2 research outputs found

    Low-Voltage Electrolytic Hydrogen Production Derived from Efficient Water and Ethanol Oxidation on Fluorine-Modified FeOOH Anode

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    Highly active, earth-abundant anode catalysts are urgently required for the development of electrolytic devices for hydrogen generation. However, the reaction efficiencies of most developed electrocatalysts have been intrinsically limited due to their insufficient adsorption of reactants leading to high energy intermediates. Here, we establish that electronegative fluorine can moderate the binding energy between the Fe sites (FeOOH) and reactants (OH<sup>–</sup> or C<sub>2</sub>H<sub>5</sub>O<sup>–</sup>), resulting in more optimized adsorption, and can enhance the positive charge densities on the Fe sites to facilitate oxygen evolution reaction (OER) and ethanol oxidation. Consequently, a low electrolytic voltage (1.43 V to achieve 10 mA cm<sup>–2</sup>) for H<sub>2</sub> production was obtained by integrating the efficiently anodic behaviors of OER and ethanol oxidation. The results reported herein point to fluorine moderation as a promising pathway for developing optimal electrocatalysts and contribute to ongoing efforts of mimicking water splitting

    Ammonia Electrosynthesis with High Selectivity under Ambient Conditions via a Li<sup>+</sup> Incorporation Strategy

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    We report the discovery of a dramatically enhanced N<sub>2</sub> electroreduction reaction (NRR) selectivity under ambient conditions via the Li<sup>+</sup> incorporation into poly­(<i>N</i>-ethyl-benzene-1,2,4,5-tetracarboxylic diimide) (PEBCD) as a catalyst. The detailed electrochemical evaluation and density functional theory calculations showed that Li<sup>+</sup> association with the O atoms in the PEBCD matrix can retard the HER process and can facilitate the adsorption of N<sub>2</sub> to afford a high potential scope for the NRR process to proceed in the “[OLi<sup>+</sup>]·N<sub>2</sub>H<sub><i>x</i></sub>” alternating hydrogenation mode. This atomic-scale incorporation strategy provides new insight into the rational design of NRR catalysts with higher selectivity
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