# Atomic cation vacancy engineering of NiFe-LDH nanosheets towards oxygen evolution reaction

https://mdr.nims.go.jp/datasets/b8952b96-8fdb-4f89-a704-080b8a29a5ed

## File

- [Abstracts.pdf](https://mdr.nims.go.jp/filesets/5cee6d15-109d-4b8f-ac0d-7ecca2c2738f/download) ([Detail](https://mdr.nims.go.jp/filesets/5cee6d15-109d-4b8f-ac0d-7ecca2c2738f.md))

## Id

b8952b96-8fdb-4f89-a704-080b8a29a5ed

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2024-10-22T11:25:35.716306Z

## Updated at

2024-10-23T03:30:19.957794Z

## Published at

2024-10-23T03:30:21.208322Z

## Doi

https://doi.org/10.48505/nims.4881

## First published url



## Date published



## Recorded date published



## Resource type

conference_poster

## Manuscript type

na

## Collection



## Title

- title: Atomic cation vacancy engineering of NiFe-LDH nanosheets towards oxygen evolution
    reaction
  title_type: original
  lang: en

## Description

- description: "Electrochemical oxygen evolution reaction (OER) is the efficiency-determining
    process of water splitting, which is considered one of the most promising strategies
    for generating hydrogen. Although some progress has been made in the development
    of transition metal-based OER catalysts, most are still inferior to their noble
    metal counterparts. Another drawback is that most of them cannot be used as bifunctional
    electrocatalysts for both OER and hydrogen evolution reaction (HER). Layered double
    hydroxides based on Ni and Fe (NiFe LDH) have been reported to exhibit relatively
    high OER activity, while the enhancement of intrinsic activity and specific surface
    area is still needed to further improve the catalytic performance. In our previous
    work, efficient strategies such as morphology design, composition tuning, and
    heterostructure were explored to meet the needs. Recently, vacancy engineering
    has been proposed to be a promising protocol for improving the electrocatalytic
    activity of transition metal LDHs.\r\nIn the current work, Ni2+-Fe3+ LDHs were
    synthesized using a homogeneous precipitation method in the presence of hexamethylenetetramine
    (HMT, C6H12N4) and anthraquinone-2-sulfonate (AQS, C14H7O5S-). Herein, doping
    with a designated amount of Zn2+ into Ni2+-Fe3+ LDHs was carried out. After successfully
    exfoliating the bulk Ni2-x/3Znx/3Fe1/3 LDHs (x = 0-0.2) into single-layer nanosheets,
    vacancies were generated through chemical etching out Zn2+ in a NaOH solution.
    The NiVFe-LDH nanosheets was then flocculated with anionic CO32- to produce catalysts
    in powder form for OER measurements. The results show that vacancies in the resultant
    NiVFe-LDH nanosheets help significantly improve the intrinsic activity for OER.
    Furthermore, these nanosheets can be hetero-assembled with HER-active molybdenum
    disulfide (MoS2) nanosheets to serve as a bifunctional catalyst for water splitting."
  description_type: abstract
  lang: eng

## Creator

- name: Huanran Li
  role: author
  orcid: https://orcid.org/0009-0005-6008-6779
  organization: National Institute for Materials Science
  department: Research Center for Materials Nanoarchitectonics (MANA)/Nanomaterials
    Field/Functional Nanomaterials Group
  ror: https://ror.org/026v1ze26
- name: Yoshiyuki Sugahara
  role: author
  organization: Waseda Univeristy
- name: Takayoshi Sasaki
  role: author
  orcid: https://orcid.org/0000-0002-2872-0427
  organization: National Institute for Materials Science
  department: Research Center for Materials Nanoarchitectonics (MANA)/Nanomaterials
    Field/Soft Chemistry Group
  ror: https://ror.org/026v1ze26
- name: Renzhi Ma
  role: author
  orcid: https://orcid.org/0000-0001-7126-2006
  organization: National Institute for Materials Science
  department: Research Center for Materials Nanoarchitectonics (MANA)/Nanomaterials
    Field/Functional Nanomaterials Group
  ror: https://ror.org/026v1ze26

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## Keyword

- subject: vacancy
  schema: not_defined

## Rights

- identifier: http://rightsstatements.org/vocab/InC/1.0/

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## Data origin

- data_origin_type: other

## Embargo



## Journal



## Conference

name: MANA International Symposium 2023
start_date: 2023-11-09
end_date: 2023-11-10
identifier: https://www.nims.go.jp/mana/2023/index.html

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## Fileset

- id: 5cee6d15-109d-4b8f-ac0d-7ecca2c2738f
  filename: Abstracts.pdf
  content_type: application/pdf
  size: 431076
  md5: 3902b03ee3017405c8a3c57bb714ba22

## Thumbnail

fileset_id: 5cee6d15-109d-4b8f-ac0d-7ecca2c2738f
filename: Abstracts.pdf