(i) formation of pinhole-free nanoshells with homogeneous, uniform walls of Au/Ag alloys via a combination of the replacement reaction and alloying; and (ii) formation of porous nanoshells (nanocages) through a dealloying process, in which Ag was selectively dissolved from the walls made of ...
This study presents a novel process for the fabrication of metal–intermetallic composites with a 3D bicontinuous structure, achieved through a combination of liquid metal dealloying (LMD) and subsequent alloying. Initially, porous Ti structures are produced using the LMD process, followed by immersion...
Theoretical estimates based on curvature effects in alloy dissolution suggested the development of a porous structure with 2 nm average ligament size during the initial stages of the dealloying process. A delicate balance between metal dissolution, ion solubility, and mass transport in the electrolyte ...
Dealloying is a common corrosion process during which an alloy is ‘parted’ by the selective dissolution of the most electrochemically active of its elements. This process results in the formation of a nanoporous sponge composed almost entirely of the more noble alloy constituents1. Although conside...
While an electrochemically less noble element in the precursor material selectively dissolves into an electrolyte during the dealloying process, a relatively nobler element remains undissolved and a nanoporous structure is then formed via atomic diffusion [14]. Despite the advantages of dealloying in ...
processes. Through the usage of hydrogen as a reductant agent and energy carrier instead of carbon, the whole dealloying-alloying process is CO2-free and the only byproduct is water. Thermodynamic modeling demonstrates the feasibility of this technique for metals like iron, nickel, cobalt, and ...
Porous Pt alloy nanowires have more durability and catalytic activity than Pt/C. Dealloying is a facile way to make nanoporous Pt. However, the process of porosity formation is difficult to control. In this paper, electrospinning and chemical dealloying techniques are used to make long, thin ...
of the dealloying process occurring on the S-phase particles (Al–Cu–Mg) during corrosion, revealing the details of a copper-rich sponge-like structure... T Hashimoto,M Curioni,X Zhou,... - 《Surface & Interface Analysis》 被引量: 23发表: 2013年 Strain development in nanoporous metallic...
Three-dimensional imaging enabled the study of the dealloying process occurring on the S-phase particles (Al–Cu–Mg) during corrosion, revealing the details of a copper-rich sponge-like structure. Initially, dealloying proceeds by initial formation of a copper-rich nanoporous layer containing ...
These progressively extend in three dimensions producing a continuous network of ligaments and pores both with size in the nanometer range. The majority of information available to date on the electrochemistry of the de-alloying process and on the resulting structure and morphology of ligaments, ...