Tailoring the porosity of MOF-derived N-doped carbon electrocatalysts for highly efficient solar energy conversion
- Title
- Tailoring the porosity of MOF-derived N-doped carbon electrocatalysts for highly efficient solar energy conversion
- Author
- 고민재
- Keywords
- METAL-ORGANIC FRAMEWORKS; COUNTER-ELECTRODE CATALYST; NANOPOROUS CARBONS; MESOPOROUS CARBON; TRIIODIDE REDUCTION; POROUS CARBON; ACTIVE-SITES; LOW-COST; CELLS; NANOPARTICLES
- Issue Date
- 2018-11
- Publisher
- ROYAL SOC CHEMISTRY
- Citation
- JOURNAL OF MATERIALS CHEMISTRY A, v. 6, no. 41, page. 20170-20183
- Abstract
- Metal-organic framework (MOF)-derived carbon materials have been widely used as catalysts for a variety of electrochemical energy applications, and thermally carbonized zinc-2-methylimidazole (ZIF-8) has shown particularly high performance owing to its microporous structure with a large surface area. However, in the presence of bulky chemical species, such as triiodide, in mesoscopic dye-sensitized solar cells (DSCs), the small pore size of carbonized ZIF-8 causes a significant limitation in mass transfer and consequentially results in a poor performance. To resolve this problem, we herein report a simple strategy to enlarge the pore sizes of ZIF-8-derived carbon by increasing the dwelling time of Zn in ZIF-8 during the thermal carbonization process. A thin and uniform polydopamine shell introduced on the surface of ZIF-8, with the aim of retarding the escape of vaporized Zn species, leads to a dramatic increase in pore sizes, from the micropore to mesopore range. The porosity-tailored carbonized ZIF-8 manifests an excellent electrocatalytic performance in triiodide reduction, and when it was applied as the counter electrode of DSCs, an energy conversion efficiency of up to 9.03% is achievable, which is not only superior to that of the Pt-based counterpart but also among the highest performances of DSCs employing carbonaceous electrocatalysts.
- URI
- https://pubs.rsc.org/en/content/articlelanding/2018/TA/C8TA07190J#!divAbstracthttps://repository.hanyang.ac.kr/handle/20.500.11754/120643
- ISSN
- 2050-7488; 2050-7496
- DOI
- 10.1039/c8ta07190j
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > CHEMICAL ENGINEERING(화학공학과) > Articles
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