Controlling rhodium-based nanomaterials for high-efficiency energy-related electrocatalysis

Abstract

The design and control of rhodium (Rh)-based nanomaterials have become critical strategies for enhancing electrocatalyst performance in energy-related applications. Recent advancements in this field have led to the development of diverse Rh-based nanostructures with tailored properties, achieving significant improvements in catalytic efficiency and durability. Thus, a comprehensive understanding of Rh-based nanomaterials, and their roles in electrocatalysis is vital for advancing future research and application. This review systematically summarizes design strategies and structural characteristics of various Rh-based nanomaterials, including three-dimensional (3D), two-dimensional (2D), one-dimensional (1D), zero-dimensional (0D) structures such as clusters and single-atom catalysts. Additionally, we highlight electrochemical performance enhancement strategies through catalyst design, including surface and interface engineering, strain engineering, defect engineering, and alloying effect. Furthermore, we discuss their applications in critical electrocatalytic reactions, including water electrolysis, nitrogen cycle processes, and fuel cell cathode and anode reactions, while analyzing their structure-activity relationships and mechanisms. This review serves as a critical link between material design and electrocatalytic performance of Rh-based nanomaterials, offering an invaluable reference for researchers in the field. Finally, we also identify key challenges and propose future opportunities to inspire the rational design of Rh-based catalysts for sustainable energy technologies.