TY  - JOUR
AU  - Hodnik, Nejc
AU  - Baldizzone, Claudio
AU  - Polymeros, George
AU  - Geiger, Simon
AU  - Grote, Jan-Philipp
AU  - Cherevko, Serhiy
AU  - Mingers, Andrea
AU  - Zeradjanin, Aleksandar
AU  - Mayrhofer, Karl
TI  - Platinum recycling going green via induced surface potential alteration enabling fast and efficient dissolution
JO  - Nature Communications
VL  - 7
SN  - 2041-1723
CY  - London
PB  - Nature Publishing Group
M1  - FZJ-2016-05704
SP  - 13164 -
PY  - 2016
AB  - The recycling of precious metals, for example, platinum, is an essential aspect of sustainability for the modern industry and energy sectors. However, due to its resistance to corrosion, platinum-leaching techniques rely on high reagent consumption and hazardous processes, for example, boiling aqua regia; a mixture of concentrated nitric and hydrochloric acid. Here we demonstrate that complete dissolution of metallic platinum can be achieved by induced surface potential alteration, an ‘electrode-less’ process utilizing alternatively oxidative and reductive gases. This concept for platinum recycling exploits the so-called transient dissolution mechanism, triggered by a repetitive change in platinum surface oxidation state, without using any external electric current or electrodes. The effective performance in non-toxic low-concentrated acid and at room temperature is a strong benefit of this approach, potentially rendering recycling of industrial catalysts, including but not limited to platinum-based systems, more sustainable.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000385842600001
C6  - pmid:27767178
DO  - DOI:10.1038/ncomms13164
UR  - https://juser.fz-juelich.de/record/820373
ER  -