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Characterization of the prepared samples was done by transmission electron microscopy (TEM), Fourier-transform infrared spectroscopy (FTIR), Raman spectroscopy, X-ray diffraction analysis (XRD), and scanning electron microscopy with integrated energy-dispersive X-ray spectroscopy (SEM-EDS). CuAg\/rGO and CoAg\/rGO nanoparticles diameter ranged from 0.4 to 9.2 nm. The Ag loading was ca. 40 wt.% for both electrocatalysts, with that for Cu and Co being 35 and 17 wt.%, respectively. CoAg\/rGO electrocatalyst showed a Tafel slope of 109 mV dec\u22121, significantly lower than that for CuAg\/rGO (184 mV dec\u22121), suggesting faster ORR kinetics. Additionally, a higher diffusion current density was obtained for CoAg\/rGO (\u22122.63 mA cm\u22122) than for CuAg\/rGO (\u22121.74 mA cm\u22122). The average value of the number of electrons transferred during ORR was 2.8 for CuAg\/rGO and 3.3 for CoAg\/rGO electrocatalyst, further confirming the higher ORR activity of the latter. On the other hand, CuAg\/rGO showed higher peak current densities (\u22123.96 mA cm\u22122) for HPRR compared to those recorded for CoAg\/rGO electrocatalyst (\u22121.96 mA cm\u22122).<\/jats:p>","DOI":"10.3390\/nano12152657","type":"journal-article","created":{"date-parts":[[2022,8,3]],"date-time":"2022-08-03T00:15:26Z","timestamp":1659485726000},"page":"2657","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":25,"title":["Facile Synthesis of Low-Cost Copper-Silver and Cobalt-Silver Alloy Nanoparticles on Reduced Graphene Oxide as Efficient Electrocatalysts for Oxygen Reduction Reaction in Alkaline Media"],"prefix":"10.3390","volume":"12","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-2266-6738","authenticated-orcid":false,"given":"Jadranka","family":"Miliki\u0107","sequence":"first","affiliation":[{"name":"University of Belgrade, Faculty of Physical Chemistry, Studentski trg 12-16, 11158 Belgrade, Serbia"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1861-1128","authenticated-orcid":false,"given":"Sara","family":"Kne\u017eevi\u0107","sequence":"additional","affiliation":[{"name":"Faculty of Chemistry, University of Belgrade, Studentski trg 12-16, 11000 Belgrade, Serbia"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6589-6296","authenticated-orcid":false,"given":"Stevan","family":"Stojadinovi\u0107","sequence":"additional","affiliation":[{"name":"University of Belgrade, Faculty of Physics, Studentski trg 12-16, 11000 Belgrade, Serbia"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4366-3256","authenticated-orcid":false,"given":"Mabkhoot","family":"Alsaiari","sequence":"additional","affiliation":[{"name":"Promising Centre for Sensors and Electronic Devices (PCSED), Advanced Materials and Nano-Research Centre, Najran University, Najran 11001, Saudi Arabia"},{"name":"Department of Chemistry, Faculty of Science and Arts at Sharurah, Najran University, Najran 11001, Saudi Arabia"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7776-7099","authenticated-orcid":false,"given":"Farid A.","family":"Harraz","sequence":"additional","affiliation":[{"name":"Promising Centre for Sensors and Electronic Devices (PCSED), Advanced Materials and Nano-Research Centre, Najran University, Najran 11001, Saudi Arabia"},{"name":"Nanomaterials and Nanotechnology Department, Central Metallurgical Research and Development Institute (CMRDI), Helwan 11421, Cairo, Egypt"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7920-2638","authenticated-orcid":false,"given":"Diogo M. F.","family":"Santos","sequence":"additional","affiliation":[{"name":"Center of Physics and Engineering of Advanced Materials, Laboratory for Physics of Materials and Emerging Technologies, Chemical Engineering Department, Instituto Superior T\u00e9cnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0203-4012","authenticated-orcid":false,"given":"Biljana","family":"\u0160ljuki\u0107","sequence":"additional","affiliation":[{"name":"University of Belgrade, Faculty of Physical Chemistry, Studentski trg 12-16, 11158 Belgrade, Serbia"},{"name":"Center of Physics and Engineering of Advanced Materials, Laboratory for Physics of Materials and Emerging Technologies, Chemical Engineering Department, Instituto Superior T\u00e9cnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal"}]}],"member":"1968","published-online":{"date-parts":[[2022,8,2]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"123","DOI":"10.1016\/j.jcat.2021.04.018","article-title":"New insights into the hydrogen peroxide reduction reaction and its comparison with the oxygen reduction reaction in alkaline media on well-defined platinum surfaces","volume":"398","author":"Rizo","year":"2021","journal-title":"J. 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