@article{Yuan2022, 
author = {Zijian Yuan and Lu Liu and Wei Ru and Daojin Zhou and Yun Kuang and Junting Feng and Bin Liu and Xiaoming Sun},
title = {3D printed hierarchical spinel monolithic catalysts for highly efficient semi-hydrogenation of acetylene},
year = {2022},
journal = {Nano Research},
volume = {15},
number = {7},
pages = {6010-6018},
keywords = {layered double hydroxide, spinel, direct ink writing, 3D-printing catalyst, semi-hydrogenation of acetylene},
url = {https://www.sciopen.com/article/10.1007/s12274-022-4291-9},
doi = {10.1007/s12274-022-4291-9},
abstract = {Porous monolithic catalysts with high specific surface areas, which can not only facilitate heat/mass transfer, but also help to expose active sites, are highly desired in strongly exothermic or endothermic gas–solid phase reactions. In this work, hierarchical spinel monolithic catalysts with a porous woodpile architecture were fabricated via extrusion-based three-dimensional (3D) printing (direct ink writing, DIW in brief) of aluminate-intercalated layered double hydroxide (AI-LDH) followed by low temperature calcination. The intercalation of aluminate in LDH is found crucial to tailor the M2+/Al3+ ratio, integrate LDH nanosheets into monolithic catalyst, and enable the conversion of LDH to spinel at the temperature as low as 500 °C with high specific surface areas (> 350 m2/g). The rapid mass/heat transfer resulted from the versatile 3D network at macroscale and the highly dispersed and fully exposed active sites benefited from the porous structure at microscale endow the 3D-printed Pd loaded spinel MgAl-mixed metal oxide (3D-AI-Pd/MMO) catalyst with excellent catalytic performance in semi-hydrogenation of acetylene, achieving 100% conversion at 60 °C with more than 84% ethylene selectivity.}
}