澳大利亚新南威尔士大学Kalantar-Zadeh, Kourosh团队报道了低温液体铂催化剂。相关研究成果发表在2022年6月6日出版的《自然—化学》。

深入了解原子分散催化系统中的金属-基质相互作用对于开发孤立金属原子的真正催化活性是必要的。

研究人员发现，与空间上分离但在固体基质中不移动的催化原子不同，自然溶解在液体镓中的微量铂可以在低温（318至343K）下驱动一系列动力学增强的催化反应。分子模拟表明，铂原子在镓基体中保持液态，没有原子偏析，并激活周围的镓原子进行催化。

当用于电化学甲醇氧化时，镓-铂体系中的表面铂原子表现出比现有固体铂催化剂高三个数量级的活性（{sim{2.8}倍{10^7}，{{{mathrm{mA}}}}}}，{{{{mathrm{mg}}}}}}{{{mathrm{Pt}}}}}}}}^{-1}}}）。这种具有动态界面的液体催化剂系统为今后探索高通量催化奠定了基础。

附：英文原文

Title: Low-temperature liquid platinum catalyst

Author: Rahim, Md. Arifur, Tang, Jianbo, Christofferson, Andrew J., Kumar, Priyank V., Meftahi, Nastaran, Centurion, Franco, Cao, Zhenbang, Tang, Junma, Baharfar, Mahroo, Mayyas, Mohannad, Allioux, Francois-Marie, Koshy, Pramod, Daeneke, Torben, McConville, Christopher F., Kaner, Richard B., Russo, Salvy P., Kalantar-Zadeh, Kourosh

Issue&Volume: 2022-06-06

Abstract: Insights into metal–matrix interactions in atomically dispersed catalytic systems are necessary to exploit the true catalytic activity of isolated metal atoms. Distinct from catalytic atoms spatially separated but immobile in a solid matrix, here we demonstrate that a trace amount of platinum naturally dissolved in liquid gallium can drive a range of catalytic reactions with enhanced kinetics at low temperature (318 to 343K). Molecular simulations provide evidence that the platinum atoms remain in a liquid state in the gallium matrix without atomic segregation and activate the surrounding gallium atoms for catalysis. When used for electrochemical methanol oxidation, the surface platinum atoms in the gallium–platinum system exhibit an activity of ({sim {2.8} times {10^7},{{{mathrm{mA}}}},{{{{mathrm{mg}}}}_{{{{mathrm{Pt}}}}}^{ - 1}}},) three orders of magnitude higher than existing solid platinum catalysts. Such a liquid catalyst system, with a dynamic interface, sets a foundation for future exploration of high-throughput catalysis.

DOI: 10.1038/s41557-022-00965-6

Source: https://www.nature.com/articles/s41557-022-00965-6