Antisite defect unleashes catalytic potential in high-entropy intermetallics for oxygen reduction reaction
Central South University · Peking University · +1 more institution
Abstract
Developing highly active, low-cost, and durable catalysts for efficient oxygen reduction reactions remain a challenge, hindering the commercial viability of proton exchange membrane fuel cells (PEMFCs). In this study, an ordered PtZnFeCoNiCr high-entropy intermetallic electrocatalyst with Pt antisite point defects (PD-PZFCNC-HEI) is synthesized. The electrocatalyst shows high mass activity of 4.12 A mgPt-1 toward the oxygen reduction reaction (ORR), which is 33 times that of the commercial Pt/C. PEMFC, assembled with PD-PZFCNC-HEI as the cathode (0.05 mgPt cm-2), exhibits a peak power density of 1.9 W cm-2 and a high mass activity of 3.0 A mgPt-1 at 0.9 V. Theoretical calculations combined with in situ X-ray…
Citation impact
- FWCI
- 39.42
- Percentile
- 100%
- References
- 67
Authors
12Topics & keywords
- Catalysis
- Intermetallic
- Oxygen
- Reduction (mathematics)
- Materials science
- Chemistry
- Mathematics
- Metallurgy