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)

Abstract

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
EditorsY. Shao-Horn, P. J. Kulesza, H. Xu, V. K. Ramani
PublisherElectrochemical Society Inc.
Pages31-51
Number of pages21
Edition23
ISBN (Electronic)9781607685395
DOIs
Publication statusPublished - Jan 1 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
Number23
Volume72
ISSN (Print)1938-5862
ISSN (Electronic)1938-6737

Other

OtherSymposium on Hydrogen and Oxygen Evolution Catalysis for Water Electrolysis 2 - 229th ECS Meeting
CountryUnited States
CitySan Diego
Period5/29/166/2/16

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ASJC Scopus subject areas

  • Engineering(all)

Cite this

Hwang, S., Porter, S. H., Gardner, G., Laursen, A. B., Wang, H., Li, M., Amarasinghe, V., Taghaddos, E., Safari, A., Garfunkel, E., Greenblatt, M., & Dismukes, G. C. (2016). Thin film catalysts: Ni5P4 (Cathodic) and LiCoO2 (Anodic) for electrolysis of water. In Y. Shao-Horn, P. J. Kulesza, H. Xu, & V. K. Ramani (Eds.), Hydrogen and Oxygen Evolution Catalysis for Water Electrolysis 2 (23 ed., pp. 31-51). (ECS Transactions; Vol. 72, No. 23). Electrochemical Society Inc.. https://doi.org/10.1149/07223.0031ecst