AI Article Synopsis
- Researchers analyzed the electrocatalytic properties of mitrofanovite (PtTe) using tests and theoretical models, revealing its strong potential as an electrocatalyst for energy applications.
- Compared to pure platinum, PtTe is 47% cheaper and more resistant to CO poisoning, making it a promising alternative.
- The stability and efficiency of PtTe were confirmed through its low overpotential and Tafel slope in hydrogen evolution reactions, indicating its durability for long-term use.
Article Abstract
By means of electrocatalytic tests, surface-science techniques and density functional theory, we unveil the physicochemical mechanisms ruling the electrocatalytic activity of recently discovered mitrofanovite (PtTe) mineral. Mitrofanovite represents a very promising electrocatalyst candidate for energy-related applications, with a reduction of costs by 47% compared to pure Pt and superior robustness to CO poisoning. We show that PtTe is a weak topological metal with the invariant, exhibiting electrical conductivity (∼4 × 10 S/m) comparable with pure Pt. In hydrogen evolution reaction (HER), the electrode based on bulk PtTe shows a very small overpotential of 46 mV at 10 mA cm and a Tafel slope of 36-49 mV dec associated with the Volmer-Heyrovsky mechanism. The outstanding ambient stability of PtTe also provides durability of the electrode and long-term stability of its efficient catalytic performances.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8436201 | PMC |
| http://dx.doi.org/10.1021/acs.jpclett.1c01261 | DOI Listing |
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