Tóm tắt

Presently the fulfilment of world’s energy demand highly relies on the fossil fueli.e. coal, oil and naturalrngas. Fossil fuels pose threat to environment and biological systems on the earth. Usage of these fuels leadsrnto an increase in the CO2content in the atmosphere that causes global warming and undesirable climaticrnchanges. Additionally, these are limited sources of energy those will eventually dwindle. There is hugernurge of identifying and utilizing the renewable energy resources to replace these fossil fuels in the nearrnfuture as it is expected to have no impact on environment and thus would enable one to provide energyrnsecurity. Hydrogen is one of the most desirable fuel capable of replacing vanishing hydrocarbons. In thisrnreview we present the status of energy demands, recent advances in renewable energy and the prospectsrnof hydrogen as a future fuel are highlighted. It gives a broad overview of different energy systems andrnmainly focuses on different technologies and their reliability for the production of hydrogen in presentrnand future