Tailoring the porosity of MOF-derived N-doped carbon electrocatalysts for highly efficient solar energy conversion

Cited 0 time in webofscience Cited 0 time in scopus
9 Viewed 0 Downloaded
Title
Tailoring the porosity of MOF-derived N-doped carbon electrocatalysts for highly efficient solar energy conversion
Author(s)
Jin Soo Kang; Jiho Kang; Dong Young Chung; Yoon Jun Son; Kim S.; Sungjun Kim; Jin Kim; Juwon Jeong; Lee M.J.; Heejong Shin; Subin Park; Yoo S.J.; Ko M.J.; Yoon J.; Yung-Eun Sung
Publication Date
2018-11
Journal
Journal of Materials Chemistry A, v.6, no.41, pp.20170 - 20183
Publisher
ROYAL SOC CHEMISTRY
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. (c) 2018 The Royal Society of Chemistry
URI
https://pr.ibs.re.kr/handle/8788114/5058
ISSN
2050-7488
Appears in Collections:
Center for Nanoparticle Research(나노입자 연구단) > Journal Papers (저널논문)
Files in This Item:
2. Tailoring the porosity of MOF-derived N-doped carbon electrocatalysts for highly efficient solar energy conversion.pdfDownload

qrcode

  • facebook

    twitter

  • Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.
해당 아이템을 이메일로 공유하기 원하시면 인증을 거치시기 바랍니다.

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse