Metalloporphyrin-modified semiconductors for solar fuel production

D. Khusnutdinova, A. M. Beiler, B. L. Wadsworth, S. I. Jacob, Gary Moore

Research output: Contribution to journalArticlepeer-review

45 Scopus citations

Abstract

We report a direct one-step method to chemically graft metalloporphyrins to a visible-light-absorbing gallium phosphide semiconductor with the aim of constructing an integrated photocathode for light activating chemical transformations that include capturing, converting, and storing solar energy as fuels. Structural characterization of the hybrid assemblies is achieved using surface-sensitive spectroscopic methods, and functional performance for photoinduced hydrogen production is demonstrated via three-electrode electrochemical testing combined with photoproduct analysis using gas chromatography. Measurements of the total per geometric area porphyrin surface loadings using a cobalt-porphyrin based assembly indicate a turnover frequency ≥3.9 H2 molecules per site per second, representing the highest reported to date for a molecular-catalyst-modified semiconductor photoelectrode operating at the H+/H2 equilibrium potential under 1-sun illumination.

Original languageEnglish (US)
Pages (from-to)253-259
Number of pages7
JournalChemical Science
Volume8
Issue number1
DOIs
StatePublished - 2016

ASJC Scopus subject areas

  • Chemistry(all)

Fingerprint Dive into the research topics of 'Metalloporphyrin-modified semiconductors for solar fuel production'. Together they form a unique fingerprint.

Cite this