Journal
CHEMCATCHEM
Volume 10, Issue 21, Pages 4924-4930Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cctc.201801192
Keywords
Ru Nanoclusters; Hierarchically Porous Carbon; Dehydrogenation of Ammonia Borane; Nitrogen-Enriched
Categories
Funding
- National Natural Science Foundation of China [21501095]
- Priority Academic Program Development of Jiangsu Higher Education Institutions, National and Local Joint Engineering Research Center of Biomedical Functional Materials
- Jiangsu Specially Appointed Professor Plan
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The development of the highly active nanocatalysts for effective hydrogen (H-2) production is of great significance for its practical applications in fuel cells. Herein, we reported a facile and scale-up synthetic methodology to grow in situ the remarkably active nanocatalysts of ultrasmall Ru nanoclusters on nitrogen (N)-enriched hierarchically macroporous-mesoporous carbon supports (Ru@hPCN). The resultant Ru@hPCN combines structural and chemical merits of well-dispersed 0.7-nm Ru nanoclusters, N-enriched functional surface and 3D hierarchically porous framework, all of which synergistically boost the catalytic performance toward the hydrolysis of ammonia-borane (AB). An unprecedented activity with a turnover frequency of 1850 min(-1) was achieved for the Ru@hPCN, which was 6.0 folds over that of commercialized Ru/C catalyst. Mechanism studies showed that the remarkably enhanced activity can be ascribed to the easier dissociation of electropositive H delta+ from H2O and the breakage of the B-N bonds as well as favorable mass transport in the Ru@hPCN during AB hydrolysis.
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