IIn this work, solid-core@porous-shell alloyed PtAg nanocrystals (PtAg NCs) were fabricated via a simple one-pot co-reduction wet-chemical method on a large scale. Diprophylline (DPP) was employed as the stabilizing agent and shape-directing agent, without any surfactant, polymer, seed or template. The products were mainly analyzed by a series of characterization technique. The hierarchical architectures had enhanced stability and improved electrocatalytic activity for hydrogen evolution reaction (HER) and glycerol oxidation reaction (GOR) in contrast with commercial available Pt/C and Pt black catalysts. For the prepared PtAg NCs catalyst, the Tafel slope is 40 mV dec(-1) toward HER in 0.5 M H2SO4, coupled with the specific activity and mass activity of 77.91 mA cm(-2) and 1303 mA mg(pt)(-1) toward GOR, respectively. (C) 2017 Elsevier Inc. All rights reserved.