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Journal article
Stoichiometry and surface structure dependence of hydrogen evolution reaction activity and stability of MoxC MXenes
Journal of catalysis, v 371, pp 325-332
Mar 2019
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
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•HER activity on MoxCTz MXenes is strongly surface structural dependent.•Mo2CTz is more active for HER than Mo1.33CTz possessing order divacancies on the surface.•Oxidation of MoxCTz at cathodic conditions leads to decay in activity during accelerated durability testing.•MoxCTz MXenes have pH universal HER activity.
The exploration of non-precious catalysts for the hydrogen evolution reaction (HER) remains critical in the commercialization of electrochemical energy storage and conversion technologies. Two-dimensional transitional metal carbides called MXenes have been found to have great potential as electrocatalysts for HER. In this work, we synthesize two molybdenum-based MXenes: Mo1.33CTz and Mo2CTz and measure their HER activity and operational durability. The ordered divacancies on the basal planes of Mo1.33CTz cause a marked decrease in HER activity compared to Mo2CTz. The stoichiometry and atomic surface structure of MXenes is found to be critically important for catalytic activity while having less of an impact on operational durability. This work provides insight for the development of active 2D materials, in general and MXenes in particular for HER and other technologically relevant electrochemical reactions.
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Details
- Title
- Stoichiometry and surface structure dependence of hydrogen evolution reaction activity and stability of MoxC MXenes
- Creators
- Saad Intikhab - Drexel UniversityVarun Natu - Drexel UniversityJustin Li - Drexel UniversityYawei Li - Drexel UniversityQuanzheng Tao - Linköping UniversityJohanna Rosen - Linköping UniversityMichel W. Barsoum - Drexel UniversityJoshua Snyder - Drexel University
- Publication Details
- Journal of catalysis, v 371, pp 325-332
- Publisher
- Elsevier
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering; Chemical and Biological Engineering
- Web of Science ID
- WOS:000466251300036
- Scopus ID
- 2-s2.0-85061983932
- Other Identifier
- 991019168617604721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Chemistry, Physical
- Engineering, Chemical