Instituto Universitario de Materiales and Departamento de Química Física. Universidad de Alicante, Apartado 99, E-03080, Alicante, Spain.
Instituto Universitario de Materiales and Departamento de Química Física. Universidad de Alicante, Apartado 99, E-03080, Alicante, Spain; Escuela Profesional de Química, Facultad de Ciencias, Universidad Nacional de Ingeniería, Av. Túpac Amaru, 210, Lima, Peru.
Chemosphere. 2024 Jan;346:140635. doi: 10.1016/j.chemosphere.2023.140635. Epub 2023 Nov 6.
The development of non-expensive and efficient technologies for the elimination of Glyphosate (GLP) in water is of great interest for society today. Here we explore novel electrocatalytic effects to boost the anodic oxidation of GLP on Pt-doped (3-13met%) SnO-Sb electrodes. The study reveals the formation of well disperse Pt nanophases in SnO-Sb that electrocatalyze GLP elimination. Cyclic voltammetry and in-situ spectroelectrochemical FTIR analysis evidence carboxylate-mediated Pt-GLP electrocatalytic interactions to promote oxidation and mineralization of this herbicide. Interestingly, under electrolytic conditions Pt effects are proposed to synergistically cooperate with hydroxyl radicals in GLP oxidation. Furthermore, the formation of by-products has been followed by different techniques, and the studied electrodes are compared to commercial Si/BDD and Ti/Pt anodes and tested for a real GLP commercial product. Results show that, although BDD is the most effective anode, the SnO-Sb electrode with a 13 met% Pt can mineralize GLP with lower energy consumption.
开发廉价且高效的技术来去除水中的草甘膦（GLP）是当今社会非常关注的问题。在这里，我们探索了新的电催化效应，以增强掺杂（3-13%原子）Pt 的 SnO-Sb 电极上 GLP 的阳极氧化。研究表明，Pt 纳米相在 SnO-Sb 中形成了良好的分散，电催化 GLP 的消除。循环伏安法和原位光谱电化学 FTIR 分析证明了羧酸根介导的 Pt-GLP 电催化相互作用促进了这种除草剂的氧化和矿化。有趣的是，在电解条件下，Pt 的作用被提出与 GLP 氧化中的羟基自由基协同合作。此外，还通过不同的技术跟踪了副产物的形成，并将研究的电极与商业 Si/BDD 和 Ti/Pt 阳极进行了比较，并对实际的 GLP 商业产品进行了测试。结果表明，尽管 BDD 是最有效的阳极，但 13%原子 Pt 的 SnO-Sb 电极可以以较低的能耗矿化 GLP。
