五重孪晶铜纳米线@聚吡咯制备及其电催化硝酸盐还原制氨

Reasonable design of nanostructured catalysts with high activity, selectivity, stability, and low cost is a significant challenge for achieving efficient electrocatalytic reduction of nitrate to ammonia. In this study, we successfully prepared a five-fold twinned copper nanowires@polypyrrole (T-CuNW@ppy) by hydrothermal coupled in-situ reduction method, which achieved ammonia production activity under low bias voltage, improved Faradaic efficiency, and significantly improved corrosion resistance. At a bias of -0.4 V (vs RHE), the T-CuNW-10 exhibited an impressive ammonia synthesis activity of 13.83 mg·mg^-1·h^-1; while at a bias of -0.7 V (vs RHE) it reached 23.24 mg·mg^-1·h^-1. Furthermore, the Faradaic efficiency of NO^-₂ and NH₃ is a close to 100%. Additionally, the corrosion current is reduced to 3.14 mA·cm^-2. Overall, our findings demonstrate that this catalyst not only exhibits high efficiency and stability in nitrate reduction performance but also provides valuable insights for the development and design of industrial application-oriented catalysts.