Kim, Su-jin Lee, Seung-Cheol Lee, Chongmok Kim, Myung Hwa Lee, Youngmi 2024-01-19T22:33:00Z 2024-01-19T22:33:00Z 2021-09-03 2018-06 2211-2855 https://pubs.kist.re.kr/handle/201004/121297 Oxygen reduction reaction (ORR) is of great interest in various areas, including energy conversion. This paper presents the simple synthesis and characterization of one-dimensional silver halides nanowires (AgClNW and AgBrNW) as an electrocatalyst for ORR in alkaline media, as well as an investigation of the ORR pathway at AgCl. AgClNW and AgBrNW were prepared via a galvanic replacement reaction (GRR) between silver nanowires (AgNW) and a halide precursor. AgClNW exhibited excellent ORR catalytic activity that was comparable to or better than that for commercial Pt (20 wt% Pt loading on Vulcan carbon), demonstrating potential to replace Pt-based catalysts. A scanning electrochemical microscopy (SECM) analysis supports the existence of an associative ORR pathway at AgCl, and first-principles density functional theory (DFT) calculations suggest that the high ORR activity of AgCl is possibly attributed to the up-shifted Ag d-band center energy in AgCl as well as the assistance of adsorbed water molecules. English ELSEVIER SCIENCE BV SCANNING ELECTROCHEMICAL MICROSCOPY FUEL-CELLS CATALYSTS PLATINUM MEDIA NANOSTRUCTURES NANOPARTICLES Evolution of silver to a better electrocatalyst: Water-assisted oxygen reduction reaction at silver chloride nanowires in alkaline solution Article 10.1016/j.nanoen.2018.03.041 1 NANO ENERGY, v.48, pp.134 - 143 NANO ENERGY 48 134 143 scie scopus 000432604600016 2-s2.0-85044161286 Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Applied Chemistry Science & Technology - Other Topics Materials Science Physics Article SCANNING ELECTROCHEMICAL MICROSCOPY FUEL-CELLS CATALYSTS PLATINUM MEDIA NANOSTRUCTURES NANOPARTICLES Oxygen reduction reaction Electrocatalysis Silver halide Nanowires DFT calculation