In this study, an efficient WO_3-x nanoplates photoanode was generated based on bidentate hydrogen bonds and in subsequent thermal reduction of ethylene glycol (EG). An appropriate number of controllable oxygen vacancies (O_v) was generated in-situ on the surface of the WO₃ nanoplates without deep defects by bidentate hydrogen bonds. Density functional theory (DFT) calculations indicate that the distance between two alcoholic hydrogens (5.124 Å) in EG matches that of the diagonal oxygens (5.483 Å) in the WO₃ (002) surface, which allows EG to combine through the most stable bidentate hydrogen bonds with O-H intervals of approximately 2.5 Å. Diagonal oxygens are captured directly from the surface, leaving O_v owing to the special hydrogen-bond structure and moderate reducibility of EG under appropriate thermal conditions. The photocurrent density of the WO_3-x nanoplates improve considerably to 2.07 from the 0.91 mA cm^-2 of pristine WO₃ with the introduction of O_v, which demonstrates the superior surface reaction kinetics from the reduced holes-to-water resistance and increase in surface injection efficiency. DFT calculations of the oxygen evolution reaction reveal that surface O_v could substantially decrease the reaction energy barrier for a lower overpotential of 0.494 V compared to that of WO₃ (1.037 V), which is consistent with the reduction in the Tafel slope from 412 to 243 mV dec^-1. Therefore, this study provides an innovative method to obtain an efficient WO₃ photoanode based on the treatment of EG.

在这项研究中，基于双齿氢键和随后的乙二醇（EG）热还原反应生成了高效的WO _3-x纳米板光阳极。在WO ₃纳米板的表面上原位产生了适当数量的可控氧空位（O _v），没有通过双齿氢键产生的深缺陷。密度泛函理论（DFT）计算表明，EG中两个醇氢（5.124Å）之间的距离与WO ₃（002）表面中对角氧（5.483Å）的距离匹配，这使EG可以通过最稳定的双齿结合氢键的OH间隔约为2.5Å。对角氧直接从表面捕获，留下O _v由于在适当的热条件下EG具有特殊的氢键结构和适度的还原性。通过引入O _v，WO _3-x纳米板的光电流密度从原始WO ₃的0.91 mA cm ^-2显着提高至2.07 ，这表明由于降低的抗空穴性和抗水性，提高了其优异的表面反应动力学。表面注入效率。氧气逸出反应的DFT计算表明，与WO ₃（1.037 V）相比，表面O _v可以显着降低反应能垒，而其过电势较低，为0.494 V ，这与Tafel斜率从412降低到下降243 mV^-1。因此，这项研究提供了一种创新的方法，以基于EG的治疗方法来获得有效的WO ₃光电阳极。