Improving the catalytic performance over ultrathin Pd/2D-CoAl-LDH nanosheet via modulating electronic metal-support interaction for CO esterification to dimethyl oxalate

IF 4.7 2区化学 Q2 CHEMISTRY, PHYSICAL

Applied Catalysis A: General Pub Date : 2025-02-12 DOI:10.1016/j.apcata.2025.120167

Kai-Qiang Jing , Wen Ma , Hong-Zi Tan , Jian-Feng Diao , Bin-Wen Liu , Zhong-Ning Xu , Guo-Cong Guo

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引用次数: 0

Abstract

CO esterification to dimethyl oxalate (DMO) represents a vital step in coal to ethylene glycol (EG). Pd-based catalysts are being evidenced to fabricate DMO. However, the effect of support morphology on the interfacial electron transfer has not been revealed sufficiently. Herein, the CoAl-LDH supports with two-dimensional (2D) nanosheet and three-dimensional (3D) flower-like structures were employed as new supports materials for Pd catalysts. The Pd/2D-CoAl-LDH catalyst exhibited a significantly higher CO conversion rate (65.7 %) compared to Pd/3D-CoAl-LDH (48.6 %) in CO to DMO reaction. The XAFS, XPS and CO₂-TPD characterizations indicated that the density of electron over Pd on 2D-CoAl-LDH was higher than that on 3D-CoAl-LDH. Additionally, in situ DR-FTIR analysis of CO revealed that the electron-rich Pd clusters boost electron donation from the Pd to the CO, thus enhancing catalytic performance. This study provides insights into how modulating support morphology can enhance interfacial electron transfer, and further promoting the thermocatalytic efficiency.

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来源期刊

Applied Catalysis A: General 化学-环境科学

CiteScore

9.00

自引率

5.50%

发文量

415

审稿时长

24 days

期刊介绍： Applied Catalysis A: General publishes original papers on all aspects of catalysis of basic and practical interest to chemical scientists in both industrial and academic fields, with an emphasis onnew understanding of catalysts and catalytic reactions, new catalytic materials, new techniques, and new processes, especially those that have potential practical implications. Papers that report results of a thorough study or optimization of systems or processes that are well understood, widely studied, or minor variations of known ones are discouraged. Authors should include statements in a separate section "Justification for Publication" of how the manuscript fits the scope of the journal in the cover letter to the editors. Submissions without such justification will be rejected without review.