Abstract
Electrocatalytic convert nitrate wastewater and discarded polyethylene terephthalate (PET) into high-value chemicals is an effective approach to addressing environmental pollution while generating economic benefits. To achieve this vision, herein, PdCu alloy metallene grown on Ni foam (PdCuene/NF) was synthesized via a one-step solvothermal method and directly used for anodic ethylene glycol oxidation reaction (EGOR), while an additional oxidation-electroreduction treatment was conducted to further convert it into reconstructed PdCuene/NF (r-PdCuene/NF) for cathodic nitrate reduction reaction (NO3RR). With the synergism of metallene array structure and alloying effect, the cathodic r-PdCuene/NF showed an enhanced nitrate-to-ammonia activity with a maximum Faradaic efficiency (FE) of 91.59 ± 2.79 %, while the anodic PdCuene/NF could effectively convert EG into glycolic acid (maximum FE: 92.12 % ± 0.26 %). The coupling of nitrate reduction with PET-derived EG oxidation based on these two materials allowed the simultaneous production of ammonia and glycolic acid with high FEs (>94 %).
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