Efficient reduction of nitrate to ammonia on an AuPt@ZIF-8 composite film

Abstract

Nitrate reduction represents a sustainable strategy for water denitrification. Herein we design an AuPt@ZIF-8 composite film, via coating a zeolite imidazole framework-8 (ZIF-8) on a porous AuPt alloy, for an efficient electrocatalytic nitrate reduction. It exhibits a superior ammonia yield of (131.5 ± 3.4) μg h⁻¹ mg_cat⁻¹, faradaic efficiency of (95.8 ± 3.0)% and selectivity of 96%, overcoming individual Au, Pt, ZIF-8, and other widely-used Au-based alloys.