High-Temperature Synthesis of Small-Sized Pt/Nb Alloy Catalysts on Carbon Supports for Hydrothermal Reactions
Autor: | Weixin Huang, Hai-Wei Liang, Ping Chen, Lei Wang, Lu-Jie Zuo, Shuai Zhao, Shi-Long Xu, Wei Xiong, Shan-Cheng Shen, Kun Qian, Shengqi Chu, Wei-Jie Zeng, Yue Lin |
---|---|
Rok vydání: | 2020 |
Předmět: |
010405 organic chemistry
Alloy chemistry.chemical_element Sintering Carbon black engineering.material 010402 general chemistry 01 natural sciences Hydrothermal circulation Water-gas shift reaction 0104 chemical sciences Catalysis Inorganic Chemistry chemistry.chemical_compound chemistry Chemical engineering Levulinic acid engineering Physical and Theoretical Chemistry Carbon |
Zdroj: | Inorganic Chemistry. 59:15953-15961 |
ISSN: | 1520-510X 0020-1669 |
Popis: | Catalytic biomass conversions are sustainable processes to produce value-added fuels and chemicals but need stable catalysts that can tolerate harsh hydrothermal conditions. Herein, we report a hydrothermally stable catalyst by alloying Pt with a high-melting-point metal Nb. The Pt/Nb alloy catalysts are prepared by H2 reduction at a high temperature of 900 °C with a high-surface-area carbon black support, which can suppress metal sintering at high temperatures and thus lead to small-sized alloyed Pt/Nb particles of only 2.2 nm. Taking the advantages of surface acid property provided by the Nb sites and the size effect, the prepared C-supported small-sized Pt/Nb alloy catalysts exhibit attractive activities for the hydrogenation of levulinic acid into γ-valerolactone and the water-gas shift reaction. More significantly, benefiting from the inherent stability of high-melting-point Nb, the Pt/Nb alloy catalysts show much enhanced hydrothermal stability compared to commercial Pt/C and Ru/C catalysts. |
Databáze: | OpenAIRE |
Externí odkaz: |