Tribochemical reaction dynamics of molybdenum dithiocarbamate on nascent Iron surface: A hybrid quantum Chemical/Classical molecular dynamics study

Tasuku Onodera, Yusuke Morita, Ai Suzuki, Riadh Sahnoun, Michihisa Koyama, Hideyuki Tsuboi, Nozomu Hatakeyama, Akira Endou, Hiromitsu Takaba, Carlos A. Del Carpio, Ramesh C. Deka, Momoji Kubo, Akira Miyamoto

    Research output: Contribution to journalArticlepeer-review

    8 Citations (Scopus)

    Abstract

    Using a hybrid quantum chemical/classical molecular dynamics method, we have studied the tribochemical reaction dynamics of molybdenum dithiocarbamate (MoDTC), a commonly used friction modifier in automobile engine oils. MoDTC molecule adsorbed on rubbing nascent iron surface was situated. We firstly investigated the dynamic behavior of MoDTC molecule on the rubbing Fe(001) surface. During the friction simulation, the elongation of Mo-O bonds was observed, forming the Mo 2S 4 and thiocarbamic acid molecules. To unveil the detailed mechanism of this bond elongation, the electronic states of the MoDTC molecule and Fe(001) surface were computed, and the catalytic effects of Fe(001) surface to the molecule was found. We also found that extreme friction would influence the complete Mo-O bond dissociation. By using the hybrid quantum chemical/classical molecular dynamics method, we successfully simulated the tribochemical reaction dynamics of MoDTC as a friction modifier and obtained the influences of nascent iron surface and friction on its chemical reaction.

    Original languageEnglish
    Pages (from-to)2495-2502
    Number of pages8
    JournalJournal of nanoscience and nanotechnology
    Volume10
    Issue number4
    DOIs
    Publication statusPublished - Apr 2010

    All Science Journal Classification (ASJC) codes

    • Bioengineering
    • Chemistry(all)
    • Biomedical Engineering
    • Materials Science(all)
    • Condensed Matter Physics

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