A general synthesis approach for supported bimetallic nanoparticles via surface inorganometallic chemistry
A general synthesis approach for supported bimetallic nanoparticles via surface inorganometallic chemistry
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DOI：
10.1126/science.aau4414
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发表时间：
2018-11-02
期刊：
影响因子：
56.9
通讯作者：
Cao, Dongmei
中科院分区：
文献类型：
--
作者：
Ding, Kunlun;Cullen, David A.;Cao, Dongmei
合成具有明确化学计量和成分金属之间的紧密性的超小负载双金属纳米粒子（直径在 1 至 3 纳米之间）仍然是一个巨大的挑战。我们通过表面无机金属化学通过分解和还原表面吸附的异金属双络合物盐合成了 10 种不同的负载型双金属纳米颗粒，这些盐通过在二氧化硅基底上顺序吸附目标阳离子和阴离子而容易获得。例如，吸附四氨合钯(II) [Pd(NH3)(4)(2+)]，然后吸附四氯铂酸盐[PtCl42-]，用于形成钯-铂(Pd-Pt)纳米颗粒。这些负载的双金属纳米颗粒在乙炔选择性加氢中表现出增强的催化性能，这清楚地表明了组成金属之间的协同效应。
The synthesis of ultrasmall supported bimetallic nanoparticles (between 1 and 3 nanometers in diameter) with well-defined stoichiometry and intimacy between constituent metals remains a substantial challenge. We synthesized 10 different supported bimetallic nanoparticles via surface inorganometallic chemistry by decomposing and reducing surface-adsorbed heterometallic double complex salts, which are readily obtained upon sequential adsorption of target cations and anions on a silica substrate. For example, adsorption of tetraamminepalladium(II) [Pd(NH3)(4)(2+)] followed by adsorption of tetrachloroplatinate [PtCl42-] was used to form palladium-platinum (Pd-Pt) nanoparticles. These supported bimetallic nanoparticles show enhanced catalytic performance in acetylene selective hydrogenation, which clearly demonstrates a synergistic effect between constituent metals.