文献类型：期刊文献

英文题名：Modulating electronic structure and exposed surface area of Cu-based catalysts by Pd doping for enhanced CO2 hydrogenation to methanol

作者：Han, Caiyun[1]; Gao, Yunfei[2]; Qin, Langlang[1]; Cao, Yu[1,4]; Wang, Shuang[1,3]; Li, Jinping[3]

机构：[1] College of Environmental Science and Engineering, Taiyuan University of Technology, Shanxi, Jinzhong, 030600, China; [2] Institute of Clean Coal Technology, East China University of Science and Technology, Shanghai, 200237, China; [3] Shanxi Key Laboratory of Gas Energy Efficient and Clean Utilization, Taiyuan University of Technology, Shanxi, Taiyuan, 030024, China; [4] Jiangsu Xinyang New Materials Co., Ltd, Jiangsu, Yangzhou, 225100, China

年份：2025

卷号：354

外文期刊名：Separation and Purification Technology

收录：EI(收录号：20242916726555)

语种：英文

外文关键词：Carbon dioxide - Catalysts - Copper - Crystallite size - Electronic structure - Hydrogenation - II-VI semiconductors - Palladium - Syngas production - Zinc oxide

摘要：The development of efficient catalysts for CO2 hydrogenation to methanol holds great significance in addressing environmental concerns and sustainable energy production. In this study, a series of Cu/ZnO (CZ) catalysts doped with Pd, Pt, and Ru were investigated to unravel the role of Cu electronic structure in this process. Surprisingly, it was found that the introduction of Pd and Pt led to the formation of an electron-rich Cu site due to partial electron transfer, which greatly enhanced CO2 activation. Furthermore, the electronic effects of Pd and Cu allowed the 2Pd/CZ catalyst having the smallest Cu crystallite sizes and highest exposed Cu surface area. This offered the unique advantage of constructing the rich Cu-ZnO interface; thus, significantly enhanced the methanol synthesis activity. Utilizing this phenomenon, a series of Pd/CZ catalysts were synthesized by adjusting the amount of Pd incorporation, all of which exhibited excellent methanol synthesis performance. Notably, the 2Pd/CZ catalyst demonstrated the highest CH3OH STY (space–time yield) of 0.52 g·g?1·h?1. This work provides valuable insights into the design of highly efficient catalytic materials for CO2 hydrogenation to methanol. ? 2024 Elsevier B.V.