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Nakaya Y, Hayashida E, Asakura H, Takakusagi S, Yasumura S, Shimizu KI, Furukawa S. High-Entropy Intermetallics Serve Ultrastable Single-Atom Pt for Propane Dehydrogenation. J Am Chem Soc 2022; 144:15944-15953. [PMID: 35984749 DOI: 10.1021/jacs.2c01200] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Propane dehydrogenation has been a promising propylene production process that can compensate for the increasing global demand for propylene. However, Pt-based catalysts with high stability at ≥600 °C have barely been reported because the catalysts typically result in short catalyst life owing to side reactions and coke formation. Herein, we report a new class of heterogeneous catalysts using high-entropy intermetallics (HEIs). Pt-Pt ensembles, which cause side reactions, are entirely diluted by the component inert metals in PtGe-type HEIs. The resultant HEI (PtCoCu) (GeGeSn)/Ca-SiO2 exhibited an outstandingly high catalytic stability, even at 600 °C (kd-1 = τ = 4146 h = 173 d), and almost no deactivation of the catalyst was observed for 2 months for the first time. Detailed experimental studies and theoretical calculations demonstrated that the combination of the site-isolation and entropy effects upon multi-metallization of PtGe drastically enhanced the desorption of propylene and the thermal stability, eventually suppressing the side reactions even at high reaction temperatures.
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Affiliation(s)
- Yuki Nakaya
- Institute for Catalysis, Hokkaido University, N-21, W-10, Kita-ku, Sapporo 001-0021, Japan
| | - Eigo Hayashida
- Institute for Catalysis, Hokkaido University, N-21, W-10, Kita-ku, Sapporo 001-0021, Japan
| | - Hiroyuki Asakura
- Elements Strategy Initiative for Catalysts and Batteries, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8520, Japan
| | - Satoru Takakusagi
- Institute for Catalysis, Hokkaido University, N-21, W-10, Kita-ku, Sapporo 001-0021, Japan
| | - Shunsaku Yasumura
- Institute for Catalysis, Hokkaido University, N-21, W-10, Kita-ku, Sapporo 001-0021, Japan
| | - Ken-Ichi Shimizu
- Institute for Catalysis, Hokkaido University, N-21, W-10, Kita-ku, Sapporo 001-0021, Japan.,Elements Strategy Initiative for Catalysts and Batteries, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8520, Japan
| | - Shinya Furukawa
- Institute for Catalysis, Hokkaido University, N-21, W-10, Kita-ku, Sapporo 001-0021, Japan.,Elements Strategy Initiative for Catalysts and Batteries, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8520, Japan.,Precursory Research for Embryonic Science and Technology, Japan Science and Technology Agency, Chiyoda, Tokyo 102-0076, Japan
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