Understanding the details of how Pt-O/Pt active sites are boosted is essential for many catalytic reactions. Herein, different anatase/rutile (A/R) phase ratios of TiO₂ nanoparticles (NPs) prepared by controlling calcination temperature (T), and irreversibly adsorbed Bi(III) are employed to dually improve the Pt-O/Pt active sites and their electrocatalytic activities. It is found that a T-dependent concave improvement trend is obtained on Pt/TiO₂-T for the Pt-O/Pt active sites and electrocatalytic methanol oxidation rate. In the simultaneous presence of TiO₂-T and BiO_x, the electron-rich R(1 1 0) facet of TiO₂-950 can promote the formation of bimetallic Bi-Pt sites, and the oxygen-acceptable Bi(III) is favorite for the electrochemical assembly of {Bi-O_x-Pt} active sites on the R(1 1 0) facet, further achieving a remarkable increase of 19.7-fold and 4.5-fold for the Pt-O/Pt active sites and electrocatalytic activity towards methanol oxidation compared with the case of bare Pt electrodes, respectively. The relationship between the Pt-O/Pt active sites and electrocatalytic properties is demonstrated, and the complete oxidation mechanism of methanol is proposed on BiO_x-[Pt-TiO₂-950] with reliable long-term durability. This study shows a new dually tuning strategy to maximize the utilization efficiency and anti-deactivated ability of Pt-based catalysts by TiO₂-T and BiO_x.

了解 Pt-O/Pt 活性位点如何增强的细节对于许多催化反应至关重要。在此，通过控制煅烧温度（T ）制备的TiO ₂纳米颗粒（NPs ）的不同锐钛矿/金红石（A/R）相比和不可逆吸附的Bi（III）被用于双重改善Pt-O/Pt活性位点和它们的电催化活性。结果发现， Pt/TiO ₂ - T的Pt-O/Pt活性位点和电催化甲醇氧化速率均呈现出依赖于T的凹改善趋势。_{在TiO 2} - T和BiO _x同时存在的情况下，TiO ₂ -950的富电子R(1 1 0)面可以促进双金属Bi-Pt位点的形成，氧可接受的Bi(III)为最适合在 R(1 1 0) 面上电化学组装 {Bi-O _x -Pt}活性位点，进一步实现 Pt-O/Pt 活性位点和电催化性能分别显着增加 19.7 倍和 4.5 倍分别与裸 Pt 电极的情况相比，对甲醇氧化的活性。论证了Pt-O/Pt活性位点与电催化性能之间的关系，并提出了在BiO _x -[Pt-TiO ₂ -950]上甲醇的完全氧化机理，具有可靠的长期耐久性。_{本研究提出了一种新的双重调节策略，可最大限度地提高TiO 2} - T和BiO _x铂基催化剂的利用率和抗失活能力。