DataVXACS Energy LettersPaper
journal article·2023-08-11

Trace-Level Cobalt Dopants Enhance CO2 Electroreduction and Ethylene Formation on Copper

Beomil Kim, Ying Chuan Tan, Yeonkyeong Ryu, Kyuseon Jang, Hafiz Ghulam Abbas, Taehyeok Kang, Hyeonuk Choi, Kug-Seung Lee, Sojung Park, Wooyul Kim, Pyuck-Pa Choi, Stefan Ringe, Jihun Oh

ACS Energy Letters· Volume 8· Issue 8
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Source abstract

Abstract

The development of Cu-based catalysts for electrochemical CO 2 reduction reaction (CO 2 RR) with stronger CO-binding elements had been unsuccessful in improving multicarbon production from the CO 2 RR due to CO-poisoning. Here, we discover that trace doping levels of Co atoms in Cu, termed CoCu single-atom alloy (SAA), achieve up to twice the formation rate of CO as compared to bare Cu and further demonstrate a high j C 2 H 4 of 282 mA cm –2 at −1.01 V RHE in a neutral electrolyte. From DFT calculations, Cu sites neighboring CO-poisoned Co atomic sites accelerate CO 2 -to-CO conversion and enhance the coverage of *CO intermediates required for the formation of multicarbon products. Furthermore, CoCu SAA also exhibits active sites that favor the deoxygenation of *HOCCH, which increases the selectivity toward ethylene over ethanol. Ultimately, CoCu SAA can simultaneously boost the formation of *CO intermediates and modulate the selectivity toward ethylene, resulting in one of the highest ethylene yields of 15.6%.
Source: openalex_inverted_index · Quality: baseline

Research context

Energy storageMetals & alloysCatalysis & surfaces

OpenAlex topics: CO2 Reduction Techniques and Catalysts · Ionic liquids properties and applications · Electrocatalysts for Energy Conversion

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

Affiliations

Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea

Institute of Sustainability for Chemicals, Energy and Environment (ISCE2), A*STAR, 2 Fusionopolis Way, Singapore 138634, Singapore

Department of Energy Science and Engineering, Daegu Gyeongbuk Institute of Science & Technology (DGIST), Daegu 42988, Republic of Korea

Department of Chemistry, Korea University, Seoul 02841, Republic of Korea

Pohang Accelerator Laboratory, Pohang University of Science and Technology, Pohang 37673, Republic of Korea

Department of Energy Engineering, Institute for Environmental and Climate Technology, Korea Institute of Energy Technology (KENTECH), Naju 58330, Republic of Korea

Funding

Samsung · Agency for Science, Technology and Research · National Research Foundation of Korea

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