Ulas, BerdanCaglar, AykutSahin, OzlemKivrak, Hilal2025-05-102025-05-1020180021-97971095-710310.1016/j.jcis.2018.07.1202-s2.0-85050816563https://doi.org/10.1016/j.jcis.2018.07.120https://hdl.handle.net/20.500.14720/16019Kivrak, Hilal/0000-0001-8001-7854; Ulas, Berdan/0000-0003-0650-0316In the present study, the carbon supported Pd, PdAg and PdAgNi (Pd/C, PdAg/C and PdAgNi/C) electrocatalysts are prepared via NaBH4 reduction method at varying molar atomic ratio for formic acid electrooxidation. These as-prepared electrocatalysts are characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), inductively coupled plasma mass spectrometry (ICP-MS), N-2 adsorption desorption, and X-ray electron spectroscopy (XPS), cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS), chronoamperometry (CA), and lineer sweep voltammetry (LSV). While Pd-50,Ag-50/C exhibits the highest catalytic activity among the bimetallic electrocatalyst, it is observed that Pd70Ag20Ni10/C electrocatalysts have the best performance among the all electrocatalysts. Its maximum current density is about 1.92 times higher than that of Pd/C (0.675 mA cm(-2)). Also, electrochemical impedance spectroscopy (EIS), chronoamperometry (CA) and lineer sweep voltammetry (LSV) results are in a good agreement with CV results in terms of stability and electrocatalytic activity of Pd50Ag50/C and Pd70Ag20Ni10/C. The Pd70Ag20Ni10/C catalyst is believed to be a promising anode catalyst for the direct formic acid fuel cell. (C) 2018 Elsevier Inc. All rights reserved.eninfo:eu-repo/semantics/closedAccessPdAgNiPdagniAlloyElectronic StateFormic Acid ElectrooxidationImpedanceArticle532Q1Q1475730077066WOS:000445322600006