RSC Advances
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of similar Cu defects. Surprisingly, liquid-assisted grinding
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(LAG) appears to be the strategy resulting in the material with
2948.
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synthetic yields. Those conclusions were drawn through thor-
ough characterization of the materials by vibrational spectros- 12 C. Wang, B. An and W. Lin, ACS Catal., 2019, 9, 130–146.
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117, 8129–8176.
3
2
¨
by HKUST-1 seems to be the most efficient when using mate-
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2
increases affinity of the materials for NH . However, even in the
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B. Lebeau and T. Jean Daou, Molecules, 2018, 23, 1–13.
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single crystals show the highest gravimetric carbon dioxide
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uptake, evidencing an inuence of the texture and size of the 16 Z. Heidarinejad, M. H. Dehghani, M. Heidari, G. Javedan,
MOF particles on its performance. Finally, we showed that the
I. Ali and M. Sillanp ¨a ¨a , Environ. Chem. Lett., 2020, 18, 393–
presence of –COOH defect sites in HKUST-1, despite increasing
415.
the thermal stability of the material, strongly poisons the 17 N. Mohamad Nor, L. C. Lau, K. T. Lee and A. R. Mohamed, J.
catalytic activity of this MOF towards the cyclopropanation of Environ. Chem. Eng., 2013, 1, 658–666.
styrene with ethyl diazoacetate. The presence of high amounts 18 B. Fidalgo and J. A. Menendez, Cuihua Xuebao, 2011, 32, 207–
´
´
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of Cu seems to partly counteract this poisoning effect. However,
the absence of carboxylic acid sites in the LAG-obtained mate- 19 A. Jain, R. Balasubramanian and M. P. Srinivasan, Chem.
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Cu , indicating that the pristine Cu sites are the most catalyt-
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2
2 M. Ahmad, A. U. Rajapaksha, J. E. Lim, M. Zhang, N. Bolan,
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Conflicts of interest
There are no conicts to declare.
2
3 M. Inagaki, F. Kang, M. Toyoda and H. Konno, Advanced
Materials Science and Engineering of Carbon, Elsevier, 1st
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Acknowledgements
The authors acknowledge nancial support through the FRIA 24 H. Marsh and F. R. Reinoso, Activated Carbon, Elsevier, 1st
funding of F.R.S./FNRS for T. S. We thank Dr François Devred
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for his help with NH –TPD measurements, Dr Pierre Eloy for 25 M. Dincǎ and J. R. Long, Angew. Chem., Int. Ed., 2008, 47,
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