Turning Harmful Deposition of Metal Impurities into Activation of Nitrogen-Doped Carbon Catalyst toward Durable Electrochemical CO₂Reduction

Chanyeon Kim; Yoong-Kee Choe; Da Hye Won; Ung Lee; Hyung-Suk Oh; Dong Ki Lee; Chang Hyuck Choi; Sungho Yoon; Woong Kim; Yun Jeong Hwang; Byoung Koun Min

doi:10.1021/acsenergylett.9b01581

journal article·2019-09-13

Turning Harmful Deposition of Metal Impurities into Activation of Nitrogen-Doped Carbon Catalyst toward Durable Electrochemical CO₂Reduction

Chanyeon Kim, Yoong-Kee Choe, Da Hye Won, Ung Lee, Hyung-Suk Oh, Dong Ki Lee, Chang Hyuck Choi, Sungho Yoon, Woong Kim, Yun Jeong Hwang, Byoung Koun Min

ACS Energy Letters· Volume 4· Issue 9

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Source abstract

Abstract

Electrochemical CO2 reduction is typically operated under highly refined electrolyte conditions. However, trace amounts of metal impurities exist even in ultrapure electrolyte solutions, causing a fatal deactivation of the catalysts. To address this issue, various efforts have been made to prevent the harmful deposition of metal impurities on the catalyst. Herein, we designed a new system where metal impurities are utilized as activators. We demonstrated “self-activation” of the N-doped carbon catalyst in the presence of Fe impurity with remarkable stability for 120 h. The origin of the self-activation was the selective adsorption of Fe impurity forming highly dispersed Fe sites through Fe–N interactions. The correlations between the self-activation and number of N sites and their moieties were investigated and further generalized into other metals, such as Ni, Zn, and Cu. This novel general strategy has enormous impact on design of durable catalysts for various electrochemical reactions suffering from deactivation by metal impurities.

Source: openalex_inverted_index · Quality: baseline

Research context

Energy storage Catalysis & surfaces Materials processing

OpenAlex topics: CO2 Reduction Techniques and Catalysts · Ionic liquids properties and applications · Advanced battery technologies research

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

National Research Agenda Division, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea

Research Center for Computational Design of Advanced Functional Materials, National Institute of Advanced Industrial Science and Technology, Tsukuba Central 2, Umezono 1-1-1, Tsukuba 305−8568, Japan

Clean Energy Research Center, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea

Green School, Korea University, Seoul 02841, Republic of Korea

School of Materials Science and Engineering, Gwangju Institute of Science and Technology, Gwangju 61005, Republic of Korea

Department of Applied Chemistry, Kookmin University, Seoul 02707, Republic of Korea

Department of Materials Science and Engineering, Korea University, Seoul 02841, Republic of Korea

Department of Chemical and Biomolecular Engineering, Yonsei University, 50 Yonsei Ro, Seodaemun Gu, Seoul 03722, Republic of Korea

Funding

National Research Foundation of Korea · Korea Institute of Science and Technology · YU-KIST convergence program

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