Nature Chemistry

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Spontaneous doping of the basal plane of MoS<sub>2</sub> single layers through oxygen substitution under ambient conditions

2018-09-17T18:05:12+00:00September 17th, 2018|Categories: Publications|Tags: |

Spontaneous doping of the basal plane of MoS2 single layers through oxygen substitution under ambient conditionsSpontaneous doping of the basal plane of MoS<sub>2</sub> single layers through oxygen substitution under ambient conditions, Published online: 17 September 2018; doi:10.1038/s41557-018-0136-2MoS2 single layers spontaneously undergo a slow oxygen substitution reaction under ambient conditions giving rise to solid-solution-type 2D molybdenum oxy-sulfide crystals. The oxygen substitution sites of the 2D MoS2−xOx crystals act as efficient single-atom catalytic centres for the hydrogen evolution reaction.

Published in: "Nature Chemistry (Advanced Online Publication)".

Spontaneous doping of the basal plane of MoS<sub>2</sub> single layers through oxygen substitution under ambient conditions

2018-09-17T16:33:56+00:00September 17th, 2018|Categories: Publications|Tags: |

Spontaneous doping of the basal plane of MoS2 single layers through oxygen substitution under ambient conditionsSpontaneous doping of the basal plane of MoS<sub>2</sub> single layers through oxygen substitution under ambient conditions, Published online: 17 September 2018; doi:10.1038/s41557-018-0136-2MoS2 single layers spontaneously undergo a slow oxygen substitution reaction under ambient conditions giving rise to solid-solution-type 2D molybdenum oxy-sulfide crystals. The oxygen substitution sites of the 2D MoS2−xOx crystals act as efficient single-atom catalytic centres for the hydrogen evolution reaction.

Published in: "Nature Chemistry".

Formation of the layered conductive magnet CrCl<sub>2</sub>(pyrazine)<sub>2</sub> through redox-active coordination chemistry

2018-09-10T18:05:07+00:00September 10th, 2018|Categories: Publications|

Formation of the layered conductive magnet CrCl2(pyrazine)2 through redox-active coordination chemistryFormation of the layered conductive magnet CrCl<sub>2</sub>(pyrazine)<sub>2</sub> through redox-active coordination chemistry, Published online: 10 September 2018; doi:10.1038/s41557-018-0107-7Layered coordination polymers are attractive for the preparation of advanced 2D materials but they are typically non-magnetic insulators. Now such a layered network, CrCl2(pyrazine)2, has been prepared that comprises a paramagnetic metal ion and a redox-active ligand. The material exhibits both magnetism — with a ferrimagnetic ground state — and high electrical conductivity.

Published in: "Nature Chemistry (Advanced Online Publication)".

Formation of the layered conductive magnet CrCl<sub>2</sub>(pyrazine)<sub>2</sub> through redox-active coordination chemistry

2018-09-10T16:34:26+00:00September 10th, 2018|Categories: Publications|

Formation of the layered conductive magnet CrCl2(pyrazine)2 through redox-active coordination chemistryFormation of the layered conductive magnet CrCl<sub>2</sub>(pyrazine)<sub>2</sub> through redox-active coordination chemistry, Published online: 10 September 2018; doi:10.1038/s41557-018-0107-7Layered coordination polymers are attractive for the preparation of advanced 2D materials but they are typically non-magnetic insulators. Now such a layered network, CrCl2(pyrazine)2, has been prepared that comprises a paramagnetic metal ion and a redox-active ligand. The material exhibits both magnetism — with a ferrimagnetic ground state — and high electrical conductivity.

Published in: "Nature Chemistry".

Isoreticular two-dimensional magnetic coordination polymers prepared through pre-synthetic ligand functionalization

2018-08-27T18:05:16+00:00August 27th, 2018|Categories: Publications|

Isoreticular two-dimensional magnetic coordination polymers prepared through pre-synthetic ligand functionalizationIsoreticular two-dimensional magnetic coordination polymers prepared through pre-synthetic ligand functionalization, Published online: 27 August 2018; doi:10.1038/s41557-018-0113-9Surface engineering is an attractive route to tune the processability, stability and functionalities of 2D materials, but typically introduces defects in the resulting structures. Now, the issue has been circumvented through pre-synthetic functionalization instead; an isoreticular family of robust layered coordination polymers has been mechanically exfoliated to give functionalized crystalline magnetic monolayers.

Published in: "Nature Chemistry (Advanced Online Publication)".

Isoreticular two-dimensional magnetic coordination polymers prepared through pre-synthetic ligand functionalization

2018-08-27T16:34:24+00:00August 27th, 2018|Categories: Publications|

Isoreticular two-dimensional magnetic coordination polymers prepared through pre-synthetic ligand functionalizationIsoreticular two-dimensional magnetic coordination polymers prepared through pre-synthetic ligand functionalization, Published online: 27 August 2018; doi:10.1038/s41557-018-0113-9Surface engineering is an attractive route to tune the processability, stability and functionalities of 2D materials, but typically introduces defects in the resulting structures. Now, the issue has been circumvented through pre-synthetic functionalization instead; an isoreticular family of robust layered coordination polymers has been mechanically exfoliated to give functionalized crystalline magnetic monolayers.

Published in: "Nature Chemistry".

N-doping goes <i>sp</i>-hybridized

2018-08-21T18:05:07+00:00August 21st, 2018|Categories: Publications|

N-doping goes sp-hybridizedN-doping goes <i>sp</i>-hybridized, Published online: 21 August 2018; doi:10.1038/s41557-018-0129-1Specific forms of nitrogen doping can endow carbon-based metal-free materials with electrocatalytic activity. Now, introducing sp-hybridized nitrogen atoms into some acetylenic sites of ultra-thin graphdiyne — a highly π-conjugated lamellar carbon allotrope — has led to excellent oxygen reduction reaction activity.

Published in: "Nature Chemistry (Advanced Online Publication)".

N-doping goes <i>sp</i>-hybridized

2018-08-21T16:34:12+00:00August 21st, 2018|Categories: Publications|

N-doping goes sp-hybridizedN-doping goes <i>sp</i>-hybridized, Published online: 21 August 2018; doi:10.1038/s41557-018-0129-1Specific forms of nitrogen doping can endow carbon-based metal-free materials with electrocatalytic activity. Now, introducing sp-hybridized nitrogen atoms into some acetylenic sites of ultra-thin graphdiyne — a highly π-conjugated lamellar carbon allotrope — has led to excellent oxygen reduction reaction activity.

Published in: "Nature Chemistry".

Few-layer graphdiyne doped with sp-hybridized nitrogen atoms at acetylenic sites for oxygen reduction electrocatalysis

2018-08-06T18:05:10+00:00August 6th, 2018|Categories: Publications|

Few-layer graphdiyne doped with sp-hybridized nitrogen atoms at acetylenic sites for oxygen reduction electrocatalysisFew-layer graphdiyne doped with sp-hybridized nitrogen atoms at acetylenic sites for oxygen reduction electrocatalysis, Published online: 06 August 2018; doi:10.1038/s41557-018-0100-1Heteroatom doping is a widely used modification method for carbon-based catalysts. Now, chemically defined sp-hybridized nitrogen atoms have been selectively introduced to the acetylene groups in ultrathin graphdiynes, resulting in good catalytic activity for the oxygen reduction reaction in both alkaline and acidic media.

Published in: "Nature Chemistry (Advanced Online Publication)".

Few-layer graphdiyne doped with sp-hybridized nitrogen atoms at acetylenic sites for oxygen reduction electrocatalysis

2018-08-06T16:34:57+00:00August 6th, 2018|Categories: Publications|

Few-layer graphdiyne doped with sp-hybridized nitrogen atoms at acetylenic sites for oxygen reduction electrocatalysisFew-layer graphdiyne doped with sp-hybridized nitrogen atoms at acetylenic sites for oxygen reduction electrocatalysis, Published online: 06 August 2018; doi:10.1038/s41557-018-0100-1Heteroatom doping is a widely used modification method for carbon-based catalysts. Now, chemically defined sp-hybridized nitrogen atoms have been selectively introduced to the acetylene groups in ultrathin graphdiynes, resulting in good catalytic activity for the oxygen reduction reaction in both alkaline and acidic media.

Published in: "Nature Chemistry".

2D materials worth their salt

2018-06-21T18:05:07+00:00June 21st, 2018|Categories: Publications|Tags: |

2D materials worth their salt2D materials worth their salt, Published online: 21 June 2018; doi:10.1038/s41557-018-0096-6Sodium chloride phases with unconventional non-1:1 stoichiometries are known to exist under high-pressure conditions. Now, Na2Cl and Na3Cl two-dimensional crystals have been obtained under ambient conditions, on graphene surfaces, from dilute solutions.

Published in: "Nature Chemistry (Advanced Online Publication)".

2D materials worth their salt

2018-06-21T16:34:54+00:00June 21st, 2018|Categories: Publications|Tags: |

2D materials worth their salt2D materials worth their salt, Published online: 21 June 2018; doi:10.1038/s41557-018-0096-6Sodium chloride phases with unconventional non-1:1 stoichiometries are known to exist under high-pressure conditions. Now, Na2Cl and Na3Cl two-dimensional crystals have been obtained under ambient conditions, on graphene surfaces, from dilute solutions.

Published in: "Nature Chemistry".

Two-dimensional Na–Cl crystals of unconventional stoichiometries on graphene surface from dilute solution at ambient conditions

2018-05-07T19:58:10+00:00May 7th, 2018|Categories: Publications|Tags: |

Two-dimensional Na–Cl crystals of unconventional stoichiometries on graphene surface from dilute solution at ambient conditionsTwo-dimensional Na–Cl crystals of unconventional stoichiometries on graphene surface from dilute solution at ambient conditions, Published online: 07 May 2018; doi:10.1038/s41557-018-0061-4The common form of salt has a 1:1 ratio of Na+ and Cl−; however, species that deviate from this can be found under extreme conditions, such as high pressure. Now, as a result of cation–π interactions that promote ion–surface adsorption, Na2Cl and Na3Cl have been observed as two-dimensional crystals on graphene at ambient conditions.

Published in: "Nature Chemistry (Advanced Online Publication)".

Two-dimensional Na–Cl crystals of unconventional stoichiometries on graphene surface from dilute solution at ambient conditions

2018-05-07T16:31:28+00:00May 7th, 2018|Categories: Publications|Tags: |

Two-dimensional Na–Cl crystals of unconventional stoichiometries on graphene surface from dilute solution at ambient conditionsTwo-dimensional Na–Cl crystals of unconventional stoichiometries on graphene surface from dilute solution at ambient conditions, Published online: 07 May 2018; doi:10.1038/s41557-018-0061-4The common form of salt has a 1:1 ratio of Na+ and Cl−; however, species that deviate from this can be found under extreme conditions, such as high pressure. Now, as a result of cation–π interactions that promote ion–surface adsorption, Na2Cl and Na3Cl have been observed as two-dimensional crystals on graphene at ambient conditions.

Published in: "Nature Chemistry".

High phase-purity 1T′-MoS<sub>2</sub>- and 1T′-MoSe<sub>2</sub>-layered crystals

2018-04-02T19:57:40+00:00April 2nd, 2018|Categories: Publications|Tags: , |

High phase-purity 1T′-MoS2- and 1T′-MoSe2-layered crystalsHigh phase-purity 1T′-MoS<sub>2</sub>- and 1T′-MoSe<sub>2</sub>-layered crystals, Published online: 02 April 2018; doi:10.1038/s41557-018-0035-6The phase in which a crystal exists can have a direct influence over its properties; however, it is usually difficult to control during synthesis. Now it has been shown that micrometre-sized metallic 1T′-MoS2- and 1T′-MoSe2-layered crystals can be prepared in high phase purity on a large scale, and that they display promising electrocatalytic activity towards the hydrogen evolution reaction.

Published in: "Nature Chemistry (Advanced Online Publication)".

High phase-purity 1T′-MoS<sub>2</sub>- and 1T′-MoSe<sub>2</sub>-layered crystals

2018-04-02T16:31:37+00:00April 2nd, 2018|Categories: Publications|Tags: , |

High phase-purity 1T′-MoS2- and 1T′-MoSe2-layered crystalsHigh phase-purity 1T′-MoS<sub>2</sub>- and 1T′-MoSe<sub>2</sub>-layered crystals, Published online: 02 April 2018; doi:10.1038/s41557-018-0035-6The phase in which a crystal exists can have a direct influence over its properties; however, it is usually difficult to control during synthesis. Now it has been shown that micrometre-sized metallic 1T′-MoS2- and 1T′-MoSe2-layered crystals can be prepared in high phase purity on a large scale, and that they display promising electrocatalytic activity towards the hydrogen evolution reaction.

Published in: "Nature Chemistry".

MoS2 monolayer catalyst doped with isolated Co atoms for the hydrodeoxygenation reaction

2017-07-31T12:30:21+00:00July 31st, 2017|Categories: Publications|Tags: |

Nature Chemistry 9, 810 (2017). doi:10.1038/nchem.2740 Authors: Guoliang Liu, Alex W. Robertson, Molly Meng-Jung Li, Winson C. H. Kuo, Matthew T. Darby, Mohamad H. Muhieddine, Yung-Chang Lin, Kazu Suenaga, Michail Stamatakis, Jamie H. Warner & Shik Chi Edman Tsang Converting oxygen-rich biomass into fuels requires the removal of oxygen groups through hydrodeoxygenation. MoS2 monolayer sheets decorated with isolated Co atoms bound to sulfur vacancies in the basal plane have now been synthesized that exhibit superior catalytic activity, selectivity and stability for the hydrodeoxygenation of 4-methylphenol to toluene when compared to conventionally prepared materials.

Published in: "Nature Chemistry".

Supramolecular heterostructures formed by sequential epitaxial deposition of two-dimensional hydrogen-bonded arrays

2017-07-24T19:57:30+00:00July 24th, 2017|Categories: Publications|Tags: , |

Nature Chemistry. doi:10.1038/nchem.2824 Authors: Vladimir V. Korolkov, Matteo Baldoni, Kenji Watanabe, Takashi Taniguchi, Elena Besley & Peter H. Beton Supramolecular heterostructures have been formed by the sequential deposition of two molecular layers with different symmetries and lattice constants — one consisting of carboxylic acid, the other of cyanuric acid and melamine — on a hexagonal boron nitride substrate. Characterization by atomic force microscopy and molecular dynamics simulations shows epitaxial arrangements between the layers.

Published in: "Nature Chemistry (Advanced Online Publication)".

MoS2 monolayer catalyst doped with isolated Co atoms for the hydrodeoxygenation reaction

2017-07-20T19:57:30+00:00July 20th, 2017|Categories: Publications|Tags: |

Nature Chemistry. doi:10.1038/nchem.2740 Authors: Guoliang Liu, Alex W. Robertson, Molly Meng-Jung Li, Winson C. H. Kuo, Matthew T. Darby, Mohamad H. Muhieddine, Yung-Chang Lin, Kazu Suenaga, Michail Stamatakis, Jamie H. Warner & Shik Chi Edman Tsang Converting oxygen-rich biomass into fuels requires the removal of oxygen groups through hydrodeoxygenation. MoS2 monolayer sheets decorated with isolated Co atoms bound to sulfur vacancies in the basal plane have now been synthesized that exhibit superior catalytic activity, selectivity and stability for the hydrodeoxygenation of 4-methylphenol to toluene when compared to conventionally prepared materials.

Published in: "Nature Chemistry (Advanced Online Publication)".

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