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Dynamic structure of active sites in ceria-supported Pt catalysts for the water gas shift reaction

https://doi.org/10.1038/s41467-021-21132-4

Li, Yuanyuan; Kottwitz, Matthew; Vincent, Joshua L.; Enright, Michael J.; Liu, Zongyuan; Zhang, Lihua; Huang, Jiahao; Senanayake, Sanjaya D.; Yang, Wei-Chang D.; Crozier, Peter A.; et al (December 2021, Nature Communications)

Abstract Oxide-supported noble metal catalysts have been extensively studied for decades for the water gas shift (WGS) reaction, a catalytic transformation central to a host of large volume processes that variously utilize or produce hydrogen. There remains considerable uncertainty as to how the specific features of the active metal-support interfacial bonding—perhaps most importantly the temporal dynamic changes occurring therein—serve to enable high activity and selectivity. Here we report the dynamic characteristics of a Pt/CeO 2 system at the atomic level for the WGS reaction and specifically reveal the synergistic effects of metal-support bonding at the perimeter region. We find that the perimeter Pt 0 − O vacancy−Ce 3+ sites are formed in the active structure, transformed at working temperatures and their appearance regulates the adsorbate behaviors. We find that the dynamic nature of this site is a key mechanistic step for the WGS reaction.
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Modeling Equilibrium Binding at Quantum Dot Surfaces Using Cyclic Voltammetry

https://doi.org/10.1021/acs.nanolett.0c00162

Henckel, Danielle A.; Enright, Michael J.; Panahpour Eslami, Noushyar; Kroupa, Daniel M.; Gamelin, Daniel R.; Cossairt, Brandi M. (April 2020, Nano Letters)

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Seeded Growth of Nanoscale Semiconductor Tetrapods: Generality and the Role of Cation Exchange

https://doi.org/10.1021/acs.chemmater.0c01407

Enright, Michael J.; Dou, Florence Y.; Wu, Shenwei; Rabe, Emily J.; Monahan, Madison; Friedfeld, Max R.; Schlenker, Cody W.; Cossairt, Brandi M. (June 2020, Chemistry of Materials)

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Effects of Zn ²⁺ and Ga ³⁺ doping on the quantum yield of cluster-derived InP quantum dots

https://doi.org/10.1063/1.5126971

Friedfeld, Max R.; Stein, Jennifer L.; Johnson, Dane A.; Park, Nayon; Henry, Nicholas A.; Enright, Michael J.; Mocatta, David; Cossairt, Brandi M. (November 2019, The Journal of Chemical Physics)