A chemiluminescence-based analyzer of NOx gas species has been applied for high-throughput screening of a library of catalytic materials. The applicability of the commercial NOx analyzer as a rapid screening tool was evaluated using selective catalytic reduction of NO gas. A library of 60 binary alloys composed of Pt and Co, Zr, La, Ce, Fe or W on Al2O3 substrate was tested for the efficiency of NOx removal using a home-built 64-channel parallel and sequential tubular reactor. The NOx concentrations measured by the NOx analyzer agreed well with the results obtained using micro gas chromatography for a reference catalyst consisting of 1 wt% Pt on γ-Al2O3. Most alloys showed high efficiency at 275 °C, which is typical of Pt-based catalysts for selective catalytic reduction of NO. The screening with NOx analyzer allowed to select Pt-Ce(X) (X=1–3) and Pt–Fe(2) as the optimal catalysts for NOx removal: 73% NOx conversion was achieved with the Pt–Fe(2) alloy, which was much better than the results for the reference catalyst and the other library alloys. This study demonstrates a sequential high-throughput method of practical evaluation of catalysts for the selective reduction of NO.
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机译：基于化学发光的NO x 气体物种分析仪已用于催化材料库的高通量筛选。使用选择性催化还原NO气体评估了商用NO x 分析仪作为快速筛选工具的适用性。测试了在Al 2 O 3 衬底上的60种由Pt和Co，Zr，La，Ce，Fe或W组成的二元合金库的NO x 去除。用NO x 分析仪测得的NO x 浓度与使用微量气相色谱法在γ-Al 2 O 3 。大多数合金在275°C时表现出高效率，这是Pt基催化剂典型的NO选择性催化还原反应。使用NO x 分析仪进行筛选可以选择Pt-Ce （X）（X = 1–3）和Pt–Fe （2）作为去除NO x 的最佳催化剂：Pt–Fe （2）合金可实现73％的NO x 转化率，优于参考催化剂和其他库合金的结果。这项研究证明了一种用于评估NO选择性还原的催化剂的连续高通量实践评估方法。
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