Preferential CO oxidation over Au/ZnO and Au/ZnO–Fe2O3 catalysts prepared by photodeposition
Preferential CO oxidation over Au/ZnO and Au/ZnO–Fe2O3 catalysts prepared by photodeposition
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DOI：
10.1016/j.ijhydene.2009.10.015
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发表时间：
2009-12
影响因子：
7.2
通讯作者：
Pattarasuda Naknam;A. Luengnaruemitchai;S. Wongkasemjit
中科院分区：
文献类型：
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作者：
Pattarasuda Naknam;A. Luengnaruemitchai;S. Wongkasemjit
研究了在紫外-可见光下通过光沉积制备的 Au/ZnO 和 Au/ZnO-Fe2O3 催化剂在富 H2 流中的选择性 CO 氧化。 Au/ZnO 和 Au/ZnO-Fe2O3 催化剂在 30-130°C 的温度范围内均表现出高催化活性。 TEM 结果表明 Au/ZnO 和 Au/ZnO-Fe2O3 催化剂上 Au 的平均粒径在 3-5 nm 范围内。此外，DR/UV-vis光谱显示所制备的催化剂在催化剂载体上含有Auδ+和Au0（PROX反应的活性位点）。根据实验观察，可以得出结论，即使在模拟流中同时添加 CO2 和 H2O，光沉积制备的催化剂也表现出优异的催化活性。
Preferential CO oxidation in a H2-rich stream was studied over Au/ZnO and Au/ZnO–Fe2O3catalysts prepared by photodeposition under UV–vis light. The high catalytic activities of both Au/ZnO and Au/ZnO–Fe2O3catalysts are presented over a temperature range of 30–130°C. TEM results revealed that the average particle size of Au over the Au/ZnO and Au/ZnO–Fe2O3catalysts, is in the range of 3–5nm. Moreover, DR/UV–vis spectra showed that the prepared catalysts contained Auδ+and Au0(active sites for the PROX reaction) on the catalyst support. Based on the experiment observations, it can be concluded that the catalysts prepared by a photodeposition exhibited excellent catalytic activity, even when both CO2and H2O were added to the simulated stream.