Synergistic effect of two action sites on a nitrogen-doped carbon catalyst towards acetylene hydrochlorination
Bolin Wang, Yuxue Yue, Xiangxue Pang, Wenrui Zhu, Zhi Chen, Shujuan Shao, Ting Wang, Zhiyan Pan, Xiao‐Nian Li, Jia Zhao
Abstract
Whether the reaction pathway is steady or dynamic over the whole life cycle of a catalyst process can facilitate our understanding of its catalytic behavior. Herein, the dynamic reaction pathways of nitrogen-doped carbon catalysts are investigated in acetylene hydrochlorination. When triggered, the reaction follows the Langmuir-Hinshelwood mechanism with pyrrolic N and pyridinic N as dual active sites. However, pyridinic N is deactivated first, due to the strong adsorption of hydrogen chloride, causing the reaction to further run with pyrrolic N as the single active site and follow the Eley-Rideal mechanism. This work provides a new promising way to study the catalytic behavior of nitrogen-doped carbon catalysts.