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Title: Durable and self-hydrating tungsten carbide-based composite polymer electrolyte membrane fuel cells

Journal Article · · Nature Communications
 [1]; ORCiD logo [2];  [3];  [1];  [2];  [2];  [1];  [1]
  1. Univ. of Delaware, Newark, DE (United States). Dept. of Chemical and Biomolecular Engineering and Catalysis Center for Energy Innovation and Center for Catalytic Science and Technology
  2. Univ. of Delaware, Newark, DE (United States). Dept. of Mechanical Engineering and Center for Full Cell Research
  3. Univ. of Delaware, Newark, DE (United States). Dept. of Materials Science and Engineering

Proton conductivity of the polymer electrolyte membranes in fuel cells dictates their performance and requires sufficient water management. Here, we report a simple, scalable method to produce well-dispersed transition metal carbide nanoparticles. We demonstrate that these, when added as an additive to the proton exchange Nafion membrane, provide significant enhancement in power density and durability over 100 hours, surpassing both the baseline Nafion and platinum-containing recast Nafion membranes. Using focused ion beam/scanning electron microscope tomography reveals the key membrane degradation mechanism. Density functional theory exposes that OH• and H• radicals adsorb more strongly from solution and reactions producing OH• are significantly more endergonic on tungsten carbide than on platinum. Consequently, tungsten carbide may be a promising catalyst in self-hydrating crossover gases while retarding desorption of and capturing free radicals formed at the cathode, resulting in enhanced membrane durability.

Research Organization:
Univ. of Delaware, Newark, DE (United States); Energy Frontier Research Centers (EFRC) (United States). Catalysis Center for Energy Innovation (CCEI)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0001004
OSTI ID:
1425195
Journal Information:
Nature Communications, Vol. 8, Issue 1; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 38 works
Citation information provided by
Web of Science

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Cited By (7)

Bis-imidazolium based poly(phenylene oxide) anion exchange membranes for fuel cells: the effect of cross-linking journal January 2019
Planar polymer electrolyte membrane fuel cells: powering portable devices from hydrogen journal January 2020
Graphitized Carbon: A Promising Stable Cathode Catalyst Support Material for Long Term PEMFC Applications journal May 2018
Rh/Ce 0.25 Zr 0.75 O 2 Catalyst for Steam Reforming of Propane at Low Temperature journal February 2019
High‐Performance Solid Polymer Electrolytes Filled with Vertically Aligned 2D Materials journal February 2019
Rapid synthesis of size-tunable transition metal carbide nanodots under ambient conditions journal January 2019
Room‐Temperature Sustainable Synthesis of Selected Platinum Group Metal (PGM = Ir, Rh, and Ru) Nanocatalysts Well‐Dispersed on Porous Carbon for Efficient Hydrogen Evolution and Oxidation journal October 2019