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首页> 外文期刊>RSC Advances >Improved H2 utilization by Pd doping in cobalt catalysts for reductive amination of polypropylene glycol
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Improved H2 utilization by Pd doping in cobalt catalysts for reductive amination of polypropylene glycol

机译：通过Pd掺杂在钴催化剂中改善了H2利用，用于重组聚丙烯乙二醇的胺化

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摘要

Cobalt based catalysts having enhanced H _(2) dissociation and desorption were synthesized by inserting a trace amount of palladium. These catalysts were used for the reductive amination of polypropylene glycol (PPG) to polyetheramine (PEA). The catalytic activity toward PEA was significantly increased by incorporating an extremely low content of palladium (around 0.01 wt%) into cobalt based catalysts. The Pd inserted cobalt catalysts promoted reduction of cobalt oxide to cobalt metal and inhibited formation of cobalt nitride in the reductive amination. The Pd inserted cobalt catalysts not only enhanced hydrogen dissociation but also accelerated hydrogen desorption by increasing the electron density of cobalt through interaction between cobalt and palladium. These play a critical role in reducing cobalt oxide or cobalt nitride to cobalt metal as an active site for the reductive amination. Thus, the Pd inserted cobalt catalysts provide improved catalytic performance toward PEA production by maintaining the cobalt metal state.
机译：通过插入痕量的钯合成具有增强的H _（2）解离和解解的钴基催化剂。这些催化剂用于将聚丙二醇（PPG）的还原胺化至聚醚胺（PEA）。通过将极低的钯（约0.01重量％）掺入基于钴基催化剂，可以显着增加豌豆的催化活性。 Pd插入的钴催化剂促进了氧化钴的降低，并抑制在还原胺中的氮化钴的形成。 Pd插入钴催化剂不仅增强了氢解离，而且还通过增加钴和钯之间的相互作用来增加钴的电子密度加速氢解吸。这些在将氧化钴或氮化物中作为钴金属作为活性位点来发挥关键作用，以进行还原胺化。因此，通过维持钴金属状态，Pd插入的钴催化剂为豌豆产生提供了改进的催化性能。

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