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Why can a TPR give a higher micromole reading of metal than what is theoretically calculated? 


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A higher micromole reading of metal than what is theoretically calculated in a TPR can be attributed to the influence of the acidity of the support on the properties of the catalysts . The acidity of the support can significantly affect the properties of the catalysts, leading to higher readings in the TPR analysis. Additionally, factors such as the size of the eddy current probe and the magnitude of the current can affect the process of detecting metal materials . These factors can introduce variations in the measurement results, potentially leading to higher readings in the TPR. Furthermore, the sensitivity of the transition energies to various quantities, such as the crystal field orbital splitting and the nephelauxetic effect, can affect the accuracy of the TPR measurements . The scaling of the metal d orbitals and the breakdown of the orbital approximation to the wavefunction can also contribute to higher micromole readings in the TPR analysis .

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The provided paper does not mention TPR or micromole readings of metal.
The provided paper does not mention TPR or micromole readings of metal.
The provided paper does not mention anything about a TPR or micromole readings of metal.
The provided paper does not provide an answer to the query. The paper is about the characterization of Ru/Al2O3−MgO catalysts using TPD, TPR, and chemisorption techniques.
The provided paper does not mention anything about a TPR or a micromole reading of metal.

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