Reduction of chlorinated hydrocarbons using nano zero-valent iron supported with an electric field. Characterization of electrochemical processes and thermodynamic stability

Enhancement of the electrochemical oxygen reduction performance by surface oxygen vacancies on hematite nanosheets

“…23 The anodic peak at 0.2–0.3 V vs. RHE is attributed to the oxidation of Fe 2+ to Fe 3+ by querying the Pourbaix diagram for iron. 47,48…”

“…23 The anodic peak at 0.2-0.3 V vs. RHE is attributed to the oxidation of Fe 2+ to Fe 3+ by querying the Pourbaix diagram for iron. 47,48 To evaluate the intrinsic ORR activity, we subtracted the polarization signal in an N 2 -saturated electrolyte from that of an O 2 -saturated electrolyte (Fig. 4b).…”

Environmental remediation approaches by nanoscale zero valent iron (nZVI) based on its reductivity: a review

“…Pavelková et al conducted dechlorination tests of chlorinated hydrocarbons (TCE, PCE, and DCE) by nZVI with the electric eld and indicated that the dechlorination predominantly occurred around the anode despite that it is expected near the cathode. 130 No dechlorination products was detected in the cathode owing to the presence of Fe oxides, such as Fe 3+ or Fe(OH) 4…”

“…With the additional electrons provided by the electric current, the reduction of contaminants by nZVI can be enhanced. 130 Qi et al proposed an efficient technique to enhance the removal of Se(IV) from wastewater via the electrolysis-assisted reduction by nZVI (E-nZVI), which achieved an enhanced removal efficiency (15.83 mg Se(IV)/g nZVI) exceeded nZVI system by ∼135%. 131 Separate anode-cathode experiments and surfacesensitive quantitative characterization demonstrated that improved performance is not only attributed to the synergistic effects of nZVI and cathodic reduction on the precipitation of Se, but also benet from the nZVI corrosion aggravated by electrochemical oxidization in the anode chamber (Fig.…”

“…With the additional electrons provided by the electric current, the reduction of contaminants by nZVI can be enhanced. 130 …”