One-Pot Synthesis of Size- and Composition-Controlled Ni-Rich NiPt Alloy Nanoparticles in a Reverse Microemulsion System and Their Application

• Published in: ACS applied materials & interfaces Vol. 9; no. 36; pp. 30643 - 30653
• Main Authors: Biausque, Gregory M, Laveille, Paco V, Anjum, Dalaver H, Zhang, Bei, Zhang, Xixiang, Caps, Valérie, Basset, Jean-Marie
• Format: Journal Article
• Language: English
• Published: United States American Chemical Society 13.09.2017; Washington, D.C. : American Chemical Society
• Subjects: air; alloy nanoparticles; alloys; aluminum oxide; ambient temperature; catalytic activity; Chemical Sciences; hydrazine; Material chemistry; methane; nickel; platinum; synthesis; nickel; platinum; alloy; nanoparticles; microemulsion; dry reforming
• ISSN: 1944-8244; 1944-8252; 1944-8252
• DOI: 10.1021/acsami.7b08201

Bimetallic nanoparticles have been the subject of numerous research studies in the nanotechnology field, in particular for catalytic applications. Control of the size, morphology, and composition has become a key challenge due to the relationship between these parameters and the catalytic behavior of the particles in terms of activity, selectivity, and stability. Here, we present a one-pot air synthesis of 2 nm Ni9Pt1 nanoparticles with a narrow size distribution. Control of the size and composition of the alloy particles is achieved at ambient temperature, in the aqueous phase, by the simultaneous reduction of nickel and platinum precursors with hydrazine, using a reverse microemulsion system. After deposition on an alumina support, this Ni-rich nanoalloy exhibits unprecedented stability under the harsh conditions of methane dry reforming.