Self-assembly of noble metal monolayers on transition metal carbide nanoparticle catalysts | Zendy

Sean T. Hunt | Zendy; Maria Milina | Zendy; Ana C. AlbaRubio | Zendy; Christopher H. Hendon | Zendy; James A. Dumesic | Zendy; Yuriy RománLeshkov | Zendy

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Self-assembly of noble metal monolayers on transition metal carbide nanoparticle catalysts

Author(s) -

Sean T. Hunt,

Maria Milina,

Ana C. AlbaRubio,

Christopher H. Hendon,

James A. Dumesic,

Yuriy RománLeshkov

Publication year - 2016

Publication title -

science

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 12.556

H-Index - 1186

eISSN - 1095-9203

pISSN - 0036-8075

DOI - 10.1126/science.aad8471

Subject(s) - monolayer , noble metal , transition metal , carbide , catalysis , nanoparticle , materials science , metal , nanotechnology , chemical engineering , chemistry , metallurgy , organic chemistry , engineering

We demonstrated the self-assembly of transition metal carbide nanoparticles coated with atomically thin noble metal monolayers by carburizing mixtures of noble metal salts and transition metal oxides encapsulated in removable silica templates. This approach allows for control of the final core-shell architecture, including particle size, monolayer coverage, and heterometallic composition. Carbon-supported Ti(0.1)W(0.9)C nanoparticles coated with Pt or bimetallic PtRu monolayers exhibited enhanced resistance to sintering and CO poisoning, achieving an order of magnitude increase in specific activity over commercial catalysts for methanol electrooxidation after 10,000 cycles. These core-shell materials provide a new direction to reduce the loading, enhance the activity, and increase the stability of noble metal catalysts.

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