Coreduction methodology for immiscible alloys of CuRu solid-solution nanoparticles with high thermal stability and versatile exhaust purification ability

Abstract

This study provides a coreduction methodology for solid solution formation in immiscible systems, with an example of a whole-region immiscible Cu–Ru system.

Slow Synthesis Methodology‐Directed Immiscible Octahedral PdxRh1−x Dual‐Atom‐Site Catalysts for Superior Three‐Way Catalytic Activities over Rh

“…However, there are significant challenges in synthesizing solid solutions, especially for immiscible alloys, whose constituent elements cannot be mixed in the bulk‐scale phase diagram [9] . We have proposed a coreduction methodology in immiscible alloy systems by measuring the reaction times of different precursors [13] . For some immiscible alloy systems whose coreduction conditions could not be found in practical, fast synthesis methodology is used to prepare alloys by increasing the reduction rate of metal precursors simultaneously, such as adding alkalis [14] .…”

“…[9] We have proposed a coreduction methodology in immiscible alloy systems by measuring the reaction times of different precursors. [13] For some immiscible alloy systems whose coreduction conditions could not be found in practical, fast synthesis methodology is used to prepare alloys by increasing the reduction rate of metal precursors simultaneously, such as adding alkalis. [14] However, with inevitable reaction rate difference, fast synthesis methodology is highly sensitive to temperature and concentration gradients, [15] thus it is hard to form the homogeneously distributed solid-solution alloys as DASC.…”

Innovative approach to controlled Pt–Rh bimetallic nanoparticle synthesis

“…9,10 Additionally, for the bimetallic Cu-Ru, Pd-Ru, Au-Ir, Cu-Ir and Au-Ru systems, solid solution nanoparticles have been reported whereas their bulk counterparts cannot be obtained. [11][12][13][14][15][16] These examples represent great achievements with respect to the ability to tune the physicochemical properties of functional materials in general, and to tailor them for applications such as catalysis where e.g. the electronic structure of the nanoparticles is of relevance.…”

“…This issue can be mitigated by applying the more complex injection-based methods, [12][13][14][15][16] or alternatively by searching for a suitable reaction matrix with respect to choice of metal precursors, solvent and surface stabilizing agent(s) that tame the reaction kinetics of the faster metal precursor to match the slower one. 11 The rst strategy leads to the drawbacks of the hot-injection operation, which requires extreme control of user-dependent synthesis parameters that affect the reproducibility of the product characteristics between batches and operators. The latter strategy is quite an elaborate process, in addition to being very system specic.…”

Boosting CO2 electroreduction over Co nanoparticles supported on N,B-co-doped graphitic carbon

“…To date, the main catalysts used in the electrocatalytic CO 2 RR of CO 2 to CO include noble metals (Au, Ag, and Pd), 13–15 oxides (CuO, ZnO, and Bi 2 O 3 ), 16–18 chalcogenides (Cu 2 S, CdS, and MoS 2 ), 19–21 alloys (Pd–Ag, Co–Au, and Cu–Ru), 22–24 single-atom catalysts 25–28 and some carbon materials. 29–31 These catalysis processes can efficiently hinder the hydrogen evolution reaction (HER), which is competitive with CO 2 RR.…”