly dispersed and oxygen storage effect of the rare earth on the active components of the catalyst