Zhang Jinyang, Wang Xinru, Zhao Xinyue, Chen Honglei, Jia Peng
Key Laboratory of Pulp and Paper Science & Technology of Ministry of Education/Shandong Province, State Key Laboratory of Biobased Material and Green Papermaking, Faculty of Light Industry, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China.
Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Renewable Energy Conversion and Storage Center (RECAST), College of Chemistry, Nankai University, Tianjin 300071, China.
Polymers (Basel). 2024 Dec 29;17(1):59. doi: 10.3390/polym17010059.
The supported RuO catalysts are known for their synergistic and interfacial effects, which significantly enhance both catalytic activity and stability. However, polymer-supported RuO catalysts have received limited attention due to challenges associated with poor conductivity. In this study, we successfully synthesized the RuO-polytetrafluoroethylene (PTFE) catalyst via a facile annealing process. The optimized nucleation and growth strategies enable the formation of RuO particles (~13.4 nm) encapsulating PTFE, establishing a conductive network that effectively addresses the conductivity issue. Additionally, PTFE induces the generation of oxygen vacancies and the formation of stable RuO/PTFE interfaces, which further enhance the acidic OER activity and the stability of RuO. As a result, the RuO-PTFE catalyst exhibits a low overpotential of 219 mV at 10 mA cm⁻ in the three-electrode system, and the voltage of the RuO-PTFE||commercial Pt/C system can keep 1.50 V for 800 h at 10 mA cm. This work underscores the versatility of PTFE as a substrate for fine-tuning the catalyst morphology, the crystal defect, and the stable interface outerwear. This work not only broadens the application scope of PTFE in catalyst synthesis but also provides a novel approach to the design of high-performance metallic oxide catalysts with tailored oxygen vacancy concentration and stable polymer outerwear.
负载型RuO催化剂因其协同效应和界面效应而闻名，这些效应显著提高了催化活性和稳定性。然而，由于与导电性差相关的挑战，聚合物负载的RuO催化剂受到的关注有限。在本研究中，我们通过简便的退火工艺成功合成了RuO-聚四氟乙烯（PTFE）催化剂。优化的成核和生长策略能够形成包裹PTFE的RuO颗粒（约13.4 nm），建立起一个有效地解决了导电性问题的导电网络。此外，PTFE诱导氧空位的产生以及稳定的RuO/PTFE界面的形成，这进一步提高了酸性析氧反应（OER）活性和RuO的稳定性。结果，RuO-PTFE催化剂在三电极体系中，在10 mA cm⁻²时表现出219 mV的低过电位，并且RuO-PTFE||商业Pt/C体系的电压在10 mA cm⁻²时可以在800 h内保持1.50 V。这项工作强调了PTFE作为一种用于微调催化剂形态、晶体缺陷和稳定界面外层的基底的多功能性。这项工作不仅拓宽了PTFE在催化剂合成中的应用范围，还为设计具有定制氧空位浓度和稳定聚合物外层的高性能金属氧化物催化剂提供了一种新方法。
