Catalyst is an effective approach which allows functioning of raw ingredients that can effectively produce great value. With the emerging miniature size technology there is an enhanced demand for catalysts specifically focusing on nano based catalysts that has a potential to improve efficiency, environment friendly, cost effectiveness and consume less energy. This type of catalyst is easily substituted and acts as an alternative resource for a variety of chemical transformations. Objective - The purpose of this study is to explore the properties of Nanoparticles which make them functionalism as a catalyst. Additionally, determine green nanoparticles in Catalysis Application along with the benefits and challenges associated with them. Methodology - The paper choses secondary research approach to accomplish this research which is based on collecting information from already existing similar studies. This research design takes place to explore the topic of the research i.e metal nanoparticles from the lens of green catalyst and its utility and real world through exploring the existing data from electronic resources such as websites, research journals and others. Results - The finding indicated that nanosized catalysts extracted from nanoparticles embedded with green synthesis approach have several benefits because of its characteristics like surface area, strength, stability, environment friendly, cost effective, and durable nature. Despite the number of benefits there are some challenges to producing a catalyst because of advanced technologies and other structuring complexities.