Thin film catalysts: Ni5P4 (Cathodic) and LiCoO2 (Anodic) for electrolysis of water

S. Hwang, S. H. Porter, G. Gardner, A. B. Laursen, H. Wang, M. Li, V. Amarasinghe, E. Taghaddos, A. Safari, E. Garfunkel, M. Greenblatt, G. C. Dismukes

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)


Inexpensive earth-abundant catalysts are required to accelerate both the oxidative and reductive half reactions for electrolysis of water. Using natural enzymes as models, such as the CaMn4O5 cubane motif in the water oxidizing complex of photosystem II and the Ni-S active site of Ni-Fe hydrogenase, we previously developed cubic LiCoO2 (1) and nickel phosphides that mimic their chemistry, respectively (2). Here we prepared thin films of spinel - LiCo2O4, for the (water oxidation) oxygen evolving reaction (OER), and Ni5P4, for the hydrogen evolving reaction (HER) on Au substrates. We investigated their atomic structure (PXRD), Raman vibrational modes, surface morphology (SEM, AFM), core electronic levels (XPS), and electrochemical catalytic performance. These non-precious metal thin film materials function as well as the individual nanocrystalline particles and are expected to be applicable to use in monolithic photoelectrochemical cells and potentially fuel cells.

Original languageEnglish
Title of host publicationHydrogen and Oxygen Evolution Catalysis for Water Electrolysis 2
EditorsH. Xu, Y. Shao-Horn, V. K. Ramani, P. J. Kulesza
PublisherElectrochemical Society Inc.
Number of pages21
ISBN (Electronic)9781607687504
ISBN (Print)9781623323929
Publication statusPublished - 2016
EventSymposium on Hydrogen and Oxygen Evolution Catalysis for Water Electrolysis 2 - 229th ECS Meeting - San Diego, United States
Duration: May 29 2016Jun 2 2016

Publication series

NameECS Transactions
ISSN (Print)1938-6737
ISSN (Electronic)1938-5862


OtherSymposium on Hydrogen and Oxygen Evolution Catalysis for Water Electrolysis 2 - 229th ECS Meeting
CountryUnited States
CitySan Diego

ASJC Scopus subject areas

  • Engineering(all)

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