니켈 화합물을 이용한 이산화탄소의 전기화학적 전환 = Electrocatalytic Conversion of Carbon Dioxide by Ni Complexes

다국어 초록 (Multilingual Abstract)

In this study, we investigated the electrocatalytic activities of CO2 conversion by using synthesized various Nickel complexes. The conversion of CO2 to CO by [Ni(cyclam)]
-polyallylamine (PALA) with more than 90 % occurred with considerably lower voltages which is -0.78 V vs. Ag/AgCl. The current efficiency of CO2 to CO was at -0.85 V with current efficiency of 70~80 % for NiL1(bpy)(py)]-PALA (L1=4-(1-methyl-4-pyridinium-iodide)), at -1.0 V with current efficiency of 60~70 % for [N-{propylviologen-2-
iminomethyl}pyridyl-aqua-nikel(II)(cyclam)] perclorate at -0.85 V with current efficiency of 50~60 % for bis[(N,N'-bis{((pyridine-4-yl)methylene)ethane-1,2-diimino}-(4-(1-methyl-4-pyridinium-iodide)pyridyl)-2,2'-bipyridyl-nikel(II)]. Bis[(N,N'-bis{((pyridine-2-yl)methylene)ethane-1,2-diimino}-2,2‘-bipyridyl-nikel(II)] perchlorate showed the conversion of CO2 to CO with 50~60 % in addition to formate with 6 %.

국문 초록 (Abstract)

다양한 니켈 화합물을 합성하여 이산화탄소 전환의 전기화학적 촉매활성을 확인하였다. [Ni(cyclam)]-polyallylamine (PALA)은 이산화탄소의 전환 과전압을 낮추어 -0.78 V vs. Ag/AgCl에서 일산화탄소로의 전환이 가능했고, 90% 이상의 전류효율을 보여주었다. [NiL1(bpy)(py)]-PALA (L1=4-(1-methyl-4-pyridinium iodide))은 -0.85 V에서 70~80 %, [N-{propylviologen-2-iminomethyl}pyridyl-aqua-nikel(II)(cyclam)] perchlorate는 -1.0 V에서 60~70 %, bis[(N,N'-bis{((pyridine-4-yl)methylene)ethane-1,2-diimino}-(4-(1-methyl-4-pyridinium-iodide)pyridyl)-2,2'-bipyridyl-nikel(II)] perchlorate는 -0.85 V에서 50~60%의 전류효율로 일산화탄소로 전환시킬 수 있었다. Bis[(N,N'-bis{((pyridine-2-yl)methylene)ethane-1,2-diimino}-2,2‘-bipyridyl-nikel(II)] perchlorate의 경우에는 50~60 %의 전류효율로 일산화탄
소로 전환시킬 뿐 아니라 약 6 %의 전류효율로 포름산도 생성시킴을 확인하였다.