Strong Metal-Support Interaction Facilitated Multicomponent Alloy Formation on Metal Oxide Support
Jianyu Han1,2, Jingyi Yang1, Zhixin Zhang1
1State Key Laboratory of Catalysis, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116000, P. R. China.
Journal of the American Chemical Society
|October 9, 2023
Summary
A novel synthesis strategy uses strong metal-support interaction (SMSI) to create multicomponent alloy (MA) catalysts at lower temperatures. This method enhances catalytic activity and stability for methane combustion without damaging support structures.
Area of Science:
- Materials Science
- Catalysis
- Nanotechnology
Background:
- Multicomponent alloys (MA) offer numerous active sites via entropy stabilization, ideal for high-performance catalysts.
- Conventional MA synthesis requires harsh conditions, leading to support degradation and reduced catalyst synergy.
- Developing low-temperature synthesis methods for MA catalysts without compromising support integrity is crucial.
Purpose of the Study:
- To propose and validate a novel synthesis strategy for multicomponent alloy catalysts using strong metal-support interaction (SMSI).
- To demonstrate low-temperature synthesis (400-600 °C) of MA catalysts on reducible oxide supports.
- To investigate the role of SMSI in facilitating MA formation and enhancing catalytic performance.
Main Methods:
- Utilized SMSI to create oxygen vacancy tunnels for metal atom transport during MA formation.
- Synthesized Platinum-Palladium-Cobalt-Iron (PtPdCoFe) MA on anatase TiO2 under controlled low reduction temperatures.
- Evaluated catalytic activity and stability for methane combustion.
Main Results:
- Successfully synthesized PtPdCoFe MA on TiO2 at 400-600 °C, facilitated by SMSI.
- The synthesized MA catalyst exhibited good activity and stability for methane combustion.
- The SMSI-mediated strategy proved versatile across different supports and alloy compositions.
Conclusions:
- SMSI is a key factor in enabling low-temperature synthesis of MA catalysts on reducible oxides.
- This holistic design strategy avoids support deactivation and enhances MA catalyst performance.
- The findings offer new insights into MA formation mechanisms and provide a universal synthesis approach.
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