These tools will no longer be maintained as of December 31, 2024. Archived website can be found here. PubMed4Hh GitHub repository can be found here. Contact NLM Customer Service if you have questions.


Pubmed for Handhelds

PUBMED FOR HANDHELDS

Search MEDLINE/PubMed

  • Title: Facet-controlled palladium nanocrystalline for enhanced nitrate reduction towards ammonia.
    Author: Han Y, Zhang X, Cai W, Zhao H, Zhang Y, Sun Y, Hu Z, Li S, Lai J, Wang L.
    Journal: J Colloid Interface Sci; 2021 Oct 15; 600():620-628. PubMed ID: 34034122.
    Abstract:
    Electrochemical nitrate reduction reaction (NO3-RR) is considered an appealing way for producing ammonia (NH3) under ambient conditions and solving environmental problems caused by nitrate, whereas the lack of adequate catalysts hampers the development of NO3-RR. Here, we firstly demonstrate that the Pd nanocrystalline with a well-desired facet can act as a highly efficient NO3-RR electrocatalyst for ambient ammonia synthesis. Pd (1 1 1) exhibits excellent activity and selectivity in reducing NO3- to NH4+ with a Faradaic efficiency of 79.91% and an NH4+ production of 0.5485 mmol h-1 cm-2 (2.74 mmol h-1 mg-1) in 0.1 M Na2SO4 (containing 0.1 M NO3-), which is 1.4 times higher than Pd (1 0 0) and 1.9 times higher than Pd (1 1 0), respectively. Density functional theory (DFT) calculation reveals that the superior NO3-RR activity of Pd (1 1 1) originates from its optimized activity of NO3- adsorption, smaller free energy change of the rate-limiting step (*NH3 to NH3), and poorer hydrogen evolution reaction activity (HER, competitive reaction). This work not only highlights the potentials of Pd-based nanocatalysts for NO3-RR but also provides new insight for the applications in NO3-RR of other facet-orientation nanomaterials.
    [Abstract] [Full Text] [Related] [New Search]