journal article·2022-04-20

Ultrasmall Cu Nanocrystals Dispersed in Nitrogen-Doped Carbon as Highly Efficient Catalysts for CO2 Electroreduction

Xiangfu Meng, Guoxing Pan, Hongji Liu, Yong Qian, Xingyu Wang, Changlai Wang, Lin Hu, Hui Wang, Qianwang Chen

ACS Applied Materials & Interfaces· Volume 14· Issue 15
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Abstract

The electroreduction of carbon dioxide (CO2) to a liquid product is a viable method for establishing an artificial carbon cycle. Unfortunately, most electrocatalysts’ low efficiency and instability prevent them from being used in practical applications. In the current study, we developed ultrasmall Cu nanocrystals embedded in nitrogen-doped carbon nanosheets (Cu/NC-NSs) for selective CO2 electroreduction by adjusting the potential. Cu/NC-NSs had 43.7 and 63.5% Faradaic efficiencies for the synthesis of ethanol and formate with applied potentials of −0.37 and −0.77 V vs reversible hydrogen electrode (RHE) using a flow cell architecture, respectively. Moreover, these Cu/NC-NSs show a steady catalytic performance up to 16 h. Density functional theory (DFT) calculations were performed to investigate the reaction mechanism. Furthermore, the synergistic effect formed by nitrogen-doped carbon and highly dispersed copper atoms led to their excellent performance in CO2 electroreduction.
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Research context

OpenAlex topics: CO2 Reduction Techniques and Catalysts · Ionic liquids properties and applications · Carbon dioxide utilization in catalysis

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

Affiliations

High Magnetic Field Laboratory, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui 230031, P. R. China

Hefei National Laboratory for Physical Science at Microscale, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China

Institutes of Physical Science and Information Technology, Anhui University, Hefei, Anhui 230601, P. R. China

Center of Super-Diamond and Advanced Films (COSDAF), Department of Materials Science and Engineering, City University of Hong Kong, Kowloon, Hong Kong 999077, Hong Kong

Funding

Central University Basic Research Fund of China · Ministry of Human Resources and Social Security · National Natural Science Foundation of China · Chinese Academy of Sciences · Key Lab of Photovoltaic and Energy Conservation Materials · Hefei Municipal Natural Science Foundation

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