Severe carrier recombination and the slow kinetics of water splitting for photocatalysts hamper their efficient application. Herein, we propose a hydrovoltaic effect-enhanced photocatalytic system in which polyacrylic acid (PAA) and cobaltous oxide (CoO)–nitrogen doped carbon (NC) achieve an enhanced hydrovoltaic effect and CoO–NC acts as a photocatalyst to generate H₂ and H₂O₂ products simultaneously. In this system, called PAA/CoO–NC, the Schottky barrier height between CoO and the NC interface decreases by 33% due to the hydrovoltaic effect. Moreover, the hydrovoltaic effect induced by H⁺ carrier diffusion in the system generates a strong interaction between H⁺ ions and the reaction centers of PAA/CoO–NC, improving the kinetics of water splitting in electron transport and species reaction. PAA/CoO–NC exhibits excellent photocatalytic performance, with H₂ and H₂O₂ production rates of 48.4 and 20.4 mmol g⁻¹ h⁻¹, respectively, paving a new way for efficient photocatalyst system construction.

严重的载流子重组和光催化剂分解水的缓慢动力学阻碍了它们的有效应用。在此，我们提出了一种水电效应增强的光催化系统，其中聚丙烯酸 (PAA) 和氧化钴 (CoO)-氮掺杂碳 (NC) 实现了增强的水电效应，CoO–NC 作为光催化剂产生 H 2_和H ₂ O ₂产物同时存在。在这个称为 PAA/CoO-NC 的系统中，CoO 和 NC 界面之间的肖特基势垒高度由于水电效应降低了 33%。此外，系统中H ⁺载流子扩散引起的水伏效应在H ^{+之间产生强烈的相互作用}离子和 PAA/CoO-NC 的反应中心，改善电子传输和物种反应中水分解的动力学。PAA/CoO–NC表现出优异的光催化性能，H ₂和H ₂ O ₂产率分别为48.4和20.4 mmol g ⁻¹ h ⁻¹，为高效光催化剂体系构建开辟了新途径。