# Dual-Atom Co/Ni Electrocatalyst Anchored at the Surface-Modified Ti<sub>3</sub>C<sub>2</sub>T<sub>  <i>x</i></sub> MXene Enables Efficient Hydrogen and Oxygen Evolution Reactions

https://mdr.nims.go.jp/datasets/60ab424f-db7b-40e4-b89e-3638edeeb4af

## File

- [Xin manuscript 0116.docx](https://mdr.nims.go.jp/filesets/18b586ff-21e2-4a22-b83c-b3c251036111/download) ([Detail](https://mdr.nims.go.jp/filesets/18b586ff-21e2-4a22-b83c-b3c251036111.md))
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## Id

60ab424f-db7b-40e4-b89e-3638edeeb4af

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2024-08-10T10:04:56.846210Z

## Updated at

2025-01-24T23:30:15.726932Z

## Published at

2025-01-24T23:30:16.934847Z

## Doi

https://doi.org/10.48505/nims.4686

## First published url

https://doi.org/10.1021/acsnano.3c09639

## Date published

2024-02-06

## Recorded date published

2024-2-6

## Resource type

journal_article

## Manuscript type

accepted_manuscript

## Collection



## Title

- title: Dual-Atom Co/Ni Electrocatalyst Anchored at the Surface-Modified Ti<sub>3</sub>C<sub>2</sub>T<sub><i>x</i></sub>
    MXene Enables Efficient Hydrogen and Oxygen Evolution Reactions
  title_type: original
  lang: en

## Description

- description: Dual-atom catalytic sites on conductive substrates offer a promising
    opportunity for accelerating the kinetics of multistep hydrogen and oxygen evolution
    reactions (HER and OER, respectively). Using MXenes as substrates is a promising
    strategy for depositing those dual-atom electrocatalysts, if the efficient surface
    anchoring strategy ensuring metal-substrate interactions and sufficient mass loading
    is established. We introduce a surface-modification strategy of MXene substrates
    by preadsorbing L-tryptophan molecules, which enabled attachment of dual-atom
    Co/Ni electrocatalyst at the surface of Ti3C2Tx by forming N-Co/Ni-O bonds, with
    mass loading reaching as high as 5.6 wt %. The electron delocalization resulting
    from terminated O atoms on MXene substrates, N atoms in L-tryptophan anchoring
    moieties, and catalytic metal atoms Co and Ni provides an optimal adsorption strength
    of intermediates and boosts the HER and OER kinetics, thereby notably promoting
    the intrinsic activity of the electrocatalyst. CoNi-Ti3C2Tx electrocatalyst displayed
    HER and OER overpotentials of 31 and 241 mV at 10 mA cm-2, respectively. Importantly,
    the CoNi-Ti3C2Tx electrocatalyst also exhibited high operational stability for
    both OER and HER over 100 h at an industrially relevant current density of 500
    mA cm-2. Our study provided guidance for constructing dual-atom active metal sites
    on MXene substrates to synergistically enhance the electrochemical efficiency
    and stability of the energy conversion and storage systems.
  description_type: abstract
  lang: und

## Creator

- name: Xin Zhao
  role: author
- name: Wan-Peng Li
  role: author
- name: Yanhui Cao
  role: author
- name: Arsenii Portniagin
  role: author
- name: Bing Tang
  role: author
- name: Shixun Wang
  role: author
- name: Qi Liu
  role: author
- name: Denis Y. W. Yu
  role: author
  orcid: https://orcid.org/0000-0002-5883-7087
  organization: National Institute for Materials Science
- name: Xiaoyan Zhong
  role: author
- name: Xuerong Zheng
  role: author
- name: Andrey L. Rogach
  role: author

## Contact agent



## Publisher

organization: American Chemical Society (ACS)

## Managing organization



## Keyword

- subject: dual-atom electrocatalyst
  schema: not_defined
- subject: MXene substrate
  schema: not_defined
- subject: oxygen evolution reaction
  schema: not_defined
- subject: hydrogen evolution reaction
  schema: not_defined
- subject: anchor L-tryptophan molecules
  schema: not_defined

## Rights

- description: This document is the Accepted Manuscript version of a Published Work
    that appeared in final form in ACS Nano, copyright © 2024 American Chemical Society
    after peer review and technical editing by the publisher. To access the final
    edited and published work see https://doi.org/10.1021/acsnano.3c09639
  identifier: http://rightsstatements.org/vocab/InC/1.0/

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo

start_date: 2024-01-24
end_date: 2025-01-24

## Journal

- title: ACS Nano
  issn: 1936086X
  volume: '18'
  issue: '5'
  start_page: 4256
  end_page: 4268

## Conference



## Related item



## Funding

- identifier: U23A200767
  funder_name: National Natural Science Foundation of China
- identifier: '52177220'
  funder_name: National Natural Science Foundation of China
- identifier: XJ2020001
  funder_name: Hong Kong Scholar Program
- identifier: ARG01-0524-230315
  funder_name: Qatar Research Development and Innovation Council

## Instrument



## Instrument operator



## Instrument managing organization



## Measurement method



## Specimen



## Chemical composition



## Structure for specimen



## Structural feature for specimen



## Specific property for specimen



## Process for specimen treatment



## Computational method



## Energy level/transition state



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## Fileset

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  filename: Xin manuscript 0116.docx
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  size: 5743623
  md5: ae1db1ea79321a0bd94bb03931c096fa
- id: 7ee4c633-ac33-44d0-875b-5a0c88d92d8e
  filename: Xin SI 0116.docx
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  size: 4958900
  md5: 23263198a6fd010d1ceeb9a4d25ffcd6

## Thumbnail

fileset_id: 18b586ff-21e2-4a22-b83c-b3c251036111
filename: Xin manuscript 0116.docx