Metal-Organic Framework Thin Films as Platforms for Atomic Layer Deposition of Cobalt Ions To Enable Electrocatalytic Water Oxidation

Chung-Wei Kung; Joseph E Mondloch; Timothy C Wang; Wojciech Bury; William Hoffeditz; Benjamin M Klahr; Rachel C Klet; Michael J Pellin; Omar K Farha; Joseph T Hupp

doi:10.1021/acsami.5b06901

Metal-Organic Framework Thin Films as Platforms for Atomic Layer Deposition of Cobalt Ions To Enable Electrocatalytic Water Oxidation

ACS Appl Mater Interfaces. 2015 Dec 30;7(51):28223-30. doi: 10.1021/acsami.5b06901. Epub 2015 Dec 18.

Authors

Chung-Wei Kung^{1

2}, Joseph E Mondloch¹, Timothy C Wang¹, Wojciech Bury^{1

3}, William Hoffeditz^{1

4}, Benjamin M Klahr^{1

4}, Rachel C Klet¹, Michael J Pellin⁴, Omar K Farha^{1

5}, Joseph T Hupp^{1

4}

Affiliations

¹ Department of Chemistry, Northwestern University , 2145 Sheridan Road, Evanston, Illinois 60208, United States.
² Department of Chemical Engineering, National Taiwan University , No. 1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan.
³ Department of Chemistry, Warsaw University of Technology , Noakowskiego 3, 00-664 Warsaw, Poland.
⁴ Argonne National Laboratory , 9700 South Cass Avenue, Argonne, Illinois 60439, United States.
⁵ Department of Chemistry, Faculty of Science, King Abdulaziz University , Jeddah, Saudi Arabia.

PMID: 26636174
DOI: 10.1021/acsami.5b06901

Abstract

Thin films of the metal-organic framework (MOF) NU-1000 were grown on conducting glass substrates. The films uniformly cover the conducting glass substrates and are composed of free-standing sub-micrometer rods. Subsequently, atomic layer deposition (ALD) was utilized to deposit Co(2+) ions throughout the entire MOF film via self-limiting surface-mediated reaction chemistry. The Co ions bind at aqua and hydroxo sites lining the channels of NU-1000, resulting in three-dimensional arrays of separated Co ions in the MOF thin film. The Co-modified MOF thin films demonstrate promising electrocatalytic activity for water oxidation.

Keywords: atomic layer deposition; cobalt oxide; electrocatalyst; metal−organic frameworks; pyrene; water oxidation.

Publication types

Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, Non-P.H.S.