Attractive In Situ Self‐Reconstructed Hierarchical Gradient Structure of Metallic Glass for High Efficiency and Remarkable Stability in Catalytic Performance

Abstract

Metallic glass (MG), with the superiorities of unique disordered atomic structure and intrinsic chemical heterogeneity, is a new promising and competitive member in the family of environmental catalysts. However, what is at stake for MG catalysts is that their high catalytic efficiency is always accompanied by low stability and the disordered atomic configurations, as well as the structural evolution, related to catalytic performance, which raises a primary obstacle for their widespread applications. Herein, a non-noble and multicomponent Fe 83 Si 2 B 11 P 3 C 1 MG catalyst that presents a fascinating catalytic efficiency while maintaining remarkable stability for wastewater remediation is developed. Results indicate that the excellent efficiency of the MG catalysts is ascribed to a unique atomic coordination that causes an electronic delocalization with an enhanced electron transfer. More importantly, the in situ selfreconstructed hierarchical gradient structure, which comprises a top porous sponge layer and a thin amorphous oxide interfacial layer encapsulating the MG surface, provides matrix protection together with high permeability and more active sites. This work uncovers a new strategy for designing high-performance non-noble metallic catalysts with respect to structural evolution and alteration of electronic properties, establishing a solid foundation in widespread catalytic applications.

Excellent long-term reactivity of inhomogeneous nanoscale Fe-based metallic glass in wastewater purification

“…As shown in Fig. 7f, the E a of the Fe-MGI catalyst in this work is 34.2 kJ mol −1 , a value lower than observed for crystalline alloys and comparable to those of MG catalysts [40]. After comparing the degradation efficiencies and k obs in MB dye solutions with or without the Fe-MGI catalyst, in the presence of different H 2 O 2 concentrations, dye concentrations, temperatures, and pH values, it can be concluded that Fe-MGI shows good catalytic properties for Fenton-like processes in acid solutions.…”

“…The durability of the present , temperature of 25°C. system is even more stable than those of the most recently reported Fe-MGs with excellent sustainability that can be reused about 35 times [40]. Therefore, Fe-MGI shows sustainable long-term high reactivity.…”

High Entropy Intermetallic–Oxide Core–Shell Nanostructure as Superb Oxygen Evolution Reaction Catalyst

“…Chemically complex catalytic materials have been the subject that attracts tremendous research interest in materials science and engineering. [ 1–3 ] By increasing the chemical complexity of modern catalytic materials, it has been shown that superior properties could be achieved for their use in a variety of important applications, such as wastewater remediation, [ 4–8 ] catalysis, [ 9,10 ] energy storage, [ 11 ] and fuel cells. [ 12 ] Recently, a similar design principle was proposed by metallurgists to enhance the chemical complexity of alloys through the synthesis of multi‐principal element alloys, also known as high entropy alloys (HEAs), [ 13,14 ] for enhanced mechanical properties.…”

Correlation between High Temperature Deformation and β Relaxation in LaCe-Based Metallic Glass

“…Unlike their crystalline counterparts, metallic glasses do not possess defects like grain boundaries and dislocations [1][2][3][4][5][6][7]. Therefore, they show specific mechanical, chemical and physical properties, such as high strength, high hardness and good corrosion resistance [1,4,[8][9][10][11]. As a consequence, metallic glasses are great functional and structural materials from a point of practical application.…”