▎ 摘　　要

NOVELTY - Method for forming noble metal nanostructures on support involves mixing one or more noble metal precursor with a first solvent and a base to obtain a noble metal precursor solution, feeding the noble metal precursor solution to a spiral tube reactor, heating the spiral tube reactor containing the noble metal precursor solution to reduce the one or more noble metal precursor to obtain noble metal nanostructures, and mixing a support ink with the noble metal nanostructures obtained after heating, where the support ink comprises a second solvent, the support and an ink acid. USE - The method is useful for forming noble metal nanostructures on support, which are used as electro-catalyst in electrode for fuel cell applications (all claimed). ADVANTAGE - The method avoids higher loading of the expensive noble metals in membrane-electrode assembly thereby increasing the cost-effectiveness, has rapid and consecutive flow reduction which can save power, time and preparation cost, does not require the use of a surfactant, is economically attractive and easy to operate. The noble metal nanostructures on support have an increased electrochemical surface area and an increased kinetic current density as compared with conventional methods for forming noble metal nanostructures on a support, having the same noble metal loading. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for noble metal nanostructures on the support produced by the above method.