Wang, Y;
Feng, K;
Tian, J;
Zhang, J;
Zhao, B;
Luo, KH;
Yan, B;
(2022)
Atomically Dispersed Zn-Stabilized Niδ⁺ Enabling Tunable Selectivity for CO₂ Hydrogenation.
ChemSusChem
, 15
(7)
, Article e202102439. 10.1002/cssc.202102439.
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Abstract
For a heterogeneous catalytic process, the performance of catalysts could be improved by modifying the active metal with a second element. Determining the enhanced mechanism of the second element is essential to the rational design of catalysts. In this work, Zn was introduced as a second element into Ni/ZrO2 for CO2 hydrogenation. In contrast to Ni/ZrO2, the selectivity of NiZn/ZrO2 is observed to shift from CH4 to CO. A series of structural characterization results reveals that Zn is atomically dispersed in the NiO and ZrO2 phases as NiZnOx and ZnZrOx, respectively during CO2 hydrogenation, stabilizing a higher valence state of Ni (Niδ+) under a hydrogenation atmosphere over Ni−O−Zn site and thus promoting the generation of CO. These findings shed light on the O-mediated bimetallic effect of NiZn/ZrO2 and bring new insight into the rational design of more efficient heterogeneous catalysts.
| Type: | Article |
|---|---|
| Title: | Atomically Dispersed Zn-Stabilized Niδ⁺ Enabling Tunable Selectivity for CO₂ Hydrogenation |
| Location: | Germany |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1002/cssc.202102439 |
| Publisher version: | https://doi.org/10.1002/cssc.202102439 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | CO2 valorization, bimetallic effects, heterogeneous catalysis, hydrogenation, single-atom catalysis. |
| UCL classification: | UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Mechanical Engineering UCL > Provost and Vice Provost Offices > UCL BEAMS UCL |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10144990 |
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