Coupling a Low Loading of IrP, PtP, or PdP with Heteroatom-Doped Nanocarbon for Overall Water-Splitting Cells and Zinc-Air Batteries.

Authors:
Qing Qin
Qing Qin
Cancer Center
Ann Arbor | United States
Haeseong Jang
Haeseong Jang
School of Energy and Chemical Engineering
Cambridge | United States
Lulu Chen
Lulu Chen
University of California
United States
Ping Li
Ping Li
Fujian Medical University Union Hospital
Fuzhou Shi | China
Tao Wei
Tao Wei
College of Life Sciences
Provo | United States
Xien Liu
Xien Liu
University Park
United States
Jaephil Cho
Jaephil Cho
Interdisciplinary School of Green Energy
South Korea

ACS Appl Mater Interfaces 2019 May 26;11(18):16461-16473. Epub 2019 Apr 26.

Department of Energy Engineering and School of Energy and Chemical Engineering , Ulsan National Institute of Science and Technology (UNIST) , Ulsan 689-798 , South Korea.

Noble metal-based catalysts are currently the most advanced electrocatalysts for many applications, such as for energy conversion and for chemical industry. Because of the high cost and scarcity of noble metals, reducing the usage is a practical way to achieve scalable applications. Herein, for the first time, three novel electrocatalysts composed of noble metal phosphide (IrP, PdP, or PtP) nanoparticles with N,P-codoped nanocarbon were synthesized by the pyrolysis of mixtures of IrCl, PdCl, or PtCl with phytic acid under an ammonia atmosphere. With an ultralow loading of Pd (1.5 μg), Pt (1.4 μg), or Ir (1.6 μg) on the electrode, the PdP/NPC, PtP/NPC, and IrP/NPC catalysts, respectively, exhibited excellent trifunctional catalytic activities for the oxygen reduction reaction, hydrogen evolution reaction, and oxygen evolution reaction. Notably, the IrP/NPC-, PdP/NPC-, and PtP/NPC-based water-splitting cells required only 1.62, 1.65, and 1.68 V, respectively, to deliver the current density of 10 mA cm. Furthermore, the IrP/NPC-, PdP/NPC-, and PtP/NPC-based zinc-air batteries exhibited higher specific capacities than that of Pt/C. IrP/NPC exhibited a comparable performance to that of Pt/C-IrO for use in rechargeable zinc-air batteries.

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Source
http://dx.doi.org/10.1021/acsami.8b21155DOI Listing
May 2019
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