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Here, we discuss the key features of electrocatalysis with mitrofanovite (Pt3Te4), a recently discovered mineral with superb performances in hydrogen evolution reaction. Mitrofanovite is a layered topological metal with spin-polarized topological surface states with potential applications for spintronics. However, mitrofanovite is also an exceptional platform for electrocatalysis, with costs of the electrodes suppressed by 47% owing to the partial replacement of Pt with Te. Remarkably, the Tafel slope in nanostructured mitrofanovite is just 33 mV/dec, while reduced mitrofanovite has the same Tafel slope (36 mV/dec) as state-of-the-art electrodes of pure Pt. Mitrofanovite also affords surface stability and robustness to CO poisoning. Accordingly, these findings pave the way for the advent of mitrofanovite for large-scale hydrogen production.
Publication date: 
6 Feb 2022

Gianluca D’olimpio, Lixue Zhang, Chia-Nung Kuo, Daniel Farias, Luca Ottaviano, Chin Shan Lue, Jun Fujii, Ivana Vobornik, Amit Agarwal, Piero Torelli, Danil W Boukhvalov, Antonio Politano

Biblio References: 
Volume: 12 Issue: 3 Pages: 558