Catalytically efficient Ni-NiOx-Y2O3 interface for medium temperature water-gas shift reaction

Kai Xu, Chao Ma, Han Yan, Hao Gu, Wei-Wei Wang, Shan-Qing Li, Qing-Lu Meng, Wei-Peng Shao, Guo-Heng Ding, Feng Ryan Wang () and Chun-Jiang Jia ()
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Kai Xu: Shandong University
Chao Ma: Hunan University
Han Yan: Shandong University
Hao Gu: University College London
Wei-Wei Wang: Shandong University
Shan-Qing Li: Chizhou University
Qing-Lu Meng: Shandong University
Wei-Peng Shao: Shandong University
Guo-Heng Ding: Shandong University
Feng Ryan Wang: University College London
Chun-Jiang Jia: Shandong University

Nature Communications, 2022, vol. 13, issue 1, 1-9

Abstract: Abstract The metal-support interfaces between metals and oxide supports have long been studied in catalytic applications, thanks to their significance in structural stability and efficient catalytic activity. The metal-rare earth oxide interface is particularly interesting because these early transition cations have high electrophilicity, and therefore good binding strength with Lewis basic molecules, such as H2O. Based on this feature, here we design a highly efficient composite Ni-Y2O3 catalyst, which forms abundant active Ni-NiOx-Y2O3 interfaces under the water-gas shift (WGS) reaction condition, achieving 140.6 μmolCO gcat−1 s−1 rate at 300 °C, which is the highest activity for Ni-based catalysts. A combination of theory and ex/in situ experimental study suggests that Y2O3 helps H2O dissociation at the Ni-NiOx-Y2O3 interfaces, promoting this rate limiting step in the WGS reaction. Construction of such new interfacial structure for molecules activation holds great promise in many catalytic systems.

Date: 2022
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DOI: 10.1038/s41467-022-30138-5

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