Differences in the catalytic properties of Fe isotopes

The significant differences in the catalytic properties caused by different ‘isotopic catalysts’ were discovered for the first time. The commonly purchased Fe2O3 is a ‘mixture’ of different Fe isotopic oxides which means the catalytic effect of Fe2O3 is theoretically a synthetical result of all isotopic compounds. In this work, the differences in catalytic properties of α-Fe2O3 with natural abundance ratio and separated isotopic α-Fe2O3 (α-54Fe2O3, α-56Fe2O3, and α-58Fe2O3) catalyzing thermal decomposition of ammonium perchlorate (AP) were investigated, and are mainly attributed to the difference in the charge distribution of the nuclei of different iron isotopes. The result suggests that isotope effects in different isotopes when utilized as catalysts are caused by nuclear morphology and the nuclear charge distribution. This study will serve as a base as well as an initiation for future studies of the isotopic catalyst.

[1]  Shuijin Yang,et al.  Facet Effects of α-Fe2O3 with Different Morphologies on the Thermal Decomposition of Ammonium Erchlorate , 2022, Catalysis Letters.

[2]  Peter K. J. Robertson,et al.  Isotope Effects in Photocatalysis: An Underexplored Issue , 2021, ACS omega.

[3]  Qi Liu,et al.  Molecular-Level Mechanism of Phosphoric Acid Digestion of Carbonates and Recalibration of the 13C–18O Clumped Isotope Thermometer , 2020 .

[4]  T. Häger,et al.  The influence of the Fe2O3 content on the Raman spectra of sapphires , 2017 .

[5]  Lu Wang,et al.  Preparation and characterization of the AP/Al/Fe2O3 ternary nano-thermites , 2014, Journal of Thermal Analysis and Calorimetry.

[6]  Lixia Yang,et al.  Hydrothermal synthesis and characterization of α-Fe2O3 nanoparticles , 2013 .

[7]  S. Chaturvedi,et al.  A review on the use of nanometals as catalysts for the thermal decomposition of ammonium perchlorate , 2013 .

[8]  A. Buchachenko.  Mass-independent isotope effects. , 2013, The journal of physical chemistry. B.

[9]  J. Hartwig,et al.  On the interpretation of deuterium kinetic isotope effects in C-H bond functionalizations by transition-metal complexes. , 2012, Angewandte Chemie.

[10]  P. Krumbiegel.  Large deuterium isotope effects and their use: a historical review , 2011, Isotopes in environmental and health studies.

[11]  T. Yamashita,et al.  Analysis of XPS spectra of Fe2+ and Fe3+ ions in oxide materials , 2008 .

[12]  V. Boldyrev.  Thermal decomposition of ammonium perchlorate , 2006 .

[13]  J. Marlier.  Multiple isotope effects on the acyl group transfer reactions of amides and esters. , 2001, Accounts of chemical research.

[14]  J. Bigeleisen.  Nuclear Size and Shape Effects in Chemical Reactions. Isotope Chemistry of the Heavy Elements , 1996 .

[15]  R. Grigorovici,et al.  Optical Properties and Electronic Structure of Amorphous Germanium , 1966, 1966.

[16]  J. Bigeleisen,et al.  Semiempirical Study of the H2Cl Transition Complex through the Use of Hydrogen Isotope Effects , 1955 .

[17]  W. Cleland,et al.  The use of isotope effects to determine enzyme mechanisms. , 2003, The Journal of biological chemistry.

[18]  M. Calvin,et al.  An Effect of Isotopic Mass on the Rate of a Reaction Involving the Carbon‐Carbon Bond , 1949 .