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Title: A hard X-ray study of a manganese-terpyridine catalyst in a chromium-based Metal Organic Framework

Abstract

Hydrogen produced from water splitting is a promising source of clean energy. However, a robust catalyst is necessary to carry out the water oxidation step of water splitting. In this study, the catalyst studied was [(terpy)Mn(μ-O)2Mn(terpy)]3+ (MnTD) synthesized in the Metal Organic Framework (MOF) MIL-101(Cr), and the method used for analysis was hard X-ray powder diffraction. The diffraction data was used to detect the presence of MOF in different catalytic stages, and lattice parameters were assigned to the samples containing MOF. Fourier maps were constructed with GSAS II to determine the contents of the MOF as preliminary studies suggested that MnTD may not be present. Results showed that MOF is present before catalysis occurs but disappears by the time 45 minutes of catalysis has ensued. Changes in the MOF’s lattice parameters and location of electron density in the Fourier maps suggest attractions between the MOF and catalyst that may lead to MOF degradation. Fourier maps also revealed limited, if any, amounts of MnTD, even before catalysis occurred. Molecular manganese oxide may be the source of the high rate of water oxidation catalysis in the studied system.

Authors:
 [1]
  1. SLAC National Accelerator Lab., Menlo Park, CA (United States)
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1213115
Report Number(s):
SLAC-TN-15-084
DOE Contract Number:  
AC02-76SF00515
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
OTHER

Citation Formats

Ramsey, Alexandra V. A hard X-ray study of a manganese-terpyridine catalyst in a chromium-based Metal Organic Framework. United States: N. p., 2015. Web. doi:10.2172/1213115.
Ramsey, Alexandra V. A hard X-ray study of a manganese-terpyridine catalyst in a chromium-based Metal Organic Framework. United States. https://doi.org/10.2172/1213115
Ramsey, Alexandra V. 2015. "A hard X-ray study of a manganese-terpyridine catalyst in a chromium-based Metal Organic Framework". United States. https://doi.org/10.2172/1213115. https://www.osti.gov/servlets/purl/1213115.
@article{osti_1213115,
title = {A hard X-ray study of a manganese-terpyridine catalyst in a chromium-based Metal Organic Framework},
author = {Ramsey, Alexandra V.},
abstractNote = {Hydrogen produced from water splitting is a promising source of clean energy. However, a robust catalyst is necessary to carry out the water oxidation step of water splitting. In this study, the catalyst studied was [(terpy)Mn(μ-O)2Mn(terpy)]3+ (MnTD) synthesized in the Metal Organic Framework (MOF) MIL-101(Cr), and the method used for analysis was hard X-ray powder diffraction. The diffraction data was used to detect the presence of MOF in different catalytic stages, and lattice parameters were assigned to the samples containing MOF. Fourier maps were constructed with GSAS II to determine the contents of the MOF as preliminary studies suggested that MnTD may not be present. Results showed that MOF is present before catalysis occurs but disappears by the time 45 minutes of catalysis has ensued. Changes in the MOF’s lattice parameters and location of electron density in the Fourier maps suggest attractions between the MOF and catalyst that may lead to MOF degradation. Fourier maps also revealed limited, if any, amounts of MnTD, even before catalysis occurred. Molecular manganese oxide may be the source of the high rate of water oxidation catalysis in the studied system.},
doi = {10.2172/1213115},
url = {https://www.osti.gov/biblio/1213115}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Aug 28 00:00:00 EDT 2015},
month = {Fri Aug 28 00:00:00 EDT 2015}
}