脱合金化法制备纳米多孔铂合金的研究进展

doi:10.11896/cldb.21020061

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Abstract Nanoporous metals are composed of nano-sized pores and metal ligaments, and have a three-dimensional interpenetrating ligament-channel architecture. They possess dual characteristics of nano-materials and metal materials, and exhibit broad application prospects in the fields of catalysis, sensing, drug delivery, and so forth. Dealloying is one of the most popular methods for preparing the nanoporous alloys because of its simple operation, short process flow and relatively low cost. At present, nanoporous Pt alloys prepared by the dealloying method have attracted considerable attention due to their excellent catalytic activity for methanol oxidation reaction (MOR) and oxygen reduction reaction (ORR), which are expected to be applied in fuel cells and other related fields.
In recent years, researchers have diversified the nanoporous Pt alloy systems, tailored and controlled the structure and performance by optimizing the alloy composition and dealloying process, and developed a variety of forms of the nanoporous Pt alloys. The influences of the structure and composition of the precursors and dealloying process parameters on the microstructure, morphology and properties of the nanoporous Pt alloys have been systematically investigated, and the mechanisms of the nanoporous formation and excellent properties have been studied extensively.
The nanoporous Pt alloys developed by the dealloying has a variety of forms, such as low-dimensional nanoparticles, nano-flowers, nanowires and films, along with three-dimensional nanoporous ribbons. The low-dimensional nanoporous Pt alloys exhibit outstanding catalytic activity due to high specific surface area and nano-size effect, while the three-dimensional nanoporous ribbons have a uniform nanoporous structure and can overcome the agglomeration of the low-dimensional alloys. The effective tailoring and control of the nanoporous structure and morphology have been achieved by adjusting the chemical composition and structure of the precursor alloys, changing the dealloying process parameters, and annealing the nanoporous alloys. In comparison with commercial supported Pt/C, the catalytic performance on the MOR and ORR of the nanoporous Pt alloys is superior. The magnetic nanoporous Pt alloys can combine catalysis and magnetic separation to realize the easy recovery and reuse of the catalysts. In addition, the magnetic nanoporous Pt alloys also have huge application potential in filtration and drug delivery.
In this paper, we have reviewed the research progress in the nanoporous Pt alloys from the aspects of dealloying process and its mechanism, preparation and structure control, as well as properties and applications, and have discussed the current problems and future development orientations of the nanoporous Pt alloys.

Key words： nanoporous metal nanoporous Pt alloy dealloying catalytic property magnetic property

Published: 10 February 2023 Online: 2023-02-23

CLC number:

TG146.3

Fund:The National Natural Science Foundation of China (51771039, 51871039).

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	YANG Yaping
	LI Yanhui
	ZHANG Wei

Cite this article:

YANG Yaping,LI Yanhui,ZHANG Wei. Research Progress in Nanoporous Pt Alloys Prepared by Dealloying[J]. Materials Reports, 2023, 37(3): 21020061-7.

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http://www.mater-rep.com/EN/10.11896/cldb.21020061 OR http://www.mater-rep.com/EN/Y2023/V37/I3/21020061

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