Manipulating bimetal structure of CuCo at mesoscale via topological transformation of layered double hydroxides

IF 3.5 3区工程技术 Q2 ENGINEERING, CHEMICAL

AIChE Journal Pub Date : 2025-02-25 DOI:10.1002/aic.18784

Qi Ping, Yujing Hu, Jian Zhang, Zhe An, Xin Shu, Hongyan Song, Yanru Zhu, Jing He

引用次数: 0

Abstract

Topological transformation of layered double hydroxides (LDHs) containing bimetal components is a powerful method for producing bimetal catalysts, but suffers from uncontrollable bimetal structures and catalytically active sites due to the indistinct mechanism. This work demonstrates the manipulation of CuCo structure by simply changing the aspect ratio or Cu/Co distribution (one in layer and the other in interlayer) of LDHs, affording (i) exclusive Janus Cu-Co particles or well-alloyed CuCo particles and (ii) CuCo alloy with Janus Cu-Co, monometallic Co, or monometallic Cu coexisting. The mesoscale key factor in the topological transformation is revealed. In the syngas conversion, the selectivity to alcohol reaches 49.3% and 43.2% with C₂₊ alcohol fraction of >94% on well-alloyed CuCo and Janus Cu-Co particles with good affinity of Cu-Co sites. But the presence of monometallic Co or Cu suppresses alcohol selectivity or C₂₊ alcohol fraction by facilitating the production of hydrocarbons or methanol, respectively.

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通过层状双氢氧化物的拓扑变换在中尺度上操纵钴铜双金属结构

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

AIChE Journal 工程技术-工程：化工

CiteScore

7.10

自引率

10.80%

发文量

411

审稿时长

3.6 months

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