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Toward Full Exposure of "Active Sites": Nanocarbon Electrocatalyst with Surface Enriched Nitrogen for Superior Oxygen Reduction and Evolution Reactivity
G. L. Tian; Q. Zhang; B. S. Zhang; Y. G. Jin; J. Q. Huang; D. S. Su; F. Wei
2014
Source PublicationAdvanced Functional Materials
ISSN1616-301X
Volume24Issue:38Pages:5956-5961
AbstractThe oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) play a decisive role for the efficiency of fuel cells and metal-air batteries. The nitrogen doped carbon materials with low cost and long durability are potential catalysts to replace precious metal catalyst for oxygen electrochemistry; however, the unexposed active sites induced by the bulk dopant atoms are hardly accessible and consequently scarcely contribute to the catalytic property. In this study, carbon nanotubes (CNTs) are selected as the platform to demonstrate the potential of full exposure of active sites' at the surface. Novel N-doped carbon coaxial nanocables with the pristine CNTs as the core and the N-doped carbon layers as the shell are proposed. The accessible and efficient utilization of the integrated nitrogen atoms enriched on the surface, together with the undestroyed intact inner walls, render the electrocatalyst much enhanced electrocatalytic activity and high electrical conductivity of 3.3 S cm(-1), therefore, N-doped nanocables afford higher oxygen reduction current, approximate to 51 mV positively shift onset potential, low peroxide generation, as well as lower overpotential and higher current for oxygen evoluation reaction.
description.department[tian, gui-li ; zhang, qiang ; jin, yu-guang ; huang, jia-qi ; wei, fei] tsinghua univ, dept chem engn, beijing key lab green chem react engn & technol, beijing 100084, peoples r china. [zhang, bingsen ; su, dang sheng] chinese acad sci, inst met res, shenyang 110016, peoples r china. ; tian, gl (reprint author), tsinghua univ, dept chem engn, beijing key lab green chem react engn & technol, beijing 100084, peoples r china. ; zhang-qiang@mails.tsinghua.edu.cn ; dangsheng@fhi-berlin.mpg.de ; wf-dce@tsinghua.edu.cn
KeywordCarbon Catalyst Oxygen Reduction Oxygen Evoluation Nanomaterials Doped Carbon Nanotubes Metal-free Electrocatalysts Layered Double Hydroxide Graphene Quantum Dots Water Oxidation Efficient Synthesis Cobalt Oxide Fuel-cells Catalysis Performance
URL查看原文
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/73391
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
G. L. Tian,Q. Zhang,B. S. Zhang,et al. Toward Full Exposure of "Active Sites": Nanocarbon Electrocatalyst with Surface Enriched Nitrogen for Superior Oxygen Reduction and Evolution Reactivity[J]. Advanced Functional Materials,2014,24(38):5956-5961.
APA G. L. Tian.,Q. Zhang.,B. S. Zhang.,Y. G. Jin.,J. Q. Huang.,...&F. Wei.(2014).Toward Full Exposure of "Active Sites": Nanocarbon Electrocatalyst with Surface Enriched Nitrogen for Superior Oxygen Reduction and Evolution Reactivity.Advanced Functional Materials,24(38),5956-5961.
MLA G. L. Tian,et al."Toward Full Exposure of "Active Sites": Nanocarbon Electrocatalyst with Surface Enriched Nitrogen for Superior Oxygen Reduction and Evolution Reactivity".Advanced Functional Materials 24.38(2014):5956-5961.
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