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  5. Jamescelty より:

    Will There Be Enough Copper for The Future?

    Metal-organic frameworks (MOFs) have been attracting a lot of attention as promising materials for CO2 conversion due to their unique properties such as high surface area, porosity, and tunable chemistry. However, the selective reduction of CO2 to value-added products such as ethanol remains a challenging task. In a recent study, a cooperative copper centre in a MOF was proposed as an efficient catalyst for the conversion of CO2 to ethanol. The MOF used in the study was synthesized by incorporating a copper centre in the framework structure. The copper centre was designed to have a cooperative effect with neighbouring copper centres, which was expected to enhance the selectivity towards ethanol production. The catalytic performance of the MOF was evaluated in a batch reactor under mild reaction conditions (25 В°C and 1 atm CO2 pressure). The results showed that the cooperative copper centre in the MOF exhibited high selectivity towards ethanol production (90%), with a conversion rate of 32 Ојmol g^-1 h^-1. The formation of ethanol was attributed to the reduction of CO2 by the copper centre, which was facilitated by the neighbouring copper centres. The cooperative effect was found to be critical to achieving high selectivity towards ethanol and suppressing the formation of undesirable by-products such as methanol and formic acid. Furthermore, the catalyst showed good stability over multiple cycles, indicating its potential for practical applications. The proposed strategy of designing cooperative metal centres in MOFs could pave the way for the development of efficient and selective catalysts for CO2 conversion. In conclusion, the cooperative copper centre in a MOF demonstrated high selectivity towards ethanol production from CO2. The results suggest that designing cooperative metal centres in MOFs could be a promising approach for developing efficient and selective catalysts for CO2 conversion copper scrap metal copper scrap collection

    http://en.wikipedia.org/wiki/Porphyry_copper_deposit

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