-A A +A
The sluggish kinetics associated with the oxygen evolution reaction (OER) limits the sustainability of fuel production and chemical synthesis. Developing catalysts based on Earth abundant elements with a reasonable strategy could solve the challenge. Here, we present a heterostructure built from CrOx and CuS whose interface gives rise to the advent of new functionalities in catalytic activity. Using X-ray photoelectron and absorption spectroscopies, we identified the multiple oxidation states and low coordination number of Cr metal in CrOx-CuS heterostructure. Benefitting from these features, CrOx-CuS generates oxygen gas through water splitting with a low over potential of 190 mV vs RHE at a current density of 10 mA cm−2. The catalyst shows no evident deactivation after a 36-hours operation in alkaline medium. The high catalytic activity, inspired by first principles calculations, and long-time durability make it …
Publication date: 
1 Feb 2023

Tofik Ahmed Shifa, Alessandro Gradone, Khabib Yusupov, Kassa Belay Ibrahim, Matteo Jugovac, Polina Makarovna Sheverdyaeva, Johanna Rosen, Vittorio Morandi, Paolo Moras, Alberto Vomiero

Biblio References: 
Volume: 453 Pages: 139781
Chemical Engineering Journal