Effect of cathodic hydrogen charging on catalytic activity of Cu–Hf amorphous alloys

Synergistic effects of bimetallic catalysis on the cycling behavior of NaAlH4 Co-Doped with Zr and Fe

“…Based on compelling evidence from the literature [21][22][23][24][25][26][27][28][29][30][31][32][33], and based on the observed enhanced performance and synergistic trends with the Zr-Fe system in this work, and the catalytic activity for NaAlH 4 co-doped with Ti-Fe, Zr-Fe and Ti-Zr decreasing as such in previous work [11], the following suppositions might explain these behaviors. The dominant effect on synergy (Zr-Fe, [11] and this work) was perhaps associated with the propensity of the early and late binary metal pairs to form higher polarity metal-metal bonds as they move apart on the periodic table.…”

“…Note that the pre-exponential factor for this system increased by nearly a factor of five after cycling compared to only factors of two and three for Zr-3-Fe-1 and Zr-4, respectively. Overall, these synergistic results alluded to the possibility that the two metal catalysts were forming a more active bimetallic complex, possibly caused by metal-metal bond polarity [21][22][23][24][25][26][27][28][29][30][31][32][33]. The synergistic effects of the Zr-Fe co-metal catalyzed bimetallic system might be associated with the so called metal-metal bond polarity concept associated with two dissimilar metals from the dblock in the periodic table [30].…”

“…The results from single metal and co-metal catalyzed systems are reported to illuminate the synergistic behavior. A brief explanation is offered for the bimetallic effects in terms of the metalmetal bond polarity concept [21][22][23][24][25][26][27][28][29][30][31][32][33].…”

Proposed truncated Cu–Hf tight-binding potential to study the crystal-to-amorphous phase transition

“…15,16 Very recently, the Cu-Hf system has been extensively studied in its GFA and mechanical response. [17][18][19] For instance, Inoue and Zhang 17 reported that glassy alloy rods with diameters up to 1.5 mm were formed in the Cu-Hf binary alloy system by the copper mold casting method. Duan et al 18 later synthesized strip-shaped amorphous samples with thickness from 0.5 to 2 mm for the Cu-Hf system containing 60-68 at.…”

Non-equilibrium alloy formation in the Ag–Zr system by ion beam mixing

“…Moreover, many alloys obtained from these processes have shown unique properties in a number of respects and have become potential for practical applications [6][7][8][9][10]. In particular, ion beam mixing (IBM) of multilayered films has been well recognized as a powerful means for producing non-equilibrium materials in the binary metal systems [7,8,11,12].…”