CuNi Nanoparticles Assembled on Graphene for Catalytic Methanolysis of Ammonia Borane and Hydrogenation of Nitro/Nitrile Compounds

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• 作者：Chao Yu ; Jiaju Fu ; Michelle Muzzio ; Tunli Shen ; Dong SuJunjie Zhu ; Shouheng Sun
• 刊名：Chemistry of Materials
• 出版年：2017
• 出版时间：February 14, 2017
• 年：2017
• 卷：29
• 期：3
• 页码：1413-1418
• 全文大小：473K
• ISSN：1520-5002

文摘

We report a solution-phase synthesis of 16 nm CuNi nanoparticles (NPs) with the Cu/Ni composition control. These NPs are assembled on graphene (G) and show Cu/Ni composition-dependent catalysis for methanolysis of ammonia borane (AB) and hydrogenation of aromatic nitro (nitrile) compounds to primary amines in methanol at room temperature. Among five different CuNi NPs studied, the G-Cu₃₆Ni₆₄ NPs are the best catalyst for both AB methanolysis (turnover frequency (TOF) of 49.1 mol_H2 mol_CuNi^–1 min^–1 and an activation energy (E_a) of 24.4 kJ/mol) and hydrogenation reactions (conversion yield of >97%). The G-CuNi compound represents a unique noble-metal-free catalyst for hydrogenation reactions in a green environment without using pure hydrogen.