2D Metals: Fundamentals, Emerging Applications, and Challenges delves into the state-of- the-art advancements in utilizing 2D metals for emerging applications, encompassing a comprehensive overview of synthetic methodologies and characterization techniques provided by leading experts in the field. 2D nanomaterials have emerged as highly promising candidates for a diverse array of cutting-edge applications, spanning energy and biomedicine, owing to their adjustable electrochemical properties, versatility, and exceptional mechanical resilience. Notably, carbon-based 2D materials have already demonstrated extensive utility across various domains. Meanwhile, 2D metals, often referred to as Metallenes, represent a burgeoning class of materials with broad reaching potential. In contrast to alternative 2D materials like graphene and transition metal chalcogenides, as well as bulk metals, 2D metals exhibit remarkable conductivity, expansive surface area, and customizable electronic and optoelectronic characteristics. This book explores the influence of structural modifications on the properties of 2D metals and addresses the myriad challenges associated with their burgeoning applications. Each chapter, authored by esteemed specialists from across the globe, offers invaluable insights, rendering this book an indispensable resource for students while furnishing researchers and industry professionals with novel guidance and perspectives.