2 research outputs found
Low-Voltage Electrolytic Hydrogen Production Derived from Efficient Water and Ethanol Oxidation on Fluorine-Modified FeOOH Anode
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
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
“[OLi<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