CAJ | 학술논문

中心金属离子在非贵金属C-N复合物对氧还原反应（ORR）的电催化活性方面有重要作用。通过将含有多壁碳纳米管（MWCNTs）、聚苯胺与过渡金属Fe和Co的前驱体在N2气氛下于900℃下加热，得到了不同金属比例的C-N催化剂。采用SEM、XRD等对催化剂的结构进行了表征。利用电化学伏安技术，研究了催化剂对ORR的电催化活性及其稳定性。结果表明，当Fe与Co质量比为6：1时催化剂的催化活性最好，在酸性溶液中ORR起始电位达到0.52 V(vs SCE)，电流密度为12.5 mA·mg-1@-0.3 V (vs SCE)；在碱性溶液中ORR 起始电位为-0.09 V(vs SCE），电流密度为7.8 mA·mg-1@-0.8 V (vs SCE)。结果表明，催化剂中Fe与Co的质量比对催化剂的活性有很大影响。
중심금속리자재비귀금속C-N복합물대양환원반응（ORR）적전최화활성방면유중요작용。통과장함유다벽탄납미관（MWCNTs）、취분알여과도금속Fe화Co적전구체재N2기분하우900℃하가열，득도료불동금속비례적C-N최화제。채용SEM、XRD등대최화제적결구진행료표정。이용전화학복안기술，연구료최화제대ORR적전최화활성급기은정성。결과표명，당Fe여Co질량비위6：1시최화제적최화활성최호，재산성용액중ORR기시전위체도0.52 V(vs SCE)，전류밀도위12.5 mA·mg-1@-0.3 V (vs SCE)；재감성용액중ORR 기시전위위-0.09 V(vs SCE），전류밀도위7.8 mA·mg-1@-0.8 V (vs SCE)。결과표명，최화제중Fe여Co적질량비대최화제적활성유흔대영향。
Transition metal has an important effect on the electrocatalytic activity of non-noble metal catalysts for oxygen reduction reaction (ORR). In this work, the precursor containing MWCNTs, polyaniline, Fe and Co was firstly synthesized, and then the precursor was heated at 900℃ under N2 to obtain the C-N catalysts with different Fe/Co mass ratios. The structure of the catalysts was investigated with SEM and X-ray diffraction. ORR activity of the catalysts in acidic and alkaline media was tested with voltammetry. The prepared catalyst with Fe/Co mass ratio of 6:1 presents the highest electrocatalytic activity for ORR. ORR current density at 2000 r·min-1 was 12.5 mA·mg-1@-0.3 V(vs SCE) in acidic solution and 7.8 mA·mg-1@-0.8 V(vs SCE) in alkaline solution, and onset potential of ORR was 0.52 V(vs SCE) in acidic solution and-0.09 V(vs SCE) in alkaline solution. Fe/Co mass ratio played a great role in the electrocatalytic activity of these non-noble metal catalysts for ORR.