Metallic Porous Iron Nitride and Tantalum Nitride Single Crystals with Enhanced Electrocatalysis Performance

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

  • Feiyan Zhang
  • Shaobo Xi
  • Guoming Lin
  • Xiuli Hu
  • Kui Xie

Detail(s)

Original languageEnglish
Article number1806552
Journal / PublicationAdvanced Materials
Volume31
Issue number7
Publication statusPublished - 15 Feb 2019
Externally publishedYes

Abstract

Altering a material's catalytic properties would require identifying structural features that deliver electrochemically active surfaces. Single-crystalline porous materials, combining the advantages of long-range ordering of bulk crystals and large surface areas of porous materials, would create sufficient active surfaces by stabilizing 2D active moieties confined in lattice and may provide an alternative way to create high-energy surfaces for electrocatalysis that are kinetically trapped. Here, a radical concept of building active metal–nitrogen moieties with unsaturated nitrogen coordination on a porous surface by directly growing metallic porous metal nitride (Fe <sub>3</sub> N and Ta <sub>5</sub> N <sub>6</sub> ) single crystals at unprecedented 2 cm scale is reported. These porous single crystals demonstrate exceptionally high conductivity of 0.1–1.0 × 10 <sup>5</sup> S cm <sup>−1</sup> , while the atomic surface layers of the porous crystals are confirmed to be an Fe termination layer for Fe <sub>3</sub> N and a Ta termination layer for Ta <sub>5</sub> N <sub>6</sub> . The unsaturated metal–nitrogen moieties (Fe <sub>6</sub> –N and Ta <sub>5</sub> –N <sub>3</sub> ) with unique electronic structures demonstrate enhanced electrocatalysis performance and durability. © 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

Research Area(s)

  • active moieties, electrocatalysis, metallic porous crystals, unsaturated coordination

Bibliographic Note

Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to lbscholars@cityu.edu.hk.

Citation Format(s)

Metallic Porous Iron Nitride and Tantalum Nitride Single Crystals with Enhanced Electrocatalysis Performance. / Zhang, Feiyan; Xi, Shaobo; Lin, Guoming et al.
In: Advanced Materials, Vol. 31, No. 7, 1806552, 15.02.2019.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review