PtCo nanoparticles supported on hierarchical SAPO-34 for hydrolysis of ammonia borane and tandem reduction of 4-nitrophenol
PtCo nanoparticles supported on hierarchical SAPO-34 for hydrolysis of ammonia borane and tandem reduction of 4-nitrophenol
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DOI：
10.1016/j.cattod.2022.02.018
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发表时间：
2022-03
期刊：
影响因子：
5.3
通讯作者：
Wenwen Cong;Changyou Xu;Yahang Mu;Qiang Li;Liancheng Bing;Fang Wang;Dezhi Han;Guangjian Wang
中科院分区：
文献类型：
--
作者：
Wenwen Cong;Changyou Xu;Yahang Mu;Qiang Li;Liancheng Bing;Fang Wang;Dezhi Han;Guangjian Wang
采用浸渍法制备了不同Pt/Co比的分级结构SAPO-34负载PtCo双金属催化剂。所制备的PtCo/SAPO-34催化剂对氨硼烷（AB）脱氢反应具有较高的催化活性和稳定性。其中，Pt 1Co 5/SAPO-34催化剂的产氢活性最高，转化频率（TOF）为262 molH 2在303 K下的（mol Pt·min）-1以及在通过与AB的水解脱氢偶联的4-硝基苯酚（4-NP）的催化氢化中的优异催化活性，这是由于PtCo合金中Pt和Co的电子相互作用以及SAPO-34载体上的高金属分散度和布朗斯特酸位暴露所致。此外，所制备的Pt 1 Co 5/SAPO-34催化剂还具有良好的上级循环稳定性，经过5次水解反应后，TOF值为初始值的81%.
In this work, hierarchical SAPO-34 supported PtCo bimetallic catalysts with different Pt/Co ratios were prepared by impregnation method. The obtained PtCo/SAPO-34 catalysts displayed high catalytic activities and durability for the dehydrogenation of ammonia borane (AB). Among them, Pt 1 Co 5/SAPO-34 catalyst delivered the highest hydrogen generation activity with a turnover frequency (TOF) of 262 mol H 2 (mol Pt∙ min)− 1 at 303 K as well as excellent catalytic activity in catalytic hydrogenation of 4-nitrophenol (4-NP) by coupling with hydrolytic dehydrogenation of AB, due to the electron interaction of Pt and Co in PtCo alloy and the high metal dispersion and exposure of Brønsted acidic sites on SAPO-34 support. Moreover, it is noteworthy that the prepared Pt 1 Co 5/SAPO-34 catalyst also exhibited superior recycle stability, with 81% of the initial TOF value after five runs of hydrolysis reaction.