CIESC Journal ›› 2016, Vol. 67 ›› Issue (4): 1340-1347.doi: 10.11949/j.issn.0438-1157.20150424

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Reaction mechanism of electrochemical reduction of acetylene to ethylene

SONG Xiuli1,2, JIA Ruilong1, XIE Xuejia1, LIANG Zhenhai1, ZHU Zhenping3   

  1. 1. College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China;
    2. Department of Chemistry, Taiyuan Normal University, Taiyuan 030031, Shanxi, China;
    3. State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, Shanxi, China
  • Received:2015-04-07 Revised:2015-11-24 Online:2016-04-05 Published:2015-11-26
  • Supported by:

    supported by the National Natural Science Foundation of China and Shenhua Group Corp.(U1261103) and the Open Fund of State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences (J12-13-913).


Electrochemical synthesis of ethylene from acetylene was put forward and the synthesized ethylene was characterized by gas chromatography (GC). First-principle calculations were carried out to examine the adsorption of acetylene over the Pd (111) surface. The electrochemical reduction behavior of acetylene has been investigated on a Pd electrode by cyclic voltammetry (CV) and stable polarization curves in sulfuric acid. The formation mechanism of ethylene in the sulfuric acid was proposed and the transfer coefficients of the reaction were calculated. The results showed that the acetylene molecule tended to be adsorbed through the threefold parallel-bridge configuration that was computed to be the most stable because of its lowest adsorption energy. The rate-determining step in the electrolysis process has been obtained. The rate of this step obtained from the assumed process agreed well with the experiment results.

Key words: acetylene, ethylene, absorption, reduction, electrochemistry mechanism, first-principles, rate-determining step

CLC Number: 

  • O643

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