Tổng hợp và đặc tính của các hạt nano xúc tác hợp kim PtNi/C cho phản ứng khử oxy trong các tế bào nhiên liệu màng trao đổi proton

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Tác giả:

Ngôn ngữ: vie

Ký hiệu phân loại: 541.378 Magnetochemistry

Thông tin xuất bản: Nanoscience and nanotechnology, 2015

Mô tả vật lý: 45297

Bộ sưu tập: Metadata

ID: 509189

In this report, vulcan XC-72 supported PtNi alloy catalyst nanoparticles were synthesized by electroless deposition method using NaBH4 as a reduction agent. The properties of the synthesized Pt-Ni/C catalysts were investigated and evaluated. Transmission electron microscopy (TEM) results showed that PtNi alloy catalysts dispersed well on the carbon supports and their particle size was in the range of 4-8 nm. X-ray diffraction (XRD) analysis confirmed that the crystal lattice of Pt and PtNi alloy is face centered cubic. In the presence of Ni atom, an XRD pattern showed that structure of PtNi alloy crystal was contracted, which affected the catalyst's properties. The activity of the catalyst was estimated by electrochemical methods including cyclic voltamrnetry (CV) and linear sweep voltarnmetry (LSV). The electrochemical results indicated that the activity of PtNi/C alloy catalysts toward oxygen reduction reaction on cathode of PEMFC was higher in comparison with Pt/C catalysts.
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