Review on hydrogen storage materials and methods from an electrochemical viewpoint

Hydrogen being clean energy source is an effective substitute to current fossil fuels. Present day advancement in hydrogen economy field has motivated researchers to work in green energy field. Different types of methods are in use to store hydrogen. Our review focuses initially on various types of sustainable and non-renewable energy sources, then with emphasis towards hydrogen economy, we discuss in details about it. Hydrogen is efficient candidate amongst vivid sustainable source of energy. Hydrogen advantages and its applications in different fields are covered. Initially discussing different methods to synthesize hydrogen, we shift towards the hydrogen storage methods. Amongst all the hydrogen storage methods, electrochemical method is best, as hydrogen is generated, stored in situ at normal pressure and temperature conditions. Different methods can be used to study hydrogen storage by electrochemical means. Various materials that can efficiently store hydrogen, were covered. Hydrogen is most common fuel in fuel cell, hence classification of hydrogen fuel cells and their relevance with respect to stationary and portable fields are covered.