Engineering the electronic and strained interface for high activity of PdMcore@Ptmonolayer electrocatalysts for oxygen reduction reaction
- Guangdong Univ. of Technology, Guangzhou (China)
- Eindhoven Univ. of Technology (Netherlands)
- Univ. of Adelaide (Australia)
- SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Synchrotron Radiation Lightsource (SSRL)
- Tsinghua Univ., Beijing (China)
- Guangdong Univ. of Technology, Guangzhou (China); South China Univ. of Technology, Guangzhou (China)
- Dongguan Univ. of Technology (China)
- Hainan Univ., Haikou (China)
Alloyed nanoparticles with core-shell structures provide a favorable model to modulate interfacial interaction and surface structures at the atomic level, which is important for designing electrocatalysts with high activity and durability. Herein, core-shell structured Pd3M@Pt/C nanoparticles with binary PdM alloy cores (M = Fe, Ni, and Co) and a monolayer Pt shell were successfully synthesized with diverse interfaces. Among these, Pd3Fe@Pt/C exhibited the best oxygen reduction reaction catalytic performance, roughly 5.4 times more than that of the commercial Pt/C catalyst used as reference. The significantly enhanced activity is attributed to the combined effects of strain engineering, interfacial electron transfer, and improved Pt utilization. Density functional theory simulations and extended X-ray absorption fine structure analysis revealed that engineering the alloy core with moderate lattice mismatch and alloy composition (Pd3Fe) optimizes the surface oxygen adsorption energy, thereby rendering excellent electrocatalytic activity. Finally, future researches may use this study as a guide on the construction of highly effective core-shell electrocatalysts for various energy conversions and other applications.
- Research Organization:
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC); Natural Science Foundation of Hainan Province; National Natural Science Foundation of China (NSFC); Natural Science Foundation of Guangdong Province
- Grant/Contract Number:
- AC02-76SF00515; 2019RC007; 21606050; U1801257; 21905045; 21905056; 21805104; 2018A0303130239; 2018A0303130223; KYQD(ZR)1908; 201806010039
- OSTI ID:
- 1646791
- Journal Information:
- Science Bulletin, Vol. 65, Issue 16; ISSN 2095-9273
- Publisher:
- Elsevier; Science China PressCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
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