Hydrogen production by aluminum corrosion in aqueous hydrochloric acid solution promoted by sodium molybdate dihydrate

The Underlying Molecular Mechanism of Fence Engineering to Break the Activity–Stability Trade‐Off in Catalysts for the Hydrogen Evolution Reaction

“…We first fixed the potential at −0.1 V vs. RHE, and then collected the UV/Vis spectra of the electrolyte at different electrolysis times. As shown in Figure 4a (left), for Co−MoS 2 , there is a prominent absorption peak at about 222 nm, which can be assigned to the characteristic peak of MoO 4 2− (Figure S1b) [41] . And this peak becomes stronger gradually with prolonging the electrolysis time, suggesting that the main instability pathway of the Co−MoS 2 catalyst is that the high‐valence molybdenum species (Mo 6+ ) in MoS 2 oxidized by the atmosphere (Figure S1a) and dissolved by reacting with OH − to form MoO 4 2− ions.…”

Green synthesis of Size‐Controlled copper oxide nanoparticles as catalysts for H 2 production from industrial waste aluminum

“…32 One important challenge is the highly energy and time (up to 24 hours) consumption during the pretreatment process of waste aluminum precursors with/without catalysts by ball milling. 60,61 Another strategy for improving hydrogen conversion efficiency was directed toward the addition of catalysts such as TiH 2, 62 gallium, 29 sodium molybdate dehydrate, 31 Al(OH) 3, 30 Bi, Ni, and Ni/Bi catalysts, 25 and Ga:In:Sn. 61 Such methods either use high concentration catalysts in the range of 1:1 ratio of Al/catalysts, which are extremely high proportions that enhanced the production cost with high rates.…”

“…21,[25][26][27][28][29][30][31][32] Accordingly, research-based on nanocatalysts to enhance the reaction rate of Al in H 2 O to promptly liberate H 2 gas is an ideal option that is rarely discussed in the literature. [29][30][31][32] In the recent past, the use of nanomaterials as catalysts in energy and environmental fields has received enormous attention. 33 Copper and copper oxide nanoparticles (CuO NPs) have shown exceptional reactivity in recent industrial and technological applications, owing to their novel properties and facile processing.…”

“…In this regard, studies to investigate the role of reaction parameters such as temperature, pH, stirring speed, and salinity addition have been well-conducted but with slow and incomplete reactions. 21,[25][26][27][28][29][30][31][32] Accordingly, research-based on nanocatalysts to enhance the reaction rate of Al in H 2 O to promptly liberate H 2 gas is an ideal option that is rarely discussed in the literature. [29][30][31][32] In the recent past, the use of nanomaterials as catalysts in energy and environmental fields has received enormous attention.…”

The Underlying Molecular Mechanism of Fence Engineering to Break the Activity–Stability Trade‐Off in Catalysts for the Hydrogen Evolution Reaction

“…As shown in Figure 4a (left), for CoÀ MoS 2 , there is a prominent absorption peak at about 222 nm, which can be assigned to the characteristic peak of MoO 4 2À (Figure S1b). [41] And this peak becomes stronger gradually with prolonging the electrolysis time, suggesting that the main instability pathway of the CoÀ MoS 2 catalyst is that the high-valence molybdenum species (Mo 6 + ) in MoS 2 oxidized by the atmosphere (Figure S1a) and dissolved by reacting with OH À to form MoO 4 2À ions. In a sharp contrast, the absorption peak of MoO 4 2À for CoÀ MoS 2 @CoS 2 is fairly weak in intensity and it hardly changes within the tested time of 120 h (Figure 4a, right).…”