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https://hdl.handle.net/2440/114455
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Type: | Journal article |
Title: | Co@C/CoOx coupled with N-doped layer-structured carbons for excellent CO₂ capture and oxygen reduction reaction |
Other Titles: | Co@C/CoOx coupled with N-doped layer-structured carbons for excellent CO(2) capture and oxygen reduction reaction |
Author: | Zhang, H. Tian, W. Qian, Z. Ouyang, T. Saunders, M. Qin, J. Wang, S. Tadé, M.O. Sun, H. |
Citation: | Carbon, 2018; 133:306-315 |
Publisher: | Elsevier |
Issue Date: | 2018 |
ISSN: | 0008-6223 1873-3891 |
Statement of Responsibility: | Huayang Zhang, Wenjie Tian, Zhao Qian, Tianhong Ouyang, Martin Saunders, Jingyu Qin, Shaobin Wang, Moses O. Tadé, Hongqi Sun |
Abstract: | Current environmental and energy issues urge the advance of stable and cost-effective porous nanostructures for highly efficient electrochemical energy conversion/storage, and gas adsorption/separation. Herein, we report a one-pot, scalable pyrolysis process for fabrication of hierarchically layer-structured porous carbons with nitrogen doping and cobalt modification (Co-N-PCs) for efficient high-pressure CO2 gas adsorption and oxygen reduction reaction (ORR). Co-N-PCs possess large specific surface areas and abundant layered macropores containing micropores and narrow mesopores, coupled with core-shell Co@C/CoOx structure. Co-N-PC 800 (synthesized at 800 °C) shows a high CO2 capture capability of 18.5 mmol g−1 at 10 bar (0 °C) and an outstanding catalytic activity for ORR. Density functional theory (DFT) calculations reveal that the cobalt cores inside graphene layers powerfully promote electron transfer from Co to surrounding C atoms, which work together with doped N to create superior catalytically active sites in the graphene shells. In addition, the negative charge states of C induced in N-doped Co@C structure contribute to the capture of CO2. |
Description: | Available online 19 March 2018 |
Rights: | © 2018 Elsevier Ltd. All rights reserved. |
DOI: | 10.1016/j.carbon.2018.03.044 |
Grant ID: | http://purl.org/au-research/grants/arc/DP150103026 http://purl.org/au-research/grants/arc/LE120100026 |
Published version: | http://dx.doi.org/10.1016/j.carbon.2018.03.044 |
Appears in Collections: | Aurora harvest 3 Chemical Engineering publications |
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