Coupling Pd nanoparticles on fine Ti4O7 with oxygen vacanciesas a high-activity, long-life ORR electrocatalyst
Coupling Pd nanoparticles on fine Ti4O7 with oxygen vacanciesas a high-activity, long-life ORR electrocatalyst
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将 Pd 纳米粒子与氧空位耦合在细 Ti4O7 上作为高活性、长寿命的 ORR 电催化剂
DOI：
10.1007/s11581-021-04058-1
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发表时间：
2021-04
期刊：
影响因子：
2.8
通讯作者：
Zhijun Jia
中科院分区：
文献类型：
--
作者：
Li Niu;Ruidong Xu;Zhijun Jia
在这项工作中，细Ti4O7粉末与许多缺陷制备球磨和超声处理，并用作载体材料负载Pd纳米粒子（Pd NPs）。研究了该催化剂（Pd/Ti4O7（F））对氧还原反应（ORR）的电催化性能。结果表明，Pd/Ti_4O_7（F）催化剂的催化活性优于Pd/Ti_4O_7（C）催化剂、Pd/C催化剂和Pt/C催化剂。X射线光电子能谱（XPS）、电子顺磁共振（EPR）谱和电导率测试结果表明，处理后的Ti4O7载体中丰富的氧空位和无序层所导致的强金属-载体相互作用（SMSI）和高电导率对提高该电催化剂的ORR活性起着至关重要的作用。这为高性能ORR催化剂的设计提供了新的策略。
In this work, fine Ti4O7 powders with many defects were prepared by ball milling and sonication treatments and used as a support material to load Pd nano-particles (Pd NPs). The electrocatalytic performance of this catalyst (Pd/Ti4O7(F)) towards oxygen reduction reaction (ORR) was investigated. It was found that as compared with Pd NPs supported on commercial Ti4O7 (Pd/Ti4O7(C)), Pd/C, and commercial Pt/C, the Pd/Ti4O7(F) catalyst exhibited the best catalytic activity and excellent durability in alkaline solution. According to X-ray photoelectron spectra (XPS), electron paramagnetic resonance (EPR) spectra, and conductivity measurement results, the strong metal-support interactions (SMSIs) and high conductivity induced by abundant oxygen vacancies and disorder layers in the treated Ti4O7 support play a vital role in promoting the ORR activity of this electrocatalyst. These provide a new strategy for the design of high-performance ORR catalysts.
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