阐明氧缺陷丰富的TiOxNy外在Ti基电催化剂中的作用,以增强氧降解反应
Xiaohang Zhu1, Zongtao Zhao1, Jialiu Tang1
1State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China.
Fundamental research
|June 18, 2025
概括
配 (Ti) 基电催化剂与富含氧的氧化 (TiOxNy) 外显著提高了氧降解反应 (ORR) 的性能. 这种增强源于与TiN核心的协同效应,改善了纳米粒子的分布.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 催化剂是一种催化剂.
背景情况:
- 基于 (Ti) 的材料在氧降解反应 (ORR) 催化方面进行了广泛的研究.
- 在N-化Ti基电催化剂中活性位点的精确功能仍然不完全理解.
研究的目的:
- 阐明氧缺陷丰富的氧化 (TiOxNy) 物种在提高ORR性能中的作用.
- 为了研究TiOxNy外和TiN核之间的协同效应,在Ti基电催化剂中.
主要方法:
- 使用TiO2和TiN前体通过热化和氧化合成TiOxNy物种.
- 超细 (Pt) 纳米粒子的原子层沉积.
- 在酸性介质中ORR性能和稳定性的电化学表征.
主要成果:
- 在基于Ti的催化剂上成功形成了大量氧缺陷的TiOxNy物种.
- 这些缺陷促进了均的Pt纳米粒子分布,增强了ORR活动.
- 支持TiN的Pt催化剂表现出卓越的ORR性能 (启动电位:0.88V,半波电位:0.76V) 和稳定性.
- 质量活动是商业Pt/C的 1.9 倍,达到 112 A gPt-1 .
结论:
- 富含氧缺陷的TiOxNy外在提升基于Ti的电催化剂的ORR性能方面发挥着至关重要的作用.
- TiOxNy外和TiN核心之间的协同相互作用是改善催化活性和稳定性的关键.
- 这项研究提供了通过控制氧缺陷来设计ORR高效的基于Ti的电催化剂的见解.
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