Pyridinic nitrogen enables dechlorination of trichloroethylene to acetylene by green rust: Performance, mechanism and applications

Single-Atom Iron Can Steer Atomic Hydrogen toward Selective Reductive Dechlorination: Implications for Remediation of Chlorinated Solvents-Impacted Groundwater

“…The important role of H* in TCE dechlorination by Fe 0 @Fe-N 4 -C was further corroborated with the slower dechlorination rate in D 2 O than in H 2 O (with a KIE value of 1.6) (Figures 4g and S26), as the heavier D* is a kinetically less effective reductant. 57−59 Note that the addition of excess SCN − did not completely inhibit dechlorination, indicating that additional catalytic sites (e.g., pyridinic nitrogen 60 and/or Fe-C 61,62 sites) might have contributed to TCE reduction. Additionally, the presence of graphitic carbon in Fe 0 @Fe-N 4 -C increased the hydrophobicity and enhanced electron transfer efficiency of the material (Figure S27 and S28), two previously proposed mechanisms responsible for improved TCE dechlorination by S-NZVI 13−21 (the data for S-NZVI are also included in Figure S27 and S28).…”