Incorporation of Cu() and its selective reduction to Cu() within confined spaces: efficient active sites for CO adsorption
Cu( i )-containing materials have great potential in various applications such as in CO adsorption; however, development of an efficient and controllable method to produce Cu( i ) sites remains a significant challenge; herein, a two-step double-solvent (DS) strategy is reported for the first time to...
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Published in | Journal of materials chemistry. A, Materials for energy and sustainability Vol. 6; no. 19; pp. 893 - 8939 |
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Main Authors | , , , , , |
Format | Journal Article |
Language | English |
Published |
Cambridge
Royal Society of Chemistry
2018
|
Subjects | |
Online Access | Get full text |
ISSN | 2050-7488 2050-7496 2050-7496 |
DOI | 10.1039/c8ta01805g |
Cover
Summary: | Cu(
i
)-containing materials have great potential in various applications such as in CO adsorption; however, development of an efficient and controllable method to produce Cu(
i
) sites remains a significant challenge; herein, a two-step double-solvent (DS) strategy is reported for the first time to fabricate Cu(
i
) sites in a representative metal-organic framework, MIL-101(Cr); this strategy ensures that both introduction of the Cu(
ii
) precursor and its reduction to Cu(
i
) occur inside the pores and significantly minimizes the aggregation of Cu species. This is difficult to realize through conventional methods used for Cu(
ii
) introduction (wet impregnation) or reduction (liquid-phase reduction). The two-step DS strategy involves selective reduction of Cu(
ii
) to form Cu(
i
) without the formation of any Cu(0). The obtained Cu(
i
)-containing materials exhibit an excellent CO adsorption capacity (up to 2.42 mmol g
−1
) at 298 K and 1 bar, much better than that of the benchmark adsorbents including CuCl/γ-Al
2
O
3
(1.0 mmol g
−1
), CuCl/MCM-41 (0.57 mmol g
−1
), and CuZSM-5 (0.11 mmol g
−1
).
A two-step double-solvent strategy was first used to incorporate Cu(
i
) sites into MIL-101(Cr), which obviously improves the CO adsorption performance. |
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Bibliography: | 10.1039/c8ta01805g Electronic supplementary information (ESI) available. See DOI ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 14 content type line 23 |
ISSN: | 2050-7488 2050-7496 2050-7496 |
DOI: | 10.1039/c8ta01805g |