Jin Cheng-Chao, Cai Yu-Xing, Shi Ke-Qiang, Wu Jian-Hao, Yang Bin, Xia Sa-Sa, Hao Ai-Ze, Lin Shaomei, Zhao Wenjie, Li Chun-Yan, Li Lan, Bao Chen-Hao, Chen Zhi, Liu Dai-Ming, Zhang Ling-Xia
College of Materials and Chemistry, China Jiliang University, Hangzhou, 310018, P. R. China.
Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, P. R. China.
Small. 2025 Jun;21(24):e2503004. doi: 10.1002/smll.202503004. Epub 2025 May 5.
The strong hydrophobicity of polytetrafluoroethylene (PTFE) restricts its effective interaction with aqueous media, thereby hindering its contact-electro-catalytic (CEC) performance. Herein, an effective strategy is proposed to enhance CEC efficiency by developing hydrophobic/hydrophilic composites. This approach not only improves hydrophilicity to facilitate solid-liquid contact-electrification (CE) but also leverages solid-solid CE, significantly boosting the CEC activity of PTFE. Notably, the boron nitride (BN)/PTFE composite demonstrates exceptional CEC performance, achieving a hydrogen yield of 15.73 mmol g⁻¹ h⁻¹ in pure water, and a nitrogen reduction rate of 17.25 mmol g⁻¹ h⁻¹ in water/methanol system, far surpassing previously reported piezocatalysts and piezo-photocatalysts. Experimental and theoretical results jointly reveal significant electron transfer between PTFE and water, as well as PTFE and BN. This work not only opens new avenues for developing high-performance CEC materials but also provides a mechanistic framework for understanding interfacial charge-transfer dynamics in CEC systems.
聚四氟乙烯（PTFE）的强疏水性限制了其与水性介质的有效相互作用，从而阻碍了其接触电催化（CEC）性能。在此，提出了一种通过开发疏水/亲水复合材料来提高CEC效率的有效策略。这种方法不仅提高了亲水性以促进固液接触起电（CE），还利用了固固CE，显著提高了PTFE的CEC活性。值得注意的是，氮化硼（BN）/PTFE复合材料表现出优异的CEC性能，在纯水中实现了15.73 mmol g⁻¹ h⁻¹的产氢量，在水/甲醇体系中实现了17.25 mmol g⁻¹ h⁻¹的氮还原率，远远超过了先前报道的压电催化剂和压电光催化剂。实验和理论结果共同揭示了PTFE与水以及PTFE与BN之间存在显著的电子转移。这项工作不仅为开发高性能CEC材料开辟了新途径，还为理解CEC系统中的界面电荷转移动力学提供了一个机理框架。
