Glyphosate (Gly), as a widely used broad-spectrum herbicide, may lead to soil and water pollution due to its persistence in the environment. Herein, the co-reduction method was employed to anchor bimetallic PdCu onto the Ni and nitrogen-doped 3D Flower-like Carbon Materials (Ni@NC), creating a composite material (PdCu/Ni@NC) with high specific surface area and good catalytic performance. This composite was used to modify screen-printed electrodes (SPE) to develop a portable and efficient Gly detection platform. In the presence of Cl⁻, the copper active sites convert to CuCl, achieving signal amplification. Upon the addition of Gly, a competitive reaction between Cu and Gly converts CuCl into a Cu-Gly complex, resulting in a sharp decrease in the electrochemical signal. This signal drop is used to detect Gly. The bimetallic PdCu nanoparticles (NPs) endowed the sensing platform with better stability and electrochemical performance due to their synergistic effect, and their stability was simply verified by Density functional theory (DFT). The sensor demonstrates a linear detection range spanning from 1 × 10⁻¹ ³ to 1 × 10⁻⁵ M, with a limit of detection (LOD) of 3.72 × 10⁻¹ ⁴ M. The sensor demonstrated a recovery rate of 95.9 % to 104.5 % in actual samples such as water and soil, indicating its potential for practical application.

中文翻译：

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双金属 PdCu 锚定在 3D 花状碳材料上，用于便携式和高效检测草甘膦


草甘膦 （Gly） 作为一种广泛使用的广谱除草剂，由于其在环境中的持久性，可能导致土壤和水污染。本文采用共还原方法将双金属 PdCu 锚定到 Ni 和氮掺杂的 3D 花状碳材料 （Ni@NC） 上，从而产生具有高比表面积和良好催化性能的复合材料 （PdCu/Ni@NC）。该复合材料用于修饰丝网印刷电极 （SPE），以开发一种便携式、高效的 Gly 检测平台。在 Cl⁻ 存在下，铜活性位点转化为 CuCl，实现信号放大。添加 Gly 后，Cu 和 Gly 之间的竞争反应将 CuCl 转化为 Cu-Gly 络合物，导致电化学信号急剧下降。此信号丢弃用于检测 Gly。双金属 PdCu 纳米颗粒 （NPs） 由于其协同效应而赋予了传感平台更好的稳定性和电化学性能，其稳定性通过密度泛函理论 （DFT） 进行了简单验证。该传感器的线性检测范围从 1 × 10⁻¹ ³ 到 1 × 10⁻⁵ m，检测限 （LOD） 为 3.72 × 10⁻¹ ⁴ m。该传感器在水和土壤等实际样品中的回收率为 95.9 % 至 104.5 %，显示出其实际应用的潜力。