A non-carbonaceous electrocatalyst free of platinum group metals (PGM-free) was developed based on dual doped titanium suboxide. Specifically, Ti₄O₇Ni_0.15Cu_0.22 (TONC) was prepared by dual doping titanium dioxide with Cu and Ni. Density functional theory (DFT) computations confirms that the unique combination of dopant and Ti suboxide in TONC creates a low band-gap material with high electrical conductivity. The resultant dual-doped Ti suboxide shows significant electrocatalytic activity for the oxygen reduction reaction (ORR) in alkaline media, reducing the performance gap between PGM-free electrocatalysts and Pt/C to ca. 18 mV in RDE testing. Furthermore, TONC displays vastly superior electrochemical durability compared to both Pt/C and other carbon-based PGM-free catalysts. TONC showed lower ORR activity in acidic media compared to Pt/C but TONC had superior durability. Thus TONC has is a both a promising catalyst and catalyst support material for either anion-exchange membrane (AEM) or proton exchange membrane fuel cells.

基于双掺杂低氧化钛开发了一种不含铂族金属（不含 PGM）的非碳质电催化剂。具体地，Ti ₄ O ₇ Ni _0.15 Cu _0.22(TONC) 是通过用 Cu 和 Ni 双掺杂二氧化钛制备的。密度泛函理论 (DFT) 计算证实，TONC 中掺杂剂和低氧化钛的独特组合创造了一种具有高导电性的低带隙材料。所得的双掺杂 Ti 低氧化物对碱性介质中的氧还原反应 (ORR) 显示出显着的电催化活性，将不含 PGM 的电催化剂与 Pt/C 之间的性能差距缩小至约 RDE 测试中为 18 mV。此外，与 Pt/C 和其他基于碳的无 PGM 催化剂相比，TONC 显示出非常优越的电化学耐久性。与 Pt/C 相比，TONC 在酸性介质中显示出较低的 ORR 活性，但 TONC 具有出色的耐久性。