Strasser Peter
Department of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas 77204-4004, USA.
J Comb Chem. 2008 Mar-Apr;10(2):216-24. doi: 10.1021/cc700166p. Epub 2008 Feb 8.
We report the combinatorial and high-throughput optimization of improved ternary Pt alloy electrocatalysts for the oxidation of methanol for use in direct methanol fuel cell (DMFC) anodes. Following up on the discovery of a ternary Pt20Co60Ru20 catalyst with significantly improved electrocatalytic activity for methanol oxidation over standard Pt-Ru catalysts, we optimize the electrocatalytic activity of this composition using a closely sampled Pt-Co-Ru "optimization library". We also screen for compositional and structural stability using high-throughput methods. Composition-activity maps confirmed improved activity in compositional neighborhood of the Pt20Co60Ru20 catalyst. Activity trends of Pt-Ru binary alloys were in excellent agreement with fundamental surface electrochemical studies. Structural and compositional catalyst stability was probed using X-ray diffraction (XRD) and energy dispersive X-ray analysis (EDX). Combination of the stability-composition and activity-composition maps resulted in "consensus maps" pointing to a new optimized ternary alloy electrocatalyst for methanol electrooxidation with an overall composition of Pt18Co62Ru20.
我们报告了用于直接甲醇燃料电池（DMFC）阳极甲醇氧化的改进型三元铂合金电催化剂的组合式高通量优化。在发现一种三元Pt20Co60Ru20催化剂对甲醇氧化的电催化活性比标准Pt-Ru催化剂有显著提高之后，我们使用紧密采样的Pt-Co-Ru“优化库”来优化该组成的电催化活性。我们还使用高通量方法筛选组成和结构稳定性。组成-活性图证实了在Pt20Co60Ru20催化剂组成邻域内活性有所提高。Pt-Ru二元合金的活性趋势与基础表面电化学研究结果高度一致。使用X射线衍射（XRD）和能量色散X射线分析（EDX）探测了催化剂的结构和组成稳定性。稳定性-组成图和活性-组成图相结合产生了“共识图”，指向一种用于甲醇电氧化的新型优化三元合金电催化剂，其总体组成为Pt18Co62Ru20。
