CAS OpenIR
Ultrasmall Co2P2O7 nanocrystals anchored on nitrogen-doped graphene as efficient electrocatalysts for the oxygen reduction reaction
Li, KD; Guo, MJ; Yan, Y; Zhan, K; Yang, JH; Zhao, B; Li, JQ; Li, Kaidi; Guo, Mingjing; Yan, Ya; Zhan, Ke; Yang, Junhe; Zhao, Bin; Li, Jianqiang
2019
Source PublicationNEW JOURNAL OF CHEMISTRY
ISSN1144-0546
Volume43Issue:17Pages:6492
AbstractAlthough cobalt pyrophosphate (Co2P2O7) has shown promise as a potential electrocatalyst for the oxygen evolution reaction (OER), its electrocatalytic activity for the oxygen reduction reaction (ORR) has rarely been explored. In this work, a novel composite catalyst with in situ grown Co2P2O7 on nitrogen-doped graphene nanosheets (Co2P2O7/N-rGO) was fabricated by a facile one-step pyrolysis method. Pyrolysis temperature was found to have a significant effect on the morphology, structure and ORR performance of the composites. The catalyst fabricated at 800 degrees C (Co2P2O7/N-rGO-800) presented ultrasmall Co2P2O7 nanocrystals (below 5 nm) anchored on N-rGO and the highest pyridinic-N proportion. Benefiting from the full exposure of active sites on the ultrasmall Co2P2O7 nanocrystals, abundant pyridinic-N species and the synergistic effect of Co2P2O7 and N-doped graphene, optimized Co2P2O7/N-rGO-800 not only demonstrates excellent ORR catalytic activity with a positive cathodic peak potential (0.823 V vs. 0.833 V of the commercial Pt/C catalyst), but also shows superior durability and methanol crossover resistance to Pt/C in alkaline solution. In addition, the composite catalyst also exhibits reasonable oxygen evolution reaction (OER) performance and impressive OER stability in KOH solution. These findings suggest that the Co2P2O7/N-rGO catalysts may be promising candidates as oxygen electrocatalysts for future energy conversion applications.
KeywordBIFUNCTIONAL ELECTROCATALYST CARBON NANOTUBES COBALT PHOSPHATE RECENT PROGRESS CATALYSTS IRON NANOPARTICLES OXIDE FOAM MANGANESE
SubtypeArticle
DOI10.1039/c9nj00299e
WOS IDWOS:000468631600006
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/28208
Collection中国科学院过程工程研究所
Recommended Citation
GB/T 7714
Li, KD,Guo, MJ,Yan, Y,et al. Ultrasmall Co2P2O7 nanocrystals anchored on nitrogen-doped graphene as efficient electrocatalysts for the oxygen reduction reaction[J]. NEW JOURNAL OF CHEMISTRY,2019,43(17):6492, 6499.
APA Li, KD.,Guo, MJ.,Yan, Y.,Zhan, K.,Yang, JH.,...&Li, Jianqiang.(2019).Ultrasmall Co2P2O7 nanocrystals anchored on nitrogen-doped graphene as efficient electrocatalysts for the oxygen reduction reaction.NEW JOURNAL OF CHEMISTRY,43(17),6492.
MLA Li, KD,et al."Ultrasmall Co2P2O7 nanocrystals anchored on nitrogen-doped graphene as efficient electrocatalysts for the oxygen reduction reaction".NEW JOURNAL OF CHEMISTRY 43.17(2019):6492.
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