Soft Template-Directed Reactions: One-Pot Synthetic Route for Bimetallic Core-Satellite-Shell Structured Electrocatalytic Nanospheres
Soft Template-Directed Reactions: One-Pot Synthetic Route for Bimetallic Core-Satellite-Shell Structured Electrocatalytic Nanospheres
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软模板导向反应：双金属核-卫星-壳结构电催化纳米球的一锅合成路线
DOI：
10.1002/cctc.201800346
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发表时间：
2018
期刊：
影响因子：
4.5
通讯作者：
Jiao Huan
中科院分区：
文献类型：
--
作者：
He Yue;Wang Qin;Wei Zhen;Xu Ling;Wang Zenglin;Huang Hao;Jiao Huan
报道了一锅法合成纳米粒子(NP)的方法，该方法在反应开始时抑制了纳米粒子的团聚，并防止了核心粒子和小粒子的结合。在本研究中，我们合成了单层Au核和卫星状铂纳米颗粒的双金属核壳结构。核心是由HAuCl4产生的；因此，为电子提供了独特的导电能力。整个反应过程中，铂纳米粒子的整个演化过程被限制在二氧化硅纳米球内。通过很强的静电吸引，紧密堆积在H3O+中的铂纳米粒子相应地提高了吸氢率。对产物和工业铂/C-20 %在析氢反应(HER)中的电催化活性的对比研究表明，Au@SiO_2-PT在电解液中具有很强的金属相互作用，表现出较低的塔菲尔斜率52 mV dec−1，其催化活性至少保持10 h。此外，它还表现出很高的循环频率(TOF值)0.11 S−1。
A one‐pot synthesis strategy, which retards nanoparticle (NP) agglomeration in the initiation of reaction and prevents the combination of the core and small species, is reported. In the present study, we synthesize bimetallic core–shell structures of single Au cores and satellites‐like Pt NPs. The core was generated by using HAuCl4; thus, providing the unique conductive ability for electrons. The entire evolution process of Pt NPs during the whole reaction was confined within the SiO2nanospheres. Through strong electrostatic attraction, the Pt NPs in a tight H3O+packing accordingly increased the adsorbed hydrogen (Had) rate. The comparative investigation of electrocatalytic activities of the products and commercial Pt/C‐20 % in the hydrogen evolution reaction (HER) revealed that the Au@SiO2‐Pt, with a strong metal interaction effect in the electrolyte, exhibits a low Tafel slope of 52 mV dec−1, with its catalytic activity being maintained for at least 10 h. Impressively, it also demonstrates a high turnover frequency (TOF) value of 0.11 s−1.