10ST SEP. 2020
Dear Referees.,
Please find enclosed our manuscript entitled “Ttile”. We are very excited to submit it under your consideration for publication in Journal of ..
Hydrogen is regarded as the real substitute for fossil fuels in the future because of its highest mass-specific energy density and zero carbon dioxide emission. Most of Pt-like catalysts only show their best performance in acidic solutions, and the HER rate in acidic media is usually about 2-3 orders of magnitude higher than that in alkaline media. To best of our knowledge, the best catalysts for another half reaction (oxygen evolution reaction) of water splitting always work efficiently in alkaline or neutral solutions. In this regard, it is highly challenging to developed Pt-like electrocatalysts for H ER in all pH electrolytic media.
In this article, we synthesized an isolated single-atom ruthenium (Ru SA) sites catalyst supported on Nitrogen (N)-Doped Ti3C2T x MXene (N-Ti3C2T x) through a coordination-assisted strategy. The catalyst displays superior activity toward the hydrogen evolution reaction at all pH value. The resultant Ru SA-N-Ti3C2T x catalyst exhibits outstanding catalytic performance with a low overpotential of 23, 27 and 81 m
V to achieve the current density of 10 mA cm−2 in 0.5 M H2SO4, 1 M KOH and 1 M PBS, respectively. Additionally, Ru SA-N-Ti3C2T x shows long-term stability with negligible degradation under basic, acidic and neutral media, which is much better than commercial Pt/C catalyst. Density functional theory calculations suggest that the strong covalent interactions between Ru SA and N sites on the Ti3C2T x MXene support contribute to the exceptional catalytic performance and stability. This work can serve a coordination-engineered strategy to effectively manipulate the catalytic properties of the MXene family by an atomic-level engineering strategy.
Many thanks for your consideration and time.
Yours Sincerely,
reaction mass
A/Prof. .............
Associate Professor, Principal Research Fellow Institute for
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