Te-Doped Pd Nanocrystal for Electrochemical Urea Production by Efficiently Coupling Carbon Dioxide Reduction with Nitrite Reduction.
basic_science · Level V
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- Record sourced from PubMed, PMID 33172281.
- Also identified by DOI 10.1021/acs.nanolett.0c03400.
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Abstract
The renewable electricity-driven reduction of carbon dioxide (CO<sub>2</sub>RR) is a promising technology for carbon utilization. However, it is still a challenge to broaden the application of CO<sub>2</sub>RR. Herein, we report a Te-doped Pd nanocrystals (Te-Pd NCs) for promoting urea synthesis by coupling CO<sub>2</sub>RR with electrochemical reduction of nitrite. The electrochemical synthesis of urea has been achieved with nearly 12.2% Faraday efficiency (FE) and 88.7% N atom efficiency (NE) at -1.1 V versus reversible hydrogen electrode (vs RHE), much higher than those of pure Pd NCs (4.2% FE and 21.8% NE). Significantly, an FE of ∼10.2% and an NE of ∼82.3% for urea solution production via an optimized flow cell system have been realized, where a solution with up to 0.95 wt % of urea has been obtained. Mechanistic insights show that Te-doping not only optimizes the CO<sub>2</sub>/CO adsorption but also promotes NH<sub>3</sub> production, fully meeting the requirements of urea synthesis.