Achieving tolerant CO2 electro-reduction catalyst in real water matrix

Da Hye Won, Hyeyoung Shin, Min Wook Chung, Hyejin Jung, Keun Hwa Chae, Hyung Suk Oh, Yun Jeong Hwang, Byoung Koun Min

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)

Abstract

In order to achieve practical application of electrochemical CO2 conversion technologies, the development of durable catalyst in real water matrix is essential because the use of catalysts only showing high performance within a well-refined environment cannot guarantee their feasibility in realistic conditions. Here, we report a design strategy for a catalyst, which shows excellent tolerance to deactivation factors, using a carbon-based material under more practical condition implemented by real tap water. Screening analyses on various components in tap water elucidated that the impurity group, which can be deposited on the catalyst surface and impede the active sites, such as copper, zinc, and especially iron are the main factors responsible for deactivation. Based on these findings, the structural modified nitrogen-doped carbon nanotube (denoted as ball mill N-CNT) was adopted as a catalyst design to secure durability. Consequently, the ball mill N-CNT revealed tolerance to the disclosed deactivation factors and showed stable performance during unprecedented long-time of 120 h in tap water media.

Original languageEnglish
Article number117961
JournalApplied Catalysis B: Environmental
Volume258
DOIs
Publication statusPublished - 2019 Dec 5

Bibliographical note

Funding Information:
This work was supported by the program of the Korea Institute of Science and Technology (KIST) and partially by “Next Generation Carbon Upcycling Project” (Project No. 2017M1A2A2046713 ) through the National Research Foundation (NRF) funded by the Korean government.

Publisher Copyright:
© 2019 Elsevier B.V.

Keywords

  • Carbon dioxide
  • Carbon monoxide
  • Electrocatalyst
  • Stability
  • Tap water

ASJC Scopus subject areas

  • Catalysis
  • General Environmental Science
  • Process Chemistry and Technology

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