标题： WO$_3$纳米粒子装饰的钠铌酸盐微立方体用于电催化过氧化氢生成 显示英文标题

标题： Electrocatalytic Hydrogen Peroxide Generation Using WO$_3$ Nanoparticle-Decorated Sodium Niobate Microcubes

摘要： 本研究探讨了在 Printex L6 上负载不同浓度（按重量计 1%、3%、5% 和 10%）的 NaNbO$_3$微立方体与 WO$_3$纳米粒子的电催化性能，用于 H$_2$O$_2$电生成，旨在未来应用于电化学高级氧化工艺以降解有机污染物。通过氧还原反应（ORR）和旋转环盘电极（RRDE）技术研究了 H$_2$O$_2$电生成。 电化学结果表明，NaNbO$_3$@WO$_3$/C材料的H$_2$O$_2$电化学生成有所改善，优于Printex L6碳材料所达到的效果。 值得注意的是，5% NaNbO$_3$@WO$_3$/C 电催化剂在氧还原反应中表现出更高的环电流，并促进了2.1电子转移，通过2电子机制促进了更高的 H$_2$O$_2$电生成速率。 此外，增强含氧功能基团的能力可以全面调整特性并增加活性位点，从而提高 H$_2$O$_2$的电生成。 这些发现表明，5% NaNbO$_3$@WO$_3$/C 电催化剂有望用于原位生成过氧化氢。 显示英文摘要

摘要： The current work studies the electrocatalytic performance of NaNbO$_3$ microcubes decorated with WO$_3$ nanoparticles on Printex L6 at varying concentrations (1%, 3%, 5%, and 10% by weight) for H$_2$O$_2$ electrogeneration aiming for future use in electrochemical advanced oxidation processes for organic pollutant degradation H$_2$O$_2$ electrogeneration was studied using oxygen reduction reaction (ORR) with the rotating ring-disk electrode (RRDE) technique. Electrochemical results revealed an improvement in H$_2$O$_2$ electrogeneration for the NaNbO$_3$@WO$_3$/C materials compared to that achieved with Printex L6 carbon. Notably, the 5% NaNbO$_3$@WO$_3$/C electrocatalyst exhibited a higher ring current for oxygen reduction reaction and promoted a 2.1-electron transfer, facilitating a higher rate of H$_2$O$_2$ electrogeneration through the 2-electron mechanism. Also, enhancing oxygen-containing functional groups has shown the capability to thoroughly adjust characteristics and enhance active sites, increasing H$_2$O$_2$ electrogeneration. These findings suggest that 5% NaNbO$_3$@WO$_3$/C electrocatalysts hold promise for in situ hydrogen peroxide electrogeneration.