Bifunctional Gold-Platinum Nanoparticle Catalyst: Fabrication and Characterization

无机，生物无机和有机化学计划的这一奖项支持SUNY Binghamton的Chuan-Jian Zhong博士使用金铂（AuPt）制造和表征双功能纳米颗粒催化剂的研究。我们的目标是建立一个理解的设计，合成和加工参数，控制这些纳米粒子的大小和组成及其催化性能。单层封端的纳米颗粒合成和热处理的组合将用于制备具有在1-10 nm范围内的可控组成的单分散纳米颗粒，在该范围内纳米颗粒经历从原子性质到金属性质的转变。这种二元组合物预计将产生协同效应，包括抑制吸附的有毒物质和改变电子能带结构以改变化学吸附的强度。拟议的工作将涉及四项具体任务：（1）通过初始合成1-2 nm尺寸和不同金含量的烷硫醇盐封端的颗粒，随后进行热处理以获得可控的组成和更大的尺寸，制备1-10 nm核尺寸和0-100% Au组成的AuPt纳米颗粒，（2）在高表面积碳纳米材料上的组装（球体和纳米管）和具有受控分散和质量负载的碳负载的金属氧化物，和（3）具有可控尺寸、组成和空间性质的负载的纳米颗粒的热活化，以及（4）评价活化的纳米颗粒对甲醇氧化和氧还原的电催化活性。 将热处理和活化数据与聚结和烧结的理论模型进行比较。 一些表面技术（AFM，TEM，FTIR，XPS，XRD）将被用来探测控制双功能纳米粒子的尺寸和组成的因素，并建立它们的催化相关性，所提出的工作的结果有望推进新的应用二元纳米粒子在基础和实际的多相催化。 这个项目将让当地的高中生和本科生在暑假工作。 学生将接受纳米技术领域的培训，为未来的劳动力。

This award in the Inorganic, Bioinorganic and Organometallic Chemistry program supports research by Dr. Chuan-Jian Zhong at SUNY Binghamton to fabricate and characterize bifunctional nanoparticle catalysts using gold-platinum (AuPt). The objective is to establish an understanding of the design, synthetic and processing parameters that control the size and composition of these nanoparticles and their catalytic properties. A combination of the monolayer-capped nanoparticle synthesis and the thermal processing will be used to prepare the monodispersed nanoparticles with controllable composition in the 1-10 nm range over which the nanoparticles undergo a transition from atomic to metallic properties. This binary composition is expected to generate synergistic effects involving the suppression of adsorbed poisonous species and the change in electronic band structure to modify the strength of chemical adsorption. The proposed work will involve four specific tasks: (1) the preparation of AuPt nanoparticles of 1-10 nm core sizes and 0-100% Au composition via an initial synthesis of alkanethiolate-capped particles of 1-2 nm sizes and different gold contents followed by subsequent thermal processing towards controllable compositions and larger sizes, (2) the assembly onto high surface area carbon nanomaterials (spheres and nanotubes) and the carbon-supported metal oxides with controlled dispersion and mass loading, and (3) the thermal activation of the supported nanoparticles with controllable size, composition and spatial properties, and (4) the evaluation of activities of the activated nanoparticles toward electrocatalytic methanol oxidation and oxygen reduction. The thermal processing and activation data will be compared with theoretical models of coalescence and sintering. A number of surface techniques (AFM, TEM, FTIR, XPS, XRD) will be used to probe factors controlling the size and composition of the bifunctional nanoparticles and to establish their catalytic correlationThe results of the proposed work are expected to advance new applications of binary nanoparticles in both fundamental and practical heterogeneous catalysis. This project will involve local high school students and undergraduates to work during the summers. Students will be trained in areas of nanotechnology for the future workforce.