1 Industrial Catalysis Institute of Zhejiang University of Technology, State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Hangzhou, 310014, P. R. China. ffeng@zjut.edu.cn xnli@zjut.edu.cn.
Pd-[Bmim][Cl] phase was immobilized onto Al2O3 to neutralize the excessive hydrogen in the gas phase to prevent the over-hydrogenation of acetylene, thereby achieving a high selectivity for ethylene.