Metals as Clean Fuels: Preparation and Stabilization by One-Spot Alloying and Dealloying paves the way to metals as alternative clean fuels, by describing a scalable selective leaching method to activate metal fuels by increasing their surface-to-volume ratio, boosting in that way their reactivity with water for hydrogen and heat generation. This book starts by describing how metal fuels work in Chapter 1, followed in Chapter 2 by methods to activate metal fuels to render them reactive with water. One of these metal fuel activation methods is by introducing nanoporosity in the metal, which is the focus of this book. Also advances in describing and characterizing the (nano) porosity are presented and discussed. In Chapter 3, authors describe how dealloying can be used as an effective method to introduce nanoporosity in metals. Chapters 4 and 5 present the use of dealloying to create nanoporous aluminum in a two-step and a one-spot process, respectively. Because activated metal fuels become pyrophoric, Chapter 6 describes ways to suppress this pyrophoricity tendency. In Chapter 7, ways to harness energy during hydrolysis of metal fuels are discussed, and in Chapter 8, authors close by a perspective and prospective outlook, including context of materials science & engineering in metal fuel economy. Metals as Clean Fuel is a valuable resource for researchers and scientists in the subject areas of materials science and engineering, and those working in the fields of green energy materials, hydrolysis and battery.