Journal
CHEMICAL ENGINEERING JOURNAL
Volume 389, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2020.124490
Keywords
Single-atom catalysis; Kilogram-scale; Ball milling; Gold catalysts; Preferential oxidation of CO
Categories
Funding
- National Natural Science Foundation of China [21938001, 21606260, 21576302, 21376278, 21425627]
- National Natural Science Foundation of China-SINOPEC Joint Fund [U1663220]
- Local Innovative and Research Teams Project of Guangdong Pearl River Talents Program [2017BT01C102]
- NSF of Guang-dong Province [2015A030313104]
- Fundamental Research Funds for the Central Universities of Sun Yat-sen University [15lgjc33, 19lgpy129]
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Although CeO2-supported Au single atoms (Au-1/CeO2) have great potential in preferential oxidation of CO (PROX) reaction, the large-scale synthesis of such single-atom catalysts (SACs) is still greatly challenging. Herein, we develop a dry ball milling method for the mass production of Au-1/CeO2 SACs in large quantities ( > 1 kg). The as-prepared Au-1/CeO2 SACs were demonstrated as highly active, selective, and stable catalysts for PROX at 120 degrees C with 100% CO conversion. The TOFs of Au-1/CeO2 SACs for H-2 oxidation at 120 degrees C (< 0.01 s(-1)) were about two orders of magnitude lower than that for CO oxidation. Moreover, the four Au-1/CeO2 SACs with different preparation scales showed essentially identical catalyst structure as well as catalytic performance. This approach can also be extended to prepare a family of oxide-supported noble metal SACs, which may pave a facile path for the mass production of oxide-supported SACs to meet industrialization production requirements.
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