Carbon nanotube supported direct borohydride fuel cell anode catalysts: the effect of catalyst loading

Energy, vital and permanent need for human life and welfare, supplied by fossil fuels such as oil, coal, and natural gas through the world has been rising gradually. However, the employment of fossil fuels to supply energy need have several disadvantages such as shortage of fossil fuels and global warming caused via fossil fuel exhaust gases. To eliminate these disadvantages of fossil fuel consumption in energy generating systems, research studies are dedicated to the alternative energy sources such as fuel cells, batteries, solar energy, wind energy. Fuel cells are the most popular alternative energy devices and attributed great importance to recompense the rapidly increasing energy demand. Direct Borohydride Fuel Cells (DBFCs), known as a special group of an alkaline direct liquid fuel cell (DLFC). At present, monometallic CNT supported Pd electrocatalysts (Pd/CNT) are prepared at varying Pd loadings via sodium borohydride (NaBH4) reduction method to investigate their NaBH4 electrooxidation activities. These monometallic Pd/CNT catalysts are characterized by X-ray Diffraction (XRD), N2 adsorptiondesorption, X-ray photoelectron spectroscopy (XPS), and Scanning Electron MicroscopyEnergy Dispersive X-ray analysis (SEM-EDX). NaBH4 electrooxidation measurements are performed with cyclic voltammetry (CV), chronoamperometry (CA), and electrochemical impedance spectroscopy (EIS). The 30% Pd/CNT catalyst exhibits the highest electrochemical activity. By altering Pd loading, catalyst surface electronic structure changes significantly, leading to enhanced NaBH4 electrooxidation activity. As a conclusion, it is clear that Pd/CNT catalysts are good candidate as anode catalysts for direct borohydride fuel cells.

Kaynakça

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Kaynak Göster

  • ISSN: 1694-7398
  • Yayın Aralığı: Yılda 2 Sayı
  • Başlangıç: 2001

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