Developing a cost‐effective electrocatalyst toward ethanol electrochemical oxidation plays a vital role in large‐scale applications of direct ethanol fuel cells (DEFCs). Herein, a rutile Ti_0.9Ir_0.1O₂‐supported low Pt‐loading catalyst is fabricated using a surfactant‐free one‐pot chemical reduction route at room temperature that not only reduces the amount of the Pt loading but also significantly enhances the CO antipoisoning and electrochemical stability toward ethanol electrochemical oxidation compared with the conventional carbon‐supported Pt electrocatalyst. The rutile Ti_0.9Ir_0.1O₂ nanosupport with rod‐like morphology is first prepared via a one‐pot hydrothermal route, and then 15.5 wt% Pt nanoparticles with small size (≈3 nm) are anchored on it by the surfactant‐free chemical reduction process. For ethanol electrochemical oxidation, the rutile Ti_0.9Ir_0.1O₂‐supported Pt catalyst shows a moderate current density (≈13.74 mA cm⁻²), which is comparable with the 20 wt% Pt/C electrocatalyst, despite its low loading (15.5 wt%). In addition, the rutile Ti_0.9Ir_0.1O₂‐supported low Pt‐loading electrocatalyst demonstrates low onset potential (0.45 V vs normal hydrogen electrode [NHE]), superior CO‐tolerance, and impressive electrochemical stability compared with the carbon‐supported Pt catalyst. These enhancements are ascribable to the inherent durability of the rutile TiO₂ nanostructure and the synergistic effect between Pt and Ti_0.9Ir_0.1O₂ nanosupport.

中文翻译：

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金红石型Ti0.9Ir0.1O2负载的低Pt负载：酸性介质中乙醇电化学氧化的高效电催化剂

在乙醇直接电化学燃料电池（DEFC）的大规模应用中，开发一种具有成本效益的乙醇乙醇氧化电催化剂起着至关重要的作用。本文在室温下使用无表面活性剂一锅化学还原路线制备了金红石Ti _0.9 Ir _0.1 O ₂负载的低Pt负载催化剂，这不仅减少了Pt负载量，而且显着增强了CO抗毒性与传统的碳载Pt电催化剂相比，其对乙醇电化学氧化的电化学稳定性。金红石Ti _0.9 Ir _0.1 O ₂首先通过单锅水热法制备具有棒状形态的纳米载体，然后通过无表面活性剂化学还原过程将15.5 wt％的小尺寸（约3 nm）Pt纳米颗粒固定在其上。对于乙醇电化学氧化，金红石Ti _0.9 Ir _0.1 O ₂负载的Pt催化剂显示出适中的电流密度（≈13.74mA cm ^-2），尽管其低载量（15.5）也可与20 wt％Pt / C电催化剂相比。 wt％）。另外，金红石型Ti _0.9 Ir _0.1 O ₂与碳载Pt催化剂相比，负载低Pt负载的电催化剂显示出低的起始电势（相对于普通氢电极[NHE]为0.45 V），优异的CO耐受性和出色的电化学稳定性。这些增强归因于金红石TiO ₂纳米结构的固有耐久性以及Pt和Ti _0.9 Ir _0.1 O ₂纳米载体之间的协同作用。