Advances in metals and metal hybrids-based gas sensors and their applications

Abstract As a kind of node on the Internet of Things, gas sensor is specifically utilized for detecting gaseous chemical species and humidity. Functioning as a kind of discrete electronic components, gas sensors have been extensively implemented in many fields, including agricultural production, public safety, healthcare activity, dual-carbon strategic initiatives, new energy vehicles, food engineering, etc. Metals and metal hybrids are one of the most important classes of sensitive materials. In this review article, the advancements in gas sensors based on metals and metal-hybrid materials have been comprehensively introduced, focusing on their unique mechanisms, performance enhancements, and practical applications. Critical thinking and ideas regarding the orientation of the development of metals and metal hybrids-based gas sensors in the future are discussed. Graphical abstract