The activity and stability for oxygen reduction reaction (ORR) of the cathode catalyst of proton exchange membrane fuel cells (PEMFCs) are important issues that should even be considered for practical application. Modifying the catalyst electronic structure and finding durable supports are good approaches for improving these properties. Carbon-free multifunctional oxygen-deficient titanium oxide nanosheets (TiO_2-x NSs) are established as a catalyst support for fuel cell application. The TiO_2-x NSs support shows improved electronic conduction compared to TiO₂ NSs. Pt nanoparticle-loaded TiO_2-x NSs (Pt–TiO_2-x NSs) catalyst prepared in this study shows excellent activity towards the ORR. This is ascribed to a strong metal-support interaction (SMSI) between the Pt nanoparticles (NPs) and the TiO_2-x NSs support. In addition, the Pt–TiO_2-x NSs catalyst shows outstanding durability in repeating square-wave potential cycling tests at 80 °C over 10000 cycles. The fuel cell using the Pt–TiO_2-x NSs catalyst shows high power density (958 mWcm⁻²), which exceeds that of the commercial Pt-loaded carbon catalyst. Also, the projected catalyst showed an excellent stability (more than 100 h) in fuel cell performance. Thus, the proposed TiO_2-x NSs will be a promising carbon-free support to be loaded in the future PEMFCs technology.

质子交换膜燃料电池（PEMFC）阴极催化剂的氧还原反应（ORR）的活性和稳定性是重要的问题，甚至在实际应用中也应予以考虑。改性催化剂的电子结构并找到耐用的载体是改善这些性能的良好方法。建立了无碳多功能缺氧氧化钛纳米片（TiO _2-x NSs）作为燃料电池应用的催化剂载体。在TiO _2-X奈米球支持节目相比的TiO提高电子传导₂奈米。负载铂纳米颗粒的TiO _2-x NSs（Pt–TiO _2-x本研究中制备的NSs）催化剂对ORR表现出优异的活性。这归因于Pt纳米颗粒（NPs）和TiO _2-x NSs载体之间的强金属-载体相互作用（SMSI）。另外，Pt–TiO _2-x NSs催化剂在80°C重复10000次循环中重复方波电势循环测试中显示出出色的耐久性。使用Pt-TiO _2-x NSs催化剂的燃料电池显示出高功率密度（958 mWcm ^-2），超过了载有Pt的商业碳催化剂。而且，投射的催化剂在燃料电池性能中显示出极好的稳定性（超过100小时）。因此，建议的TiO _2-x NSs将是一种有希望的无碳支持，可在未来的PEMFCs技术中加载。