Journal
NATURE COMMUNICATIONS
Volume 8, Issue -, Pages -Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/s41467-017-01259-z
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Funding
- National Natural Science Foundation of China [21473169, 21673215, 21533007, 21233007, 11404314]
- Innovative Research Groups of the National Natural Science Foundation of China [11621063]
- One Thousand Young Talents Program under the Recruitment Program of Global Experts
- Anhui Provincial Natural Science Foundation [1708085MA06]
- Fundamental Research Funds for the Central Universities [WK2060030017]
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Supported metal clusters containing only a few atoms are of great interest. Progress has been made in synthesis of metal single-atom catalysts. However, precise synthesis of metal dimers on high-surface area support remains a grand challenge. Here, we show that Pt-2 dimers can be fabricated with a bottom-up approach on graphene using atomic layer deposition, through proper nucleation sites creation, Pt-1 single-atom deposition and attaching a secondary Pt atom selectively on the preliminary one. Scanning transmission electron microscopy, x-ray absorption spectroscopy, and theoretical calculations suggest that the Pt-2 dimers are likely in the oxidized form of Pt2Ox. In hydrolytic dehydrogenation of ammonia borane, Pt-2 dimers exhibit a high specific rate of 2800 mol(H2) mol(Pt)(-1) min(-1) at room temperature, similar to 17- and 45-fold higher than graphene supported Pt single atoms and nanoparticles, respectively. These findings open an avenue to bottom-up fabrication of supported atomically precise ultrafine metal clusters for practical applications.
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