Dong Xuanli, Wang Ziming, Hou Yu, Feng Yawei, Berbille Andy, Li Huifan, Wang Zhong Lin, Tang Wei
Center for High-Entropy Energy and Systems, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 100140, P. R. China.
School of Nanoscience and Engineering, University of Chinese Academy of Sciences, Beijing 100049, China.
J Am Chem Soc. 2024 Oct 1. doi: 10.1021/jacs.4c07446.
Interfacial contact electrification can catalyze redox reactions through a process called contact-electro-catalysis (CEC). The two main reaction paths for producing reactive oxygen species via CEC are the water oxidation reaction (WOR) and the oxygen reduction reaction (ORR). Herein, we designed a polymer/metal Janus composite catalyst that regulated the reaction rates of the WOR and ORR based on the catalyst composition. The ORR was preferentially enhanced when the polymer was negatively charged during contact electrification, while the WOR was preferentially enhanced when the polymer was positively charged. This phenomenon was observed for various conductive materials. The increase in the enhancement of the reaction rates depended on the conductivity and work function of the metal. We expect that this efficient CEC method can form a universal strategy for improving the performance of existing catalysts, as contact electrification is common in nature.
界面接触起电可以通过一种称为接触电催化（CEC）的过程催化氧化还原反应。通过CEC产生活性氧的两个主要反应路径是水氧化反应（WOR）和氧还原反应（ORR）。在此，我们设计了一种聚合物/金属双面复合催化剂，该催化剂基于催化剂组成调节WOR和ORR的反应速率。当聚合物在接触起电过程中带负电时，ORR优先增强，而当聚合物带正电时，WOR优先增强。对于各种导电材料都观察到了这种现象。反应速率增强的增加取决于金属的电导率和功函数。我们期望这种高效的CEC方法能够形成一种通用策略，用于提高现有催化剂的性能，因为接触起电在自然界中很常见。
