Pinning effect of lattice Pb suppressing lattice oxygen reactivity of Pb-RuO₂ enables stable industrial-level electrolysis.

ABSTRACT: Ruthenium (Ru) is widely recognized as a low-cost alternative to iridium as anode electrocatalyst in proton-exchange membrane water electrolyzers (PEMWE). However, the reported Ru-based catalysts usually only operate within tens of hours in PEMWE because of their intrinsically high reactivity of lattice oxygen that leads to irrepressible Ru leaching and structural collapse. Herein, we report a design concept by employing large-sized and acid-resistant lattice lead (Pb) as a second element to induce a pinning effect for effectively narrowing the moving channels of oxygen atoms, thereby lowering the reactivity of lattice oxygen in Ru oxides. The Pb-RuO₂ catalyst presents a low overpotential of 188 ± 2 mV at 10 mA cm^-2 and can sustain for over 1100 h in an acid medium wi

SUBMITTER: Zhou C 

PROVIDER: S-EPMC11558000 | biostudies-literature | 2024 Nov

REPOSITORIES: biostudies-literature