And cu n 1 o 2 sa cn displays only one intensity maximum at 4.6 Å −1, which is between the cu o (4.9 Å −1) and cu n (4.2 Å −1) coordination in cuo and cupc (supplementary fig. 10). in. Electrocatalytic co2 reduction (co2rr) to alcohols offers a promising strategy for converting waste co2 into valuable fuels chemicals but usually requires large overpotentials. herein, we report a catalyst comprising unique oxygen bridged cu binuclear sites (cuocu n4) with a cu···cu distance of 3.0–3.1 Å and concomitant conventional cu–n4 mononuclear sites on hierarchical nitrogen.
11:30am 10 pm. 11:30am 10 pm. closed. 718 som ctr rd, mayfield, oh 44143. 440.646.0429. have a question? contact us today! italian american casual dining featuring pizza and pasta along with many classic and orginal recipes. Recently, the research group of professor zheng hu at the key laboratory of mesoscopic chemistry of moe took cu 2 o as the precursor and hncnc as the support, and successfully constructed the highly dispersive cu catalyst, which is composed of the unique cuocu n 4 binuclear sites with a cu···cu distance of 3.0−3.1 Å and the conventional. Synthetic route. as the ligand of 1,3,5 benzenetricarboxylic acid (1,3,5 btc) could be coordinated with many metal ions like cu 2 , zn 2 and ce 3 , we tried to synthesize the cuznce mof by one. The catalyst with cu n 4 sites (cu n 4 c 1100) exhibits outstanding activity and selectivity for co 2 to co conversion compared to its cu n 3 counterpart (cu n 3 c 800), achieving high co faradaic efficiency (fe co) of over 90% from −0.6 to −1.1 v vs. rhe and reaching a maximum fe co of 98% at −0.9 v vs. rhe.
Synthetic route. as the ligand of 1,3,5 benzenetricarboxylic acid (1,3,5 btc) could be coordinated with many metal ions like cu 2 , zn 2 and ce 3 , we tried to synthesize the cuznce mof by one. The catalyst with cu n 4 sites (cu n 4 c 1100) exhibits outstanding activity and selectivity for co 2 to co conversion compared to its cu n 3 counterpart (cu n 3 c 800), achieving high co faradaic efficiency (fe co) of over 90% from −0.6 to −1.1 v vs. rhe and reaching a maximum fe co of 98% at −0.9 v vs. rhe. The catalyst exhibits a state of the art low overpotential of 0.19 v (versus reversible hydrogen electrode) for ethanol and an outstanding ethanol faradaic efficiency of 56.3% at an ultralow potential of 0.30 v, with high stable cu active site structures during the co 2 rr as confirmed by operando x ray adsorption fine structure characterization. Cu based materials are seldom reported as oxygen evolution reaction (oer) electrocatalysts due to their inherent electron orbital configuration, which makes them difficult to adsorb oxygen intermediates during oer. reasonably engineering the hierarchical architectures and the electronic structures can improve the performance of cu based oer catalysts, such as constructing multilevel morphology.
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