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Deciphering the Electrocatalytic Activity of Nitrogen-Doped Carbon Embedded with Cobalt Nanoparticles and the Reaction Mechanism of Triiodide Reduction in Dye-Sensitized Solar Cells

Title
Deciphering the Electrocatalytic Activity of Nitrogen-Doped Carbon Embedded with Cobalt Nanoparticles and the Reaction Mechanism of Triiodide Reduction in Dye-Sensitized Solar Cells
Author
이상욱
Keywords
COUNTER ELECTRODE MATERIALS; INITIO MOLECULAR-DYNAMICS; TOTAL-ENERGY CALCULATIONS; METAL-ORGANIC FRAMEWORK; AUGMENTED-WAVE METHOD; MESOPOROUS CARBON; GRAPHITIC CARBON; PLATINUM-ELECTRODE; HIGH-EFFICIENCY; BASIS-SET
Issue Date
2017-12
Publisher
AMER CHEMICAL SOC
Citation
JOURNAL OF PHYSICAL CHEMISTRY C, v. 121, no. 49, page. 27332-27343
Abstract
The electrocatalytic activity of carbon materials for triiodide (I-3(-)) reduction has spurred the development of low-cost electrocatalysts as an alternative to platinum in dye-sensitized solar cells. While many catalytic aspects of nitrogen-doped carbons have been unveiled in recent years, not all underlying factors that dictate their electrocatalytic activity have been fully considered; the current understanding of the electrocatalytic activity of nitrogen-doped carbons is limited. In addition, the synergistic effect of metal nanoparticles embedded in nitrogen-doped carbon, which was recently demonstrated as a facile way to boost the electrocatalytic activity of carbon, remains elusive. This work sheds light on these unknown aspects of carbon's electrocatalytic activity by carrying out a systematic investigation of nitrogen-doped carbon with incorporated cobalt nanoparticles. Furthermore, the generally accepted mechanism of the I-3(-) reduction reaction (IRR) is re-evaluated in this work with the aid of density functional theory calculations and in-depth electrochemical analysis. A new insight into this mechanism, which suggests that there is another possible reaction pathway available for the IRR on carbon, is provided.
URI
https://pubs.acs.org/doi/10.1021/acs.jpcc.7b09758https://repository.hanyang.ac.kr/handle/20.500.11754/116683
ISSN
1932-7447
DOI
10.1021/acs.jpcc.7b09758
Appears in Collections:
GRADUATE SCHOOL[S](대학원) > BIONANOTECHNOLOGY(바이오나노학과) > Articles
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