Hydrogen generation from nanoflower platinum films

Corrosion resistance of porous ferritic stainless steel produced by liquid metal dealloying of Incoloy 800

“…Chemical dealloying consists on a selective dissolution of metals from binary alloy in various acids and bases solution with a control of the temperature [24,25]. In some cases, hydrogen generation is reported during chemical and electrochemical dealloying that later affects the mechanical properties of the porous material [26]. Unlike chemical dealloying, liquid metal dealloying (LMD) can be used to prepare submicron-scale porous samples with less noble metals including Ti, Fe, Cr, Nb, Mg [27][28][29][30] while limiting secondary reactions in the solution, as hydrogen evolution.…”

Photocatalytic Hydrogen Evolution by Flexible Graphene Composites Decorated with Ni(OH)2 Nanoparticles

“…14,15 Although these nanocomposite materials with carbon compounds have improved the hydrogen generation with respect to those without carbon, all of them are powders, and their removal from the solvent (alcohol or water) is difficult because they remain dispersed as colloids in the solvent after the H 2 production. Therefore, some catalytic materials have been fabricated as flexible films or sponges to facilitate their removal after the water splitting: (1) Miao et al published an easy method to deposit Ni−Mo−S sheets on carbon fiber textiles and produced hydrogen by electrocatalysis in neutral electrolyte, 22 but they employed a biomolecule L-cysteine which could be degraded during the hydrogen evolution; (2) Rao et al fabricated a Ni(OH) 2 /nickel foam with good electrocatalytic activity and durability for hydrogen evolution reaction (HER), but those authors needed relatively high overpotentials (0.49 V) for the catalytic reaction; 23 (3) Sankir et al reported the use of a flexible film composed of platinum and Teflon and produced hydrogen with a high rate of 0.695 mol/h in the presence of HCl, 24 but the main problem of this film is the cost of Pt metal and Teflon. Furthermore, other groups have reported the use of solid electrodes formed by the deposition of WO 3 and NiSe 2 films on FTO and Au-glass solid substrates for H 2 production 25,26 by photoelectrochemical or electrocatalytical methods.…”

Dealloyed Ruthenium Film Catalysts for Hydrogen Generation from Chemical Hydrides

“…There are various catalyst systems in the area of hydrogen generation. These are generally based on noble metals, non-noble metals, alloys, and metal-free systems [ 6 , 7 , 8 , 9 , 10 , 11 ]. While inexpensive transition metal catalysts usually have moderate catalytic activity, noble metal catalysts exhibit excellent catalytic activity with high cost.…”

“…The catalytic activity of the powdered systems ranges from 0.25 to 4.0 mL min −1 g catalyst −1 [ 21 ]. However, film and foam systems have higher catalytic activity, which are close to 30 L min −1 g catalyst −1 [ 6 ]. The highest catalytic activity is up to 150 L min −1 g catalyst −1 , and might be higher than has usually been achieved by the supported systems [ 6 , 21 ].…”

“…Dealloying or selective dissolution includes the removal of one or more components out of an alloy. It is a process providing fast and direct production of nanoporous materials, which have high surface area and are of considerable interest for use in various applications such as sensors, electrodes, hydrogen storage, and catalysis [ 6 , 23 , 24 , 25 ]. In this study, we are reporting the one-step formation of thin-film catalyst by dealloying Ru-Cu alloys which are prepared by cosputtering of Cu and Ru at various compositions for use in the area of hydrogen generation.…”