Oxygen Reduction at Silver and Silver-Based Alloy Electrodes

Abstract

Current‐voltage characteristics for the reduction of oxygen at silver and alloy electrodes formed with silver and elements having oxides of low electron affinity were studied in pre‐electrolyzed and in ordinary 15% KOH solution. In impure solutions or at the alloy electrodes straight Tafel lines were obtained, but with pure silver in pure solutions no such behavior was found. This is taken to indicate a dynamic surface of varying catalytic activity. With silver‐magnesium oxide surfaces, a potential about 100 mv higher than with pure silver was obtained at open circuit as well as under current drain. The possible mechanistic significance of the results is discussed in terms of the physical properties of the material and the behavior of the constituents in gas‐solid reactions.

Electrocatalytic Activity of Metals and Alloys Electrodeposited on Foreign Substrates: I . Some Aspects of Oxygen Reduction on Electrodeposited Silver Films on Pyrolytic Graphite

“…Such wide variation in the electrocatalytic activity of silver cathodes as a function of surface pretreatments is consistent with previously reported work (7)(8)(9)(10)(11)(12). Such wide variation in the electrocatalytic activity of silver cathodes as a function of surface pretreatments is consistent with previously reported work (7)(8)(9)(10)(11)(12).…”

Pt-free silver nanoalloy electrocatalysts for oxygen reduction reaction in alkaline media

“…Alloying of Mg with silver has been reported to improve the ORR activity. 173,174 Porous electrodes of Ag-Mg alloys in atomic ratios of 1:1, 1:3 and 3:1 were synthesized. Alloy with Ag:Mg ratio of 3:1 showed the highest current density i.e.…”

Ag-Cu nanoalloyed film as a high-performance cathode electrocatalytic material for zinc-air battery

“…Although Pt-based film catalyst has already obtained progress via PLD method [ 15 ], it is still expected to further decrease the cost of ORR catalyst. Therefore, the 3d transition metal oxides [ 16 - 19 ], silver [ 20 - 27 ], and its related alloy with transition metals, such as Ag-Co and Ag-Mn [ 28 - 31 ], which consume less cost than Pt were investigated extensively in an alkaline environment. Beyond that, Ag-Cu alloyed materials also might be suitable electrocatalyst for reasons.…”