Platinum recycling going green via induced surface potential alteration enabling fast and efficient dissolution.

摘要: The recycling of precious metals, for example, platinum, is an essential aspect sustainability the modern industry and energy sectors. However, due to its resistance corrosion, platinum-leaching techniques rely on high reagent consumption hazardous processes, boiling aqua regia; a mixture concentrated nitric hydrochloric acid. Here we demonstrate that complete dissolution metallic platinum can be achieved by induced surface potential alteration, ‘electrode-less’ process utilizing alternatively oxidative reductive gases. This concept exploits so-called transient mechanism, triggered repetitive change in oxidation state, without using any external electric current or electrodes. effective performance non-toxic low-concentrated acid at room temperature strong benefit this approach, potentially rendering industrial catalysts, including but not limited platinum-based systems, more sustainable. Given scarcity cost it important develop sustainable processes recycling. Here, authors report gases repetitively absence current.