Studying Catalytically Viable Single-Crystalline Metal Oxide Nanorods Using Synchrotron-Based Scanning Hard X-ray Microscopy
Studying Catalytically Viable Single-Crystalline Metal Oxide Nanorods Using Synchrotron-Based Scanning Hard X-ray Microscopy
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DOI：
10.1021/acs.jpcc.9b05027
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发表时间：
2019-07
期刊：
影响因子：
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通讯作者：
Luyao Li;Sha Tan;Shiyu Yue;Hanfei Yan;Y. Chu;X. Tong;Stanislaus S. Wong
中科院分区：
文献类型：
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作者：
Luyao Li;Sha Tan;Shiyu Yue;Hanfei Yan;Y. Chu;X. Tong;Stanislaus S. Wong
基于同步加速器的扫描硬X射线显微镜（SHXM）被用来提取本地化的化学和结构信息内的模型碱土金属钨酸盐纳米棒的系统，其特征在于由多种化学配置。具体来说，我们已经强调了SHXM探测化学上独特的纳米级物质的实际能力，包括（i）化学掺杂与（ii）尺寸相当的固溶态纳米棒，在环境条件下使用模板导向方法合成。事实上，我们表明SHXM可以用于绘制具有纳米级分辨率的各向异性纳米棒内的元素分布，再加上化学灵敏度和特异性。互补的电化学结果表明，使用这些纳米棒作为支持材料的酸性电解质介质内的电氧化反应的可能性。我们的结构和化学成分的结果已经证实了使用平行调查线，包括扫描电子...
Synchrotron-based scanning hard X-ray microscopy (SHXM) was used to extract localized chemical and structural information within a system of model alkaline earth-metal tungstate nanorods, characterized by multiple chemical configurations. Specifically, we have highlighted the practical ability of SHXM to probe chemically distinctive nanoscale species, consisting of (i) chemically doped versus (ii) solid solution-state nanorods of comparable dimension, synthesized using a template-directed method under ambient conditions. Indeed, we show that SHXM can be used to map out elemental distributions within individual anisotropic nanorods with nanoscale resolution, coupled with chemical sensitivity and specificity. Complementary electrochemical results suggest the possibility of using these nanorods as support materials for electro-oxidation reactions within an acidic electrolyte medium. Our structural and chemical composition results have been corroborated using parallel lines of inquiry involving scanning elect...