Fabricated of bimetallic Pd/Pt nanostructure deposited on copper nanofoam substrate by galvanic replacement as an effective electrocatalyst for hydrogen evolution reaction. (8th June 2015)

• Record Type: Journal Article
• Authors: Rezaei, Behzad; Mokhtarianpour, Maryam; Ensafi, Ali Asghar
• Is Part Of: International journal of hydrogen energy. Volume 40:Number 21(2015)
• Page Start: 6754
• Page End: 6762
• Publication Date: 2015-06-08
• Subjects: Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2015.03.122
• Languages: English
• ISSNs: 0360-3199

Abstract

<abstract xml:lang="en" abstract-type="author" id="abs0010"> <title id="sectitle0010">Abstract</title> <sec> <p id="abspara0010">The effective Pd/Pt bimetallic nanofoam catalyst (Pd/Pt NFC) was fabricated on Cu nanofoam substrate. The substrate was electrochemically prepared by copper reduction and covered with Pd/Pt NFC by galvanic replacement reaction in aqueous solutions of Pd (II) and Pt (IV). The catalyst was characterized by SEM, EDX, ICP-OES and EIS techniques. It was tested for the hydrogen evolution reaction (HER) in the acidic media by linear sweep voltammetry (LSV). Among of various compositions, Pd₆₅Pt₃₅ catalyst showed better performance in comparison with pure Pt NFC for HER. The mass activity of noble metals on the Pt NFC and Pd₆₅Pt₃₅ NFC, at the same potential of −300 mV vs. NHE, were about 3.21 mA μg⁻¹_Pt and 4.98 mA μg⁻¹_Pt+Pd, respectively. Consequently, proposed catalyst increased HER activity about 1.5 times and decreases Pt loading on the surface and cost of catalyst. The obtained results show that the Volmer-Heyrovsky mechanism controls the HER. The fabricated catalyst showed a good stability for HER by chronoamperometric method.</p> </sec> </abstract>