# Tailored Design of Mesoporous Nanospheres with High Entropic Alloy Sites for Efficient Redox Electrocatalysis

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## File

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## Id

a057c2cb-b2dc-4c9e-a7c4-97e16b3a52a5

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2025-01-20T04:00:30.241073Z

## Updated at

2025-01-24T23:30:48.082817Z

## Published at

2025-01-24T23:30:48.165698Z

## Doi



## First published url

https://doi.org/10.1002/advs.202402518

## Date published

2024-07-19

## Recorded date published

2024-9

## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: Tailored Design of Mesoporous Nanospheres with High Entropic Alloy Sites
    for Efficient Redox Electrocatalysis
  title_type: original
  lang: en

## Description

- description: High Entropy Alloys (HEAs) are a versatile material with unique properties,
    tailored for various applications. They enable pH-sensitive electrocatalytic transformations
    like hydrogen evolution reaction (HER) and hydrogen oxidation reactions (HOR)
    in alkaline media. Mesoporous nanostructures with high surface area are preferred
    for these electrochemical reactions, but designing mesoporous HEA sis challenging.
    To overcome this challenge, a low-temperature triblock copolymer-assisted wet-chemical
    approach is developed to produce mesoporous HEA nanospheres composed of PtPdRuMoNi
    systems with sufficient entropic mixing. Owing to active sites with inherent entropic
    effect, mesoporous features, and increased accessibility, optimized HEA nanospheres
    promote strong HER/HOR performance in alkaline medium. At 30 mV nominal overpotential,
    it exhibits a mass activity of ≈167 (HER) and 151 A gPt−1 (HOR), far exceeding
    commercial Pt-C electrocatalysts (34 and 48 A gPt−1) and many recently reported
    various alloys. The Mott-Schottky analysis reveals HEA nanospheres inherit high
    charge carrier density, positive flat band potential, and smaller charge transfer
    barrier, resulting in better activity and faster kinetics. This micelle-assisted
    synthetic enable the exploration of the compositional and configurational spaces
    of HEAs at relatively low temperature, while simultaneously facilitating the introduction
    of mesoporous nanostructures for a wide range of catalytic applications.
  description_type: abstract
  lang: und

## Creator

- name: Ravi Nandan
  role: author
  organization: National Institute for Materials Science
- name: Hiroki Nara
  role: author
- name: Ho Ngoc Nam
  role: author
- name: Quan Manh Phung
  role: author
- name: Quynh Phuong Ngo
  role: author
- name: Jongbeom Na
  role: author
- name: Joel Henzie
  role: author
  orcid: https://orcid.org/0000-0002-9190-2645
  organization: National Institute for Materials Science
  ror: https://ror.org/026v1ze26
- name: Yusuke Yamauchi
  role: author
  orcid: https://orcid.org/0000-0001-7854-927X
  organization: National Institute for Materials Science

## Contact agent



## Publisher

organization: Wiley

## Managing organization



## Keyword

- subject: High entropy alloy
  schema: not_defined
- subject: hydrogen evolution
  schema: not_defined
- subject: hydrogen oxidation
  schema: not_defined
- subject: Mesoporous
  schema: not_defined

## Rights

- description: This is an open access article under the terms of the Creative Commons
    Attribution License, which permits use, distribution and reproduction in any medium,
    provided the original work is properly cited
  identifier: https://creativecommons.org/licenses/by/4.0/

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: Advanced Science
  issn: '21983844'
  volume: '35'
  issue: '11'
  article_number: '2402518'

## Conference



## Related item



## Funding

- identifier: JPMJER2003
  funder_name: Exploratory Research for Advanced Technology
- identifier: P22063
  funder_name: Japan Society for the Promotion of Science
- funder_name: National Research Foundation of Korea
- funder_name: Nagoya University

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## Fileset

- id: 186a8a63-30e7-4962-a499-46d817f874cd
  filename: Advanced Science - 2024 - Nandan - Tailored Design of Mesoporous Nanospheres
    with High Entropic Alloy Sites for Efficient (4).pdf
  content_type: application/pdf
  size: 5054998
  md5: e53ad3e4b1085396ba7ccafd6471d4c5

## Thumbnail

fileset_id: 186a8a63-30e7-4962-a499-46d817f874cd
filename: Advanced Science - 2024 - Nandan - Tailored Design of Mesoporous Nanospheres
  with High Entropic Alloy Sites for Efficient (4).pdf