Journal article
Enhancing Hydrogen Evolution Reaction Activity of Palladium Catalyst by Immobilization on MXene Nanosheets
ACS nano, v 18(8), pp 6243-6255
12 Feb 2024
PMID: 38345597
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Efficient catalysts with minimal content of catalytically active noble metals are essential for the transition to the clean hydrogen economy. Catalyst supports that can immobilize and stabilize catalytic nanoparticles and facilitate the supply of electrons and reactants to the catalysts are needed. Being hydrophilic and more conductive compared with carbons, MXenes have shown promise as catalyst supports. However, the controlled assembly of their 2D sheets creates a challenge. This study established a lattice engineering approach to regulate the assembly of exfoliated Ti
C
T
MXene nanosheets with guest cations of various sizes. The enlargement of guest cations led to a decreased interlayer interaction of MXene lamellae and increased surface accessibility, allowing intercalation of Pd nanoparticles. Stabilization of Pd nanoparticles between interlayer-expanded MXene nanosheets improved their electrocatalytic activity. The Pd-immobilized K
-intercalated MXene nanosheets (PdKMX) demonstrated exceptional electrocatalytic performance for the hydrogen evolution reaction with the lowest overpotential of 72 mV (@10 mA cm
) and the highest turnover frequency of 1.122 s
(@ an overpotential of 100 mV), which were superior to those of the state-of-the-art Pd nanoparticle-based electrocatalysts. Weakening of the interlayer interaction during self-assembly with K
ions led to fewer layers in lamellae and expansion of the MXene in the
direction during Pd anchoring, providing numerous surface-active sites and promoting mass transport.
spectroscopic analysis suggests that the effective interfacial electron injection from the Pd nanoparticles strongly immobilized on interlayer-expanded PdKMX may be responsible for the improved electrocatalytic performance.
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Details
- Title
- Enhancing Hydrogen Evolution Reaction Activity of Palladium Catalyst by Immobilization on MXene Nanosheets
- Creators
- Yiyang Sun - Yonsei UniversityJihyeong Lee - Yonsei UniversityNam Hee Kwon - Yonsei UniversityJoohyun Lim - Kangwon National UniversityXiaoyan Jin (Corresponding Author) - Yonsei UniversityYury Gogotsi (Corresponding Author) - Drexel UniversitySeong-Ju Hwang (Corresponding Author) - Yonsei University
- Publication Details
- ACS nano, v 18(8), pp 6243-6255
- Publisher
- American Chemical Society (ACS)
- Number of pages
- 13
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Web of Science ID
- WOS:001167202600001
- Scopus ID
- 2-s2.0-85185602427
- Other Identifier
- 991021852272004721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Chemistry, Multidisciplinary
- Chemistry, Physical
- Materials Science, Multidisciplinary
- Nanoscience & Nanotechnology