An ultrastable heterostructured oxide catalyst based on high-entropy materials: A new strategy toward catalyst stabilization via synergistic interfacial interaction
An ultrastable heterostructured oxide catalyst based on high-entropy materials: A new strategy toward catalyst stabilization via synergistic interfacial interaction
复制标题
基于高熵材料的超稳定异质结构氧化物催化剂：通过协同界面相互作用稳定催化剂的新策略
DOI：
10.1016/j.apcatb.2020.119155
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发表时间：
2020-11-05
影响因子：
22.1
通讯作者：
Dai, Sheng
中科院分区：
文献类型：
--
作者：
Chen, Hao;Jie, Kecheng;Dai, Sheng
设计高性能催化剂，稳定催化活性位点，防止在900摄氏度以上的温度下烧结失活是很重要的，但也很有挑战性。本文报道了一种获得具有高温稳定性的CO氧化过渡金属氧化物催化剂的新策略。这是通过高熵氧化物（HEO，高温稳定性）和CuCeOx（催化位点）异质结构界面上的协同界面相互作用实现的。CO氧化的催化位点（CuCeOx）是通过熵驱动的机械化学过程将HEO中一定量的Cu溶解到CeO2中来实现的。原位XRD和HAADF-STEM证实了异质结构CuCeOx-HEO的高温稳定性，在高温下仍能保持其CO氧化催化活性。可以预期，这一创新将为工业合成具有高温稳定性的催化剂提供潜力。
Designing high-performance catalysts that can stabilize catalytic active sites against sintering to deactivation at temperature higher than 900 degrees C is significant but challenging. Here we report a new strategy to obtain a transition metal oxide catalyst with high temperature stability for CO oxidation. This is achieved through a synergistic interfacial interaction at the interface of a heterostructure between high-entropy oxides (HEO, high temperature stability) and CuCeOx (catalytic site). The catalytic site (CuCeOx) for CO oxidation is realized by dissolving an amount of Cu species in HEO into CeO2 via an entropy-driven mechanochemical process. In situ XRD and HAADF-STEM have confirmed the high temperature stability of the heterostructure CuCeOx-HEO, which can remain its CO oxidation catalytic activity at elevated temperatures. It should be expected that this innovative will offer the potential to the synthesis of catalysts with high temperature stability in industry.