Journal
JOURNAL OF ENERGY CHEMISTRY
Volume 58, Issue -, Pages 256-263Publisher
ELSEVIER
DOI: 10.1016/j.jechem.2020.10.016
Keywords
PdNiP; Multifunctional catalyst; Phosphorization; Small molecule electro-oxidation; Hydrogen evolution
Funding
- China Scholarship Council, China [201806150015]
- Portuguese Foundation of Science and Technology [02/SAICT/2017/028837]
- National Innovation Agency of Portugal [POCI-01-0247FEDER-046109]
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A simple phosphorization treatment can greatly enhance the electrocatalytic performance of palladium-nickel catalysts in direct liquid fuel cells and water electrolyzers, showing substantial promise for large-scale applications.
The small organic molecule electro-oxidation (OMEO) and the hydrogen evolution (HER) are two important half-reactions in direct liquid fuel cells (DLFCs) and water electrolyzers, respectively, whose performance is largely hindered by the low activity and poor stability of electrocatalysts. Herein, we demonstrate that a simple phosphorization treatment of commercially available palladium-nickel (PdNi) catalysts results in multifunctional ternary palladium nickel phosphide (PdNiP) catalysts, which exhibit substantially enhanced electrocatalytic activity and stability for HER and OMEO of a number of molecules including formic acid, methanol, ethanol, and ethylene glycol, in acidic and/or alkaline media. The improved performance results from the modification of electronic structure of palladium and nickel by the introduced phosphorus and the enhanced corrosion resistance of PdNiP. The simple phosphorization approach reported here allows for mass production of highly-active OMEO and HER electrocatalysts, holding substantial promise for their large-scale application in direct liquid fuel cells and water electrolyzers. (C) 2020 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by ELSEVIER B.V. and Science Press. All rights reserved.
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