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Hollow nanostructures of transition metal phosphate are of immense interest in the existing and evolving areas of technology, due to their high surface area, presence of hollow void, and easy tuning of compositions and dimensions. Emerging synthesis methods such as template‐free methods, hard‐templating, and soft‐templating are discussed in this review. Applications of these hollow metal phosphates dominate in energy storage and conversions, with specific advantages as supercapacitor materials. Other applications, including drug delivery, water splitting, catalysis, and adsorption, are reviewed. Finally, additional perspectives on the progress of these nanostructures, and their existing challenges related to the current synthesis routes are covered. Therefore, with the strategic modifications of the unique properties of these hollow metal phosphates, broader application requirements are fulfilled. [ABSTRACT FROM AUTHOR]

Keywords: hollow metal phosphates; transition metal; synthesis method; catalysis; energy storage EN hollow metal phosphates transition metal synthesis method catalysis energy storage 1 1 1 08/09/22 20220801 NES 220801 The cover picture shows the general method to synthesize hollow transition-metal phosphates nanoparticles. Hollow metal phosphates, transition metal, synthesis method, catalysis, energy storage. [Extracted from the article]