Chen Yuanxing, Qin Ying, Liu Mingwang, Yang Wenhong, Qiu Yiwei, Li Wen, Zheng Lirong, Gu Wenling, Zhu Chengzhou, Hu Liuyong
Hubei Key Laboratory of Plasma Chemistry and Advanced Materials, Hubei Engineering Technology Research Center of Optoelectronic and New Energy Materials, Wuhan Institute of Technology, Wuhan, China.
State Key Laboratory of Green Pesticide, International Joint Research Center for Intelligent Biosensing Technology and Health, College of Chemistry, Central China Normal University, Wuhan, China.
Nat Commun. 2025 Mar 26;16(1):2960. doi: 10.1038/s41467-025-58174-x.
Energy level mismatches between semiconductors and cocatalysts often induce carrier recombination, limiting photocatalytic and photoelectrochemical (PEC) efficiency. Here, we integrate Pt nanocluster-Fe single-atom pairs with CuO to regulate both solid-solid and solid-liquid interfaces in PEC systems. Experimental and theoretical analyses reveal that an Ohmic contact at the CuO/Pt interface accelerates electron extraction, while Pt-to-Fe charge transfer enhances oxygen reduction at Fe sites, collectively boosting reaction kinetics. Leveraging this, we construct a PEC biosensor exploiting chelating effect of glyphosate on CuO to impede electron transfer, achieving a detection limit of 0.41 ng/mL. This interface engineering strategy advances cocatalyst design for enhanced energy conversion and sensing applications by simultaneously addressing carrier dynamics and interfacial reaction barriers.
半导体与助催化剂之间的能级不匹配常常会引发载流子复合，从而限制光催化和光电化学（PEC）效率。在此，我们将铂纳米团簇-铁单原子对与氧化铜相结合，以调控PEC系统中的固-固和固-液界面。实验和理论分析表明，氧化铜/铂界面处的欧姆接触加速了电子提取，而铂到铁的电荷转移增强了铁位点处的氧还原，共同促进了反应动力学。利用这一点，我们构建了一种PEC生物传感器，利用草甘膦对氧化铜的螯合作用来阻碍电子转移，实现了0.41纳克/毫升的检测限。这种界面工程策略通过同时解决载流子动力学和界面反应障碍，推动了用于增强能量转换和传感应用的助催化剂设计。
