期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 137, 期 33, 页码 10484-10487出版社
AMER CHEMICAL SOC
DOI: 10.1021/jacs.5b06485
关键词
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资金
- One Thousand Young Talents Program under Recruitment Program of Global Experts
- NSFC [21473169, 11135008, 51402283]
- Fundamental Research Funds for Central Universities [WK2060030014]
- University of Science and Technology of China
We reported that atomically dispersed Pd on graphene can be fabricated using the atomic layer deposition technique. Aberration-corrected high-angle annular dark-field scanning transmission electron microscopy and X-ray absorption fine structure spectroscopy both confirmed that isolated Pd single atoms dominantly existed on the graphene support. In selective hydrogenation of 1,3-butadiene, the single-atom Pd-1/graphene catalyst showed about 100% butenes selectivity at 95% conversion at a mild reaction condition of about 50 degrees C, which is likely due to the changes of 1,3-butadiene adsorption mode and enhanced steric effect on the isolated Pd atoms. More importantly, excellent durability against deactivation via either aggregation of metal atoms or carbonaceous deposits during a total 100 h of reaction time on stream was achieved. Therefore, the single-atom catalysts may open up more opportunities to optimize the activity, selectivity, and durability in selective hydrogenation reactions.
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