Natural gas vehicles (NGVs), as alternatives to gasoline and diesel vehicles, have been rapidly and widely promoted in the past 20 years. The three-way catalyst (TWC) technology is one of the dominant technologies for gaseous emission control of NGVs. However, it is still a great challenge to purify the exhaust gas of NGVs to meet increasingly strict emission limits, particularly for CH₄ and NO_x. This review is focused on the recent research advances in TWCs for NGVs, including the technical fundamentals, classic components (active phases, supports, and promoters), novel preparations of catalysts, resistance to thermal and chemical aging, current challenges and future perspectives. Particular attention is given to Pd-based catalysts as typical commercial TWCs, and potential alternatives which have competitive three-way catalytic performance are also highlighted.

中文翻译：

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天然气汽车三效催化剂的最新进展

在过去的20年中，天然气汽车（NGV）作为汽油和柴油汽车的替代品得到了迅速而广泛的推广。三元催化器（TWC）技术是控制NGV气体排放的主要技术之一。但是，净化NGV的废气以满足日益严格的排放限制仍然是一个巨大的挑战，尤其是对于CH ₄和NO _x。这篇综述的重点是用于NGV的TWC的最新研究进展，包括技术基础，经典成分（活性相，载体和促进剂），催化剂的新颖制备，对热和化学老化的抵抗力，当前的挑战和未来的前景。钯基催化剂作为典型的商用TWC特别受到关注，并且还强调了具有竞争性三元催化性能的潜在替代品。