Chem. J. Chinese Universities ›› 2022, Vol. 43 ›› Issue (1): 20210657.doi: 10.7503/cjcu20210657

• Article • Previous Articles     Next Articles

Synthesis and Proton Conductivity of Polynuclear Polyoxothiomolybdate Compound

LI Bo, MENG Yuxi, WANG Wenwen, ZANG Hongying()   

  1. Key Laboratory of Polyacid and Mesh Material Chemistry of Ministry of Education,College of Chemistry,Northeast Normal University,Changchun 130024,China
  • Received:2021-09-13 Online:2022-01-10 Published:2021-10-09
  • Contact: ZANG Hongying E-mail:zanghy100@nenu.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(21871042);the Natural Science Foundation of Jilin Province, China(20200201083JC);the Central University Funding Research Fund of China(2412015KJ012)

Abstract:

Proton exchange membrane fuel cell(PEMFC) is widely used for its high energy conversion rate, low pollution, low working temperature and fast start-up speed. The high cost and fuzzy structural characteristics of Nafion membranes hinder the further improvement of proton conduction performance and the accurate understanding of conduction mechanism. The development of crystalline materials with high proton conductivity with clear structures and clear conduction paths is of great significance to the field of fuel cells. Here, a novel polynuclear polyoxothiomolybdate cluster [N(CH342H2[(Mo2S2O28(OH)16(C8O5H42]·22H2O(Mo16) was got via using the organic ligand 5-hydroxyisophthalic acid as a template to induce the occurrence of self-assembly reaction of [Mo2S2O22+. The clear structure and the dense hydrogen bond network in the structure can be used for the study of proton conductivity. The alternating current(AC) impedance test results show that Mo16 has high proton conductivity in a wide temperature range. Its proton conductivity can attain 1.9×10-2 S/cm at 97% relative humidity(RH) and 85 ℃. It shows that the compound has good prospects as a high-efficiency proton conductor.

Key words: Polyoxothiomolybdate(POTM), Self-assembly, Proton conduction

CLC Number: 

TrendMD: