Title of Paper:Highly Efficient and Robust MoS2 Nanoflake-Modified-TiN-Ceramic-Membrane Electrode for Electrocatalytic Hydrogen Evolution Reaction

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Affiliation of Author(s):[1] CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Anhui, Hefei, 230026, China; [2] New Energy Research Center, Research Institute of Petroleum Exploration & Development [RIPED], PetroChina, Beijing, 100083, China; [3] School of Materials Science and Engineering, He’nan Key Laboratory of Special Protective Materials, Luoyang Institute of Science and Technology, Henan, Luoyang, 471023, China; [4] School of Energy Science and Engineering, University of Electronic Science and Technology of China, 2006 Xiyuan Road, Chengdu, 611731, China; [5] CAS Key Laboratory of Mechanical Behaviors and Design of Materials, Department of Modern Mechanics, University of Science and Technology of China, Anhui, Hefei, 230026, China; [6] Department of Materials Science and Engineering, University of Ioannina, Ioannina, GR-45110, Greece

Journal:ACS Applied Energy Materials

Key Words:Membranes - Hydrogen production - Charge transfer - Electrocatalysis - Molybdenum disulfide - Pore structure - Binders - Electrocatalysts - Ceramic materials - Layered semiconductors - Titanium nitride

Abstract:Electrode design and fabrication are of major importance for hydrogen evolution reaction applications, as far as high-efficiency and low-cost production of hydrogen are concerned. This paper reports on a titanium-nitride-ceramic-membrane electrode modified by MoS2nanoflakes. Porous TiN-ceramic membranes were fabricated by phase-inversion tape-casting, followed by pressureless sintering. The as-prepared TiN membranes contained straight finger-like pores with an average diameter of 80 μm and smaller pores with an average diameter of 1-3 μm. Then, MoS2nanoflakes were perpendicularly, densely, and uniformly grown on the surface of the TiN grains through the one-pot hydrothermal method. The optimized MoS2/TiN membrane electrode displayed a low overpotential of 113 mV at 10 mA cm-2, a Tafel slope of 78 mV dec-1, a small charge transfer resistance of 1.44 Ω, and a high double-layer capacitance of 504 mF cm-2. It also exhibited excellent stability with slight degradation after 80 h testing at an overpotential of 150 mV in 0.5 M H2SO4. The high conductivity of the TiN substrate, the similar chemical bonds, which favored the rapid electron transfer between MoS2and TiN, the abundant exposed active sites of MoS2nanoflakes, and the unique dual-pore structure resulted in the above superior electrocatalytic activity. The proposed successful utilization of conventional ceramic-membrane technology to prepare electrocatalysts based on membrane electrodes has potential for large-scale application in industrial hydrogen production. ? 2021 American Chemical Society

Document Type:Journal article (JA)

Volume:4

Issue:7

Page Number:6730-6739

ISSN No.:25740962

Translation or Not:no