NADH Regeneration: A Case Study of Pt-Catalyzed NAD<sup>+</sup> Reduction with H<sub>2</sub>
Tony Saba, Jianwei Li, Joseph W. H. Burnett, Russell F. Howe, Panagiotis N. Kechagiopoulos, Xiaodong Wang
Abstract
This study shows the importance of resolving catalytic performance in the regeneration of the reduced form of nicotinamide adenine dinucleotide (NADH) through activity measurements based on NAD+ conversion and the closure of mass balance via byproduct quantification. This approach is applied to assess the performance of supported platinum catalysts with varying points of zero charge, utilizing H2 as a reductant. It was found that Pt/SiO2, which exhibits a net negative charge under the reaction conditions, outperforms the neutral Pt/C and positively charged Pt/MgO because of the favorable electrostatic attraction between the catalyst surface and positively charged (+1) nicotinamide ring. NMR spectroscopy identifies side-products formed during NAD+ hydrogenation.