The development of clean sustainable energy conversion technologies to deal with energy shortage and environmental pollution has aroused a widespread concern. To improve the rate and selectivity of the pivotal chemical reactions involved in these technologies, high-performance electrocatalysts are crucial. Alloys have sparked research hotspot in electrocatalysis because of their higher catalytic activity, stability, and selectivity than their single-metal counterparts. In this review, the design strategies for alloy electrocatalysts are firstly introduced with a focus on how to achieve optimal performance by composition regulation, size optimization and morphology control. Subsequently, we offer a comprehensive overview of the electrocatalytic applications of binary, ternary, quaternary, and high-entropy alloys to different types of electrochemical energy conversion processes, including the hydrogen evolution, oxygen evolution, oxygen reduction, CO₂ reduction, formic acid oxidation, methanol oxidation, and ethanol oxidation reactions. Finally, the challenges and future outlook are presented for the rational design of advanced alloy electrocatalysts.

发展清洁可持续的能源转换技术以应对能源短缺和环境污染问题引起了广泛关注。为了提高这些技术中涉及的关键化学反应的速率和选择性，高性能电催化剂至关重要。合金因其比单金属合金更高的催化活性、稳定性和选择性而成为电催化领域的研究热点。在这篇综述中，首先介绍了合金电催化剂的设计策略，重点是如何通过成分调节、尺寸优化和形貌控制来实现最佳性能。随后，我们全面概述了二元、三元、四元、₂还原、甲酸氧化、甲醇氧化、乙醇氧化等反应。最后，提出了合理设计先进合金电催化剂的挑战和未来展望。