One-step synthesis of dual-transition metal substitution on ionic liquid based N-doped mesoporous carbon for oxygen reduction reaction

서지정보

ㆍ발행기관 : 한국탄소학회 ㆍ수록지정보 : Carbon Letters / 17권 / 1호
ㆍ저자명 : Ulziidelger Byambasuren, Yukwon Jeon, Dorjgotov Altansukh, Yunseong Ji, Yong-Gun Shul

목차

1. Introduction
2. Experimental
3. Results and discussion
4. Conclusion
References

한국어 초록

Nitrogen (N)-doped ordered mesoporous carbons (OMCs) with a dual transition metalsystem were synthesized as non-Pt catalysts for the ORR. The highly nitrogen dopedOMCs were prepared by the precursor of ionic liquid (3-methyl-1-butylpyridine dicyanamide)for N/C species and a mesoporous silica template for the physical structure.Mostly, N-doped carbons are promoted by a single transition metal to improvecatalytic activity for ORR in PEMFCs. In this study, our N-doped mesoporous carbonswere promoted by the dual transition metals of iron and cobalt (Fe, Co), which wereincorporated into the N-doped carbons lattice by subsequently heat treatments. All theprepared carbons were characterized by via transmission electron microscopy (TEM),X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). To evaluate theactivities of synthesized doped carbons, linear sweep was recorded in an acidic solutionto compare the ORR catalytic activities values for the use in the PEMFC system. Thedual transition metal promotion improved the ORR activity compared with the singletransition metal promotion, due to the increase in the quaternary nitrogen species fromthe structural change by the dual metals. The effect of different ratio of the dual metalsinto the N doped carbon were examined to evaluate the activities of the oxygen reductionreaction.

영어 초록

Nitrogen (N)-doped ordered mesoporous carbons (OMCs) with a dual transition metal
system were synthesized as non-Pt catalysts for the ORR. The highly nitrogen doped
OMCs were prepared by the precursor of ionic liquid (3-methyl-1-butylpyridine dicyanamide)
for N/C species and a mesoporous silica template for the physical structure.
Mostly, N-doped carbons are promoted by a single transition metal to improve
catalytic activity for ORR in PEMFCs. In this study, our N-doped mesoporous carbons
were promoted by the dual transition metals of iron and cobalt (Fe, Co), which were
incorporated into the N-doped carbons lattice by subsequently heat treatments. All the
prepared carbons were characterized by via transmission electron microscopy (TEM),
X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). To evaluate the
activities of synthesized doped carbons, linear sweep was recorded in an acidic solution
to compare the ORR catalytic activities values for the use in the PEMFC system. The
dual transition metal promotion improved the ORR activity compared with the single
transition metal promotion, due to the increase in the quaternary nitrogen species from
the structural change by the dual metals. The effect of different ratio of the dual metals
into the N doped carbon were examined to evaluate the activities of the oxygen reduction
reaction.

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