Multi-branched Pd-coated PtNi core-shell nano catalyst synthetic method

Abstract

The invention discloses a multi-branched Pd-coated PtNi core-shell nano catalyst synthetic method, which is a one-step synthetic method. By using a one-pot liquid-phase reduction method, under condition of programmed heating, grading reduction is carried out, firstly, reduction is carried out to generate a Pd core, then reduction is carried out at the surface of the Pd core to generate a PtNi ultrathin shell layer, one-step controlled synthesis of core shell distribution of the components is realized, tedious operation and a complex process of a traditional two-step crystal growth method can be avoided, the prepared Pd-coated PtNi core-shell nano material has a multi-branched structure having a high specific surface area and high catalytic activity, and has good catalyst performance.

Description

technical field [0001] The invention relates to a synthesis method of a multi-branched Pd@PtNi core-shell nano catalyst. Background technique [0002] With the rapid development of social economy, the shortage of energy resources and the increasingly serious problems of environmental pollution, the research on the acquisition, transformation and synthesis of green and efficient energy has become an urgent need. Electrocatalytic technology has attracted more and more attention due to its wide application in important fields such as environmental engineering, energy conversion and storage, and biomedicine. The important task of electrocatalysis research is to develop efficient and stable catalysts. [0003] At present, metal platinum (Pt) and platinum-based materials are highly efficient catalysts in many catalytic reactions, such as electrocatalytic oxidation of alcohols, electrocatalysis of oxygen reduction, and electrolysis of water. However, the high price and scarcity o...

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Problems solved by technology

However, the above methods are all based on a two-step seed crystal growth method, first synthesize Pd nanocrystals, then use Pd nanoparticles as seeds, deposit a PtNi alloy shell on its surface, and synthesize two-dimensional structure nanosheets or other shell cores. Structure-based, its operation process is complex and difficult

So far, there is no convenient method for one-step synthesis of multi-dendritic Pd@PtNi core-shell nanocrystals

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