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The emphasis put on future “Hydrogen Economy” requires technologies further develop around “production”, “storage” and “utilization” for durability and cost reduction. Extended life time, performance and higher efficiencies are reported for fuel cell technologies utilizing nanostructures (tubes, fibers, and particles). New nanocomposites, better catalyst utilizations, nanoscale engineering of interfaces are some of the examples of success in energy applications. This wide spread popularity will result advancement against issues preventing commercialization of hydrogen technologies and fuel cell systems.