Spatial Management of CO Diffusion on Tandem Electrode Promotes NH2 Intermediate Formation for Efficient Urea Electrosynthesis
Source abstract
Abstract
Electrocatalytic urea synthesis is a promising alternative to the energy-intensive conventional industrial process. However, it lacks highly active and selective catalyst systems. Herein, we report a Cu/ZnO stacked tandem gas-diffusion electrode (GDE) for selective urea synthesis from electrocatalytic CO 2 and nitrate reduction reactions. The ZnO catalyst layer (CL) segment at the inlet provides a high CO concentration to the downstream Cu CL segment, promoting the conversion of NO 3 – to *NH 2 . The CO-mediated NH 2 formation accelerates the C–N coupling rate for urea synthesis. As a result, the stacked GDE with an optimal ZnO/Cu CL area ratio achieves a high Faradaic efficiency of 37.4% and a high yield of 3.2 μmol h –1 cm –2 for urea at −0.3 V vs RHE under ambient conditions. This work expands the application of tandem electrodes and realizes the cascade C–N coupling reaction.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Ammonia Synthesis and Nitrogen Reduction · Caching and Content Delivery · CO2 Reduction Techniques and Catalysts
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China
Department of Chemical and Environmental Engineering, University of Cincinnati, Cincinnati, Ohio 45221, United States
Key Laboratory of Advanced Functional Materials and Devices of Anhui Province, Hefei University of Technology, Hefei 230009, China
Funding
China Postdoctoral Science Foundation · Fundamental Research Funds for the Central Universities · Division of Chemical, Bioengineering, Environmental, and Transport Systems · National Natural Science Foundation of China · Natural Science Foundation of Anhui Province · Higher Education Discipline Innovation Project · Anhui Provincial Key Research and Development Plan
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