Single-Crystal Nitrogen-Rich Two-Dimensional Mo5N6 Nanosheets for Efficient and Stable Seawater Splitting
- 29 November 2018
- journal article
- research article
- Published by American Chemical Society (ACS) in ACS Nano
- Vol. 12 (12), 12761-12769
- https://doi.org/10.1021/acsnano.8b07841
Abstract
Transition metal nitrides (TMNs) have great potential for energy related electrocatalysis because of their inherent electronic properties. However, incorporating nitrogen into a transition metal lattice is thermodynamically unfavorable, and therefore most of the developed TMNs are deficient in nitrogen. Consequently, these TMNs exhibit poor structural stability and unsatisfactory performance for electrocatalytic applications. In this work, we design and synthesize an atomically thin nitrogen–rich nanosheets, Mo5N6, with the help of a Ni–inducing growth method. The as-prepared single–crystal electrocatalyst with abundant metal–nitrogen electroactive sites displays outstanding activity for the hydrogen evolution reaction (HER) in a wide range of electrolytes (pH 0–14). Further, the 2D Mo5N6 nanosheets exhibit high HER activity and stability in natural seawater, which are superior to other TMNs and even the Pt benchmark. By combining synchrotron–based spectroscopy and the calculations of electron density of state, we find that the enhanced properties of these nitrogen–rich Mo5N6 nanosheets originates from its Pt-like electronic structure and the high valance state of its Mo atoms.Keywords
Funding Information
- Australian Research Council (DP160104866, FL170100154, DE160101163, DP170104464)
This publication has 43 references indexed in Scilit:
- Charge State Manipulation of Cobalt Selenide Catalyst for Overall Seawater ElectrolysisAdvanced Energy Materials, 2018
- A sea-change: manganese doped nickel/nickel oxide electrocatalysts for hydrogen generation from seawaterEnergy & Environmental Science, 2018
- Tailoring the d‐Band Centers Enables Co4N Nanosheets To Be Highly Active for Hydrogen Evolution CatalysisAngewandte Chemie, 2018
- Emerging Two-Dimensional Nanomaterials for ElectrocatalysisChemical Reviews, 2018
- In Situ Electrochemical Production of Ultrathin Nickel Nanosheets for Hydrogen Evolution ElectrocatalysisChem, 2017
- Combining theory and experiment in electrocatalysis: Insights into materials designScience, 2017
- Superb Alkaline Hydrogen Evolution and Simultaneous Electricity Generation by Pt‐Decorated Ni3N NanosheetsAdvanced Energy Materials, 2016
- Interface Engineering of MoS2/Ni3S2 Heterostructures for Highly Enhanced Electrochemical Overall‐Water‐Splitting ActivityAngewandte Chemie, 2016
- Just a Dream—or Future Reality?Science, 2009
- Electrodes for generation of hydrogen and oxygen from seawaterInternational Journal of Hydrogen Energy, 1980