Metallic glasses and metallic glass nanostructures for functional electrocatalytic applications

Dealloying of an amorphous TiCuRu alloy results in a nanostructured electrocatalyst for hydrogen evolution reaction

“…Amorphous materials have been regarded as potential candidates for HER catalysis due to their unique structure 13 . Compared with other amorphous materials including alloys and those prepared by wet chemistry, as shown in Figure 5C and Table , d‐TiCuRu has the best HER performance in a basic solution (lowest overpotential and Tafel slope), even surpassing those with high content of noble metals, such as PdPtCuNiP, 14 Ni 40 Pd 40 P 20 , 10 Ni 70 Pd 10 P 20 , 10 and dealloyed IrNiTa alloys 15 .…”

“…Nano‐porous Cu 53 Ru 47 has lower overpotential and Tafel slope than Cu 88 Ru 12 and Cu 35 Ru 65 . However, besides the promise of amorphous metals in electrocatalysis, only a few reports regarding dealloying of amorphous alloys, especially for HER electrocatalysts used in an alkaline medium, have been reported 13 . In addition, most alloy systems, such as Pd 20 Pt 20 Cu 20 Ni 20 P 20 , NiZrTiPt, and IrNiTa, contained high fractions of noble metals, such as Pt, Pd, and Ir, and are therefore expensive 9,14,15 .…”

“…However, besides the promise of amorphous metals in electrocatalysis, only a few reports regarding dealloying of amorphous alloys, especially for HER electrocatalysts used in an alkaline medium, have been reported. 13 In addition, most alloy systems, such as Pd 20 Pt 20 Cu 20 Ni 20 P 20 , NiZrTiPt, and IrNiTa, contained high fractions of noble metals, such as Pt, Pd, and Ir, and are therefore expensive. 9,14,15 The authors prepared noble precious metal-free nanostructured electrocatalysts with good HER properties via dealloying of amorphous FeCoNiPC and TiCuMo alloys.…”

Nanosecond Laser “Pulling” Patterning of Micro–Nano Structures on Zr‐Based Metallic Glass

“…Furthermore, fabricating micro-nano structures on the MG surface would broaden their functional applications in biomedical science, [6][7][8][9] microelectromechanical systems, [10][11][12] and electrocatalysis. [13][14][15] However, owing to the high hardness and wear resistance of MGs, unavoidable tool wear would seriously affect their prepared-surface quality when fabrication is performed using the mechanical machining methods. [16][17][18] In addition, crystallization and oxidation may occur during the high-speed In this study, based on a new physical phenomenon observed during the nanosecond laser line scanning of Zr-based MG (i.e., the resultant surface structure was transformed from the commonly observed microgroove into the micro-nano bulge at a critical peak laser power intensity), a nanosecond laser "pulling" patterning method was proposed to fabricate various micro-nano structures on the MG surface.…”