Back to Search
Start Over
Bilayer MXene‐Derived Carbon‐Encapsulated Palladium Nanocatalysts: Engineering Robust Electronic and Chemical Interfaces for Oxygen Reduction and Zinc–Air Batteries.
- Source :
-
Advanced Energy Materials . 1/20/2023, Vol. 13 Issue 3, p1-12. 12p. - Publication Year :
- 2023
-
Abstract
- Designing highly active and durable electrocatalysts remain an ongoing challenge in the oxygen reduction reaction (ORR). Here, the reductive IL/Ti3C2Tx(FA) is produced in a water‐free mixture of formic acid (FA), ionic liquid (IL) and LiF, subsequently, the simultaneous reduction encapsulation trap the Pd nanocatalysts and IL within bilayer carbide‐derived carbon (CDC) to obtain Pd@IL/CDC(FA) with high metal loading up to 69.7%. Thereby, the featured active phases in Pd@IL/CDC(FA) impart potent chemical nanoconfinement to defend metals from dissolution and aggregation, boost mass and electron transfer, and mediate oxidation states and adsorption/desorption of metal Pd in the ORR. Instead of deactivation and Ostwald ripening, the catalytic performances of Pd@IL/CDC(FA) are gradually enhanced in an accelerated durability test up to 20 000 cycles. In a Zn–air battery, the Pd@IL/CDC(FA) cathode gives a specific capacity of 812.6 mAh gZn−1 and a voltage loss of only 41 mV in galvanostatic discharge for 1000 h. The work opens new venues in controllably preparing high activity and durable electrocatalysts from in‐situ generated CDCs. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 16146832
- Volume :
- 13
- Issue :
- 3
- Database :
- Academic Search Index
- Journal :
- Advanced Energy Materials
- Publication Type :
- Academic Journal
- Accession number :
- 161471714
- Full Text :
- https://doi.org/10.1002/aenm.202202856