Hydroxylated TiO2-induced high-density Ni clusters for breaking the activity-selectivity trade-off of CO2 hydrogenation

Cong-Xiao Wang, Hao-Xin Liu, Hao Gu, Jin-Ying Li, Xiao-Meng Lai, Xin-Pu Fu, Wei-Wei Wang, Qiang Fu, Feng Ryan Wang (), Chao Ma () and Chun-Jiang Jia ()
Additional contact information
Cong-Xiao Wang: Shandong University
Hao-Xin Liu: Shandong University
Hao Gu: Roberts Building
Jin-Ying Li: Shandong University
Xiao-Meng Lai: Shandong University
Xin-Pu Fu: Shandong University
Wei-Wei Wang: Shandong University
Qiang Fu: University of Science and Technology of China
Feng Ryan Wang: Roberts Building
Chao Ma: Hunan University
Chun-Jiang Jia: Shandong University

Nature Communications, 2024, vol. 15, issue 1, 1-11

Abstract: Abstract The reverse water gas shift reaction can be considered as a promising route to mitigate global warming by converting CO2 into syngas in a large scale, while it is still challenging for non-Cu-based catalysts to break the trade-off between activity and selectivity. Here, the relatively high loading of Ni species is highly dispersed on hydroxylated TiO2 through the strong Ni and −OH interactions, thereby inducing the formation of rich and stable Ni clusters (~1 nm) on anatase TiO2 during the reverse water gas shift reaction. This Ni cluster/TiO2 catalyst shows a simultaneous high CO2 conversion and high CO selectivity. Comprehensive characterizations and theoretical calculations demonstrate Ni cluster/TiO2 interfacial sites with strong CO2 activation capacity and weak CO adsorption are responsible for its unique catalytic performances. This work disentangles the activity-selectivity trade-off of the reverse water gas shift reaction, and emphasizes the importance of metal−OH interactions on surface.

Date: 2024
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DOI: 10.1038/s41467-024-52547-4

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