@article{Bao2023, 
author = {Yuxiang Bao and Xiuhui Zheng and Jianlin Cao and Shuo Li and Yongxiao Tuo and Xiang Feng and Mingyuan Zhu and Bin Dai and Chaohe Yang and De Chen},
title = {Free radicals induced ultra-rapid synthesis of N-doped carbon sphere catalyst with boosted pyrrolic N active sites for efficient acetylene hydrochlorination},
year = {2023},
journal = {Nano Research},
volume = {16},
number = {5},
pages = {6178-6186},
keywords = {acetylene hydrochlorination, nitrogen-doped carbon, ultrasonic chemistry, free radical, polymerization},
url = {https://www.sciopen.com/article/10.1007/s12274-022-5237-y},
doi = {10.1007/s12274-022-5237-y},
abstract = {Activated carbon-supported HgCl2 catalysts have seriously impeded the development of the polyvinyl chloride (PVC) industry due to the sublimation of Hg species and environmental pollution problems. Herein, the template-free and organic solvent-free strategy was devised to synthesize non-metallic based nitrogen-doped carbon (U-NC) sphere catalyst for acetylene hydrochlorination. This green strategy via ultrasonic chemistry initiates resin crosslinking reactions between aminophenol and formaldehyde resin by free radicals, leading to the ultra-rapid formation of U-NC with remarkably high pyrrolic N content in only 5 min. This U-NC catalyst exhibited an outstanding space-time-yield (1.6 gVCM·gcat−1·h−1), even comparable to the reported metallic catalyst. By combining kinetic analysis, advanced characterizations, and density functional theory, it is found that the amount of pyrrolic N is in linear with C2H2 conversion, and pyrrolic N in U-NC can effectively improve acetylene hydrochlorination performance by mediating HCl adsorption. This work sheds new light on rationally constructing metal-free catalyst for acetylene hydrochlorination.}
}