AI Article Synopsis
- Most corrosion issues in electrocatalysis arise from the degradation of catalysts during reactions, particularly in core-shell structures during the oxygen reduction reaction (ORR).
- The authors used an in-situ method involving liquid cell transmission electron microscopy (LC-TEM) to design a modified nanocube (MNC) with protective layers, making it more resistant to corrosion.
- In practical tests, the MNC exhibited superior stability, with minimal loss in activity after an extensive durability test, showcasing how in-situ studies can inform the development of better materials for real-world applications.
Article Abstract
Most degradations in electrocatalysis are caused by corrosion in operation, for example the corrosion of the core in a core-shell electrocatalyst during the oxygen reduction reaction (ORR). Herein, according to the in-situ study on nanoscale corrosion kinetics via liquid cell transmission electron microscopy (LC-TEM) in the authors' previous work, they sequentially designed an optimized nanocube with the protection of more layers on the corners by adjusting the Pt atom distribution on corners and terraces. This modified nanocube (MNC) is much more corrosion resistant in the in-situ observation. Furthermore, in the practical electrochemical stability testing, the MNC catalyst also showed the best stability performance with the 0.37% and 9.01% loss in specific and mass activity after 30 000 cycles accelerated durability test (ADT). This work also demonstrates that how an in-situ study can guide the design of desired materials with improved properties and build a bridge between in-situ study and practical application.
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| http://dx.doi.org/10.1002/adma.202101511 | DOI Listing |
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