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 inJournal of materials chemistry. A, Materials for energy and sustainability Vol. 6; no. 19; pp. 893 - 8939
Main Authors Li, Yu-Xia, Li, Shuai-Shuai, Xue, Ding-Ming, Liu, Xiao-Qin, Jin, Meng-Meng, Sun, Lin-Bing
Format Journal Article
LanguageEnglish
Published Cambridge Royal Society of Chemistry 2018
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ISSN2050-7488
2050-7496
2050-7496
DOI10.1039/c8ta01805g

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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.
Bibliography:10.1039/c8ta01805g
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ISSN:2050-7488
2050-7496
2050-7496
DOI:10.1039/c8ta01805g