Unraveling the Intermediate Species of Co₃O₄ Hollow Spheres for CO₂ Photoreduction by In Situ X-ray Absorption Spectroscopy

Authors

Peilei He, Marquette UniversityFollow
Sizhou Yang, Marquette UniversityFollow
Wenhui Hu, Marquette University
Sungsik Lee, Argonne National Laboratory
Jier Huang, Marquette UniversityFollow

Document Type

Article

Language

eng

Publication Date

2-2020

Publisher

American Chemical Society

Source Publication

Journal of Physical Chemistry C

Source ISSN

1932-7447

Abstract

Nanostructured hollow materials have emerged as a promising class of materials for energy conversion and storage. In this work, we report a Co₃O₄ hollow sphere nanostructure that can serve as a CO₂ reduction catalyst to form CO with high selectivity upon visible-light illumination in the presence of a [Ru(bpy)₃]²⁺ molecular photosensitizer. Using in situ X-ray absorption spectroscopy, we not only showed that the Co center in the Co₃O₄ hollow sphere is the active site for CO₂ reduction but also identified a key intermediate species, that is, a reduced Co center, due to electron transfer from the [Ru(bpy)₃]²⁺ photosensitizer when the system can steadily generate CO.

Comments

Accepted version. Journal of Physical Chemistry C, Vol. 124, No. 11 (February 2020): 6215-6220. DOI. © 2020 American Chemical Society. Used with permission.

Recommended Citation

He, Peilei; Yang, Sizhou; Hu, Wenhui; Lee, Sungsik; and Huang, Jier, "Unraveling the Intermediate Species of Co₃O₄ Hollow Spheres for CO₂ Photoreduction by In Situ X-ray Absorption Spectroscopy" (2020). Chemistry Faculty Research and Publications. 1029.
https://epublications.marquette.edu/chem_fac/1029