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Title: Enhancement of oxygen reduction reaction activities by Pt nanoclusters decorated on ordered mesoporous porphyrinic carbons

Journal Article · · Journal of Materials Chemistry. A
DOI:https://doi.org/10.1039/c5ta09915c· OSTI ID:1302999
 [1];  [2];  [3];  [4];  [5];  [3];  [6];  [6];  [6];  [3]
  1. SABIC Technology Center, Riyadh (Saudi Arabia)
  2. Pohang Accelerator Lab. (PAL) (Korea, Republic of)
  3. Korea Inst. of Energy Research (KIER), Daejeon (South Korea). Fuel Cell Lab.
  4. Ulsan National Inst. of Science and Technology (UNIST), Ulsan (South Korea). Dept. of Chemistry
  5. Ulsan National Inst. of Science and Technology (UNIST), Ulsan (South Korea). Dept. of Chemistry; Ulsan National Inst. of Science and Technology (UNIST), Ulsan (South Korea). School of Engineering
  6. Brookhaven National Lab. (BNL), Upton, NY (United States). Dept. of Chemistry

The high cost of Pt-based membrane electrode assemblies (MEAs) is a critical hurdle for the commercialization of polymer electrolyte fuel cells (PEFCs). Recently, non-precious metal-based catalysts (NPMCs) have demonstrated much enhanced activity but their oxygen reduction reaction (ORR) activity is still inferior to that of Pt-based catalysts resulting in a much thicker electrode in the MEA. For the reduction of mass transport and ohmic overpotential we adopted a new concept of catalyst that combines an ultra-low amount of Pt nanoclusters with metal–nitrogen (M–Nx) doped ordered mesoporous porphyrinic carbon (FeCo–OMPC(L)). The 5 wt% Pt/FeCo–OMPC(L) showed a 2-fold enhancement in activities compared to a higher loading of Pt. Our experimental results supported by first-principles calculations indicate that a trace amount of Pt nanoclusters on FeCo–OMPC(L) significantly enhances the ORR activity due to their electronic effect as well as geometric effect from the reduced active sites. Finally, in terms of fuel cell commercialization, this class of catalysts is a promising candidate due to the limited use of Pt in the MEA.

Research Organization:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC00112704; AC02-05CH11231
OSTI ID:
1302999
Report Number(s):
BNL-112405-2016-JA; R&D Project: MA510MAEA; KC0302010
Journal Information:
Journal of Materials Chemistry. A, Vol. 4, Issue 16; ISSN 2050-7488
Publisher:
Royal Society of ChemistryCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 15 works
Citation information provided by
Web of Science

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Cited By (2)

Stabilization of Iron-Based Fuel Cell Catalysts by Non-Catalytic Platinum journal January 2018
Oxygen Reduction Reaction Catalyzed by Noble Metal Clusters journal February 2018