Compared to the Pd NP /α-Al 2 O 3 catalyst, the Pd 1 /(ZnMn 2 O 4 @MnO 2 ) (Pd 1 /ZMO) catalyst exhibits significantly reduced noble metal loading from 1 wt% to 0.25 wt%, while increasing the mass activity by 4 times for the CO esterification to methyl formate.

Abstract The hadal trenches, the deepest regions of the ocean, serve as the final sinks for marine particles and "tunnels" for material exchange between the ocean and Earth's interior. Despite their extreme conditions, the trench sediments contain high content of organic carbon and active microbial carbon turnover, are hotspots for deep-sea organic carbon degradation and unique microbial processes. However, little is known about the organic carbon components and microbial metabolisms driving their degradation in t…

Abstract Dimethyl carbonate and dimethyl oxalate are competitive products of the carbonylation reaction of methyl nitrite (MN) under Pd‐based catalysts. The chemo‐selectivity is influenced not just by the thermodynamic constraints of reaction conditions but also by the electronic structures of catalysts. Lewis acid sites are extensively employed to modulate the electronic structures of Pd active sites for kinetic carbonate production, but their precise role remains unclear. Herein, we employed a combination of rea…

CO esterification to dimethyl oxalate (DMO) has important industrial application value. However, the influence of support on catalytic performance has not been investigated sufficiently. In this work, MgAl-LDO supports (MgAl-LDO-400 and MgAl-LDO-600) were prepared at different calcination temperatures. The corresponding Pd-based catalysts was synthesized by impregnation method. The Pd/MgAl-LDO-400 catalyst exhibited higher CO conversion (39%) compared with the Pd/MgAl-LDO-600 (16%). It was found that Pd/MgAl-LDO-4…

Zn 2+ 通过电子转移提升 CO 酯化反应 Pd 基催化剂性能 刘洵 ab 江辉波 a 荆凯强 a 徐忠宁 * a 郭国聪 * a ( a 中国科学院福建物质结构研究所 结构化学国家重点实验室 福建福州 350002; b 中国科学院大学 北京 100049) 摘要 煤制乙二醇是现代煤化工中的一个重要技术路线, 其中 CO 酯化反应合成草酸二甲酯(DMO)是关键步骤之 一. 负载型 Pd 基催化剂可有效催化该反应, 但关于载体效应的研究相对较少.本研究使用二维层状材料 CoAl-LDH 作 为载体, 合成的 Pd/CoAl-LDH 催化剂在 CO 酯化制 DMO 反应中显示出 51.5%的 CO 转化率.进一步在载体中引入 Zn 2+ 合成 Pd/ZnCoAl-LDH 催化剂, 其 CO 转化率提高至 61.