Hu Xiaosong, Zhao Chaoyue, Hu Xin, Guan Qingxin, Wang Yanlin, Li Wei
ACS Appl Mater Interfaces. 2019 Jul 17;11(28):25100-25107. doi: 10.1021/acsami.9b03488. Epub 2019 Jul 1.
CuZn alloy, regarded as the active sites, shows excellent catalytic activity for the reverse water gas shift reaction, whereas the incorporation of N atoms, especially pyridinic N, can greatly improve its catalytic properties because of the strong promotion capacity for adsorption and activation of CO molecules. Herein, the synthesis strategy involving Cu-doped Zn-based metal-organic frameworks is utilized to prepare CuZn alloy coated in an N-doped carbon shell. The excellent catalytic ability for CO transformation originates from the synergistic catalytic effect between CuZn alloy and pyridinic N. The strong adsorption and activation capacity for CO of pyridinic N is ascribed to the lone pair of electrons on the N atom and the high electron density in its vicinity.
铜锌合金被视为活性位点，对逆水煤气变换反应表现出优异的催化活性，而氮原子（尤其是吡啶氮）的引入，因其对一氧化碳分子的吸附和活化具有强大的促进能力，能极大地改善其催化性能。在此，采用涉及铜掺杂锌基金属有机框架的合成策略，制备包覆在氮掺杂碳壳中的铜锌合金。一氧化碳转化的优异催化能力源于铜锌合金与吡啶氮之间的协同催化效应。吡啶氮对一氧化碳的强吸附和活化能力归因于氮原子上的孤对电子及其附近的高电子密度。
