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- W2911380014 abstract "Abstract Electrosynthesis of NH 3 through the N 2 reduction reaction (NRR) under ambient conditions is regarded as promising technology to replace the industrial energy‐ and capital‐intensive Haber–Bosch process. Herein, a room‐temperature spontaneous redox approach to fabricate a core–shell‐structured Au@CeO 2 composite, with Au nanoparticle sizes below about 10 nm and a loading amount of 3.6 wt %, is reported for the NRR. The results demonstrate that as‐synthesized Au@CeO 2 possesses a surface area of 40.7 m 2 g −1 and a porous structure. As an electrocatalyst, it exhibits high NRR activity, with an NH 3 yield rate of 28.2 μg h −1 cm −2 (10.6 μg h −1 mg −1 cat. , 293.8 μg h −1 mg −1 Au ) and a faradaic efficiency of 9.50 % at −0.4 V versus a reversible hydrogen electrode in 0.01 m H 2 SO 4 electrolyte. The characterization results reveal the presence of rich oxygen vacancies in the CeO 2 nanoparticle shell of Au@CeO 2 ; these are favorable for N 2 adsorption and activation for the NRR. This has been further verified by theoretical calculations. The abundant oxygen vacancies in the CeO 2 nanoparticle shell, combined with the Au nanoparticle core of Au@CeO 2 , are electrocatalytically active sites for the NRR, and thus, synergistically enhance the conversion of N 2 into NH 3 ." @default.
- W2911380014 created "2019-02-21" @default.
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- W2911380014 date "2019-03-22" @default.
- W2911380014 modified "2023-10-16" @default.
- W2911380014 title "Ambient Electrosynthesis of Ammonia on a Core–Shell‐Structured Au@CeO <sub>2</sub> Catalyst: Contribution of Oxygen Vacancies in CeO <sub>2</sub>" @default.
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- W2911380014 doi "https://doi.org/10.1002/chem.201806377" @default.
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