Electrocatalysis, as a typical heterogeneous catalysis, generally occurs in the di- or tri-phase interfaces. Wettability is an important property for describing the balance of a gas-liquid-solid system. Therefore, the wettability of reaction interface, especially hydrophilicity/hydrophobicity, plays an important role in the adsorption/desorption process of gas bubbles on the surface of the solid electrode. Herein, we present a comprehensive review of the wettability control of the electrode materials applied in electrocatalysis reactions, including hydrogen evolution reaction (HER), oxygen evolution reaction (OER), oxygen reduction reaction (ORR) and carbon dioxide reduction reaction (CO₂RR). Firstly, the basic theories of wettability as well as the impact on electrocatalysis were introduced in this review. Secondly, the overview of modifying methods of the wettability from electrocatalyst microstructure (structural modification, surface coating, introducing hydrophilic groups) and system design (electrode, device) were suggested. At last, the deficiencies and problems in the application of wettability control are discussed, and deeper and broader application prospects are proposed.

电催化作为典型的多相催化，通常发生在二相或三相界面。润湿性是描述气-液-固系统平衡的重要特性。因此，反应界面的润湿性，尤其是亲水性/疏水性，在固体电极表面气泡的吸附/解吸过程中起着重要作用。在此，我们全面回顾了应用于电催化反应的电极材料的润湿性控制，包括析氢反应 (HER)、析氧反应 (OER)、氧还原反应 (ORR) 和二氧化碳还原反应 (CO ₂RR）。本文首先介绍了润湿性的基本理论及其对电催化的影响。其次，从电催化剂的微观结构（结构改性、表面涂层、引入亲水基团）和系统设计（电极、器件）两个方面对润湿性的改性方法进行了概述。最后讨论了润湿性控制应用中存在的不足和问题，提出了更深更广的应用前景。