Ultrahigh hydrogen-sorbing palladium metallic-glass nanostructures

Abstract

The hydrogenation mechanism in a Pd–Si–Cu metallic glass nanofilm, and its post-characterization by chronoamperometry/cyclic voltammetry and HR(S)TEM analyses.

Metallic Glass Films with Nanostructured Periodic Density Fluctuations Supported on Si/SiO2as an Efficient Hydrogen Sorber

“…Pd79Si16Cu5 NFs showing enhanced electrosorption and electrocatalytic behavior (NF4), as well as polycrystalline PdNF, was also investigated for comparison. 3,6 In the NMGF and Si/SiO2 assembly, the main function of the NMGF is the hydrogen storage via electrosorption using a combinatorial chronoamperometry and cyclic voltammetry. The substrate Si/SiO2 is chosen due to several reasons.…”

“…The trigonal prisms construct a cluster structure, and the clusters form random cluster networks; thus, H atoms are supposed to occupy the free volume between the clusters 33 . However, compared to fully amorphous as-sputtered state 6 , we have recently proven that hydride crystals on the order of 5 nm are formed 3 . Thus we believe that the hydride is sorbed both in tiny nanocrystals and amorphous clusters surrounding them.…”

“…2 In terms of hydrogen interactions, compared to lattice expansion of the Pd polycrystal nanofilms of the same thickness (50 nm), the calculated maximum H⁄M=1.56 for Pd79Si16Cu5 MG thin film is around 2.5 times larger. 3 Here, the third element Cu disturbs the symmetry of the PdSi-MGs leading to the formation of new interstitial positions for enhanced hydrogen sorption. 4,5 In terms of the sorption capacitance 10.1002/chem.202001596…”

Enhancement of Interfacial Hydrogen Interactions with Nanoporous Gold-Containing Metallic Glass

“…New-generation Pd-based nanomaterials are promising candidates to enhance the efficiency of hydrogen interactions, thus providing green alternatives for nanoscale energy applications. Among these, Pd-metallic glasses (MGs) have recently garnered significant recognition in a variety of energy applications, including hydrogen storage and release, − hydrogen evolution reaction (HER), − hydrogen oxidation reaction in fuel cells, methanol/ethanol electrooxidation, − glucose sensors, MEMS hydrogen sensor, − and hydrogen permeation membranes. − The grain-free structure of metallic glasses, along with the presence of free volume between atomic clusters, are advantages of Pd-MGs over polycrystalline Pd (alloys) in terms of hydrogen storage and release as well as electrochemical stability in long-term use. ,,,, …”

Hydrogen storage performance of the multi-principal-component CoFeMnTiVZr alloy in electrochemical and gas–solid reactions

“…35 CV is also used to analyze the sorption and desorption behavior of hydrogen and electrocatalytic behavior in various materials and applications. [36][37][38][39][40][41][42][43][44][45][46][47][48][49] Hydrogen absorption and evolution reactions have attracted growing interest in the past years due to their insufficient kinetics, i.e. low conductivity of OH À ions in alkaline electrolytes.…”