Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, 1219 Zhongguan West Road, Ningbo 315201, People's Republic of China.
School of Chemistry and Chemical Engineering, University of Jinan, 336 West Road of Nan Xinzhuang, Jinan 250022, People's Republic of China.
Environ Sci Technol. 2023 Dec 12;57(49):20905-20914. doi: 10.1021/acs.est.3c05354. Epub 2023 Nov 27.
NO storage-reduction (NSR), a promising approach for removing NO pollutants from diesel vehicles, remains elusive to cope with the increasingly lower exhaust temperatures (especially below 250 °C). Here, we develop a conceptual electrified NSR strategy, where electricity with a low input power (0.5-4 W) is applied to conductive Pt and K co-supported antimony-doped tin oxides (Pt-K/ATO), with CH as a reductant. The ignition temperature for 10% NO conversion is nearly 100 °C lower than that of the traditional thermal counterpart. Furthermore, reducing the power in the fuel-lean period relative to that in the fuel-rich period increases the maximum energy efficiency by 23%. Electrically driven release of lattice oxygen is revealed to play vital roles in multiple steps in NSR, including NO adsorption, desorption, and reduction, for improved NSR activity. This work provides an electrification strategy for developing high-activity NSR catalysis utilizing electricity onboard hybrid vehicles.
无存储还原（NSR）是一种很有前途的从柴油车辆中去除 NO 污染物的方法，但仍难以应对日益降低的废气温度（尤其是低于 250°C）。在这里，我们开发了一种概念性的电驱动 NSR 策略，其中应用低输入功率（0.5-4 W）的电力来对导电 Pt 和 K 共负载的掺锑氧化锡（Pt-K/ATO）进行作用，使用 CH 作为还原剂。10%NO 转化率的点火温度比传统的热对应物低近 100°C。此外，相对于富燃料期，在贫燃料期降低功率会使最大能量效率提高 23%。电驱动晶格氧的释放被揭示在 NSR 的多个步骤中起着至关重要的作用，包括 NO 的吸附、解吸和还原，从而提高了 NSR 的活性。这项工作为利用混合动力汽车上的电力开发具有高活性的 NSR 催化提供了一种电气化策略。
