Nitrogen-Doped Carbon Cages Encapsulating CuZn Alloy for Enhanced CO2 Reduction
Nitrogen-Doped Carbon Cages Encapsulating CuZn Alloy for Enhanced CO2 Reduction
复制标题
封装铜锌合金的氮掺杂碳笼可增强二氧化碳减排
DOI：
10.1021/acsami.9b03488
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发表时间：
2019
影响因子：
9.5
通讯作者：
Li Wei
中科院分区：
文献类型：
--
作者：
Hu Xiaosong;Zhao Chaoyue;Hu Xin;Guan Qngxin;Wang Yanlin;Li Wei
CuZn合金作为活性中心对逆水煤气变换反应表现出优异的催化活性，而N原子的引入，尤其是吡啶基N的引入，对CO2分子的吸附和活化有很强的促进作用，可大大提高其催化性能。在此，涉及Cu掺杂的Zn基金属有机框架的合成策略被用于制备在N掺杂的碳壳中包覆的CuZn合金。铜锌合金与吡啶氮的协同催化作用是其优异的CO2转化催化性能的来源。吡啶氮对CO2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。
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 CO2molecules. 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 CO2transformation originates from the synergistic catalytic effect between CuZn alloy and pyridinic N. The strong adsorption and activation capacity for CO2of pyridinic N is ascribed to the lone pair of electrons on the N atom and the high electron density in its vicinity.