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Main Title: Fabrication of a Robust PEM Water Electrolyzer Based on Non‐Noble Metal Cathode Catalyst: [Mo3S13]2− Clusters Anchored to N‐Doped Carbon Nanotubes
Author(s): Holzapfel, Peter K. R.
Bühler, Melanie
Escalera‐López, Daniel
Bierling, Markus
Speck, Florian D.
Mayrhofer, Karl J. J.
Cherevko, Serhiy
Pham, Chuyen V.
Thiele, Simon
Type: Article
Abstract: High investment costs and a dependence on noble metal catalysts currently obstruct the large‐scale implementation of proton exchange membrane water electrolyzers (PEMWEs) for converting fluctuating green electricity into chemical energy via water splitting. In this context, this work presents a high‐performing and stable non‐noble metal catalyst for the hydrogen evolution reaction (HER), consisting of [Mo3S13]2− clusters supported on nitrogen doped carbon nanotubes (NCNTs). Strikingly, a significant electrochemically induced activation of the Mo3S13‐NCNT catalyst at high current densities is observed in full cell configuration, enabling a remarkable current density of 4 A cm−2 at a cell voltage of 2.36 V. To the authors’ knowledge, this is the highest reported value to date for a PEMWE full cell using a non‐noble metal HER catalyst. Furthermore, only a minor degradation of 83 µV h−1 is observed during a stability test of 100 h constant current at 1 A cm−2, with a nearly unchanged polarization behavior after the current hold. Catalyst stability and activity are additionally analyzed via online dissolution measurements. X‐ray photoelectron spectroscopy examination of the catalyst before and after electrochemical application reveals a correlation between the electrochemical activation occurring via electrodissolution with changes in the molecular structure of the Mo3S13‐NCNT catalyst.
Subject(s): hydrogen evolution reaction
molybdenum sulfide
non‐noble metal catalysts
porous transport electrodes
proton exchange membrane water electrolysis
Issue Date: 16-Aug-2020
Date Available: 16-Dec-2020
Language Code: en
DDC Class: 620 Ingenieurwissenschaften und zugeordnete Tätigkeiten
Sponsor/Funder: BMBF, 03SF0536F, Verbundvorhaben PowerMEE: Lebensdauer- und Leistungserhöhung (POWER) von Polymerelektrolytmembranelektrolyseuren durch Hochleistungsmembranelektrodeneinheiten (MEE) - Teilprojekt: Herstellung von Membran Elektrodeneinheiten und tomographische Analyse
BMBF, 03SF0536E, Verbundvorhaben PowerMEE: Entwicklung von Herstellungsverfahren für Katalysatorschichten mit geringen Beladungen in PEM Elektrolyseuren
EC/H2020/721065/EU/Critical Raw materials Elimination by a top-down Approach To hydrogen and Electricity generation/CREATE
Journal Title: Small
Publisher: Wiley
Volume: 16
Issue: 37
Article Number: 2003161
Publisher DOI: 10.1002/smll.202003161
EISSN: 1613-6829
ISSN: 1613-6810
TU Affiliation(s): Fak. 3 Prozesswissenschaften » Inst. Technischen Umweltschutz » FG Technischer Umweltschutz / Sustainable Engineering
Appears in Collections:Technische Universität Berlin » Publications

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