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Highly Dispersed Copper over β-Mo2C as an Efficient and Stable Catalyst for the Reverse Water Gas Shift (RWGS) Reaction
ACS Catalysis ( IF 11.3 ) Pub Date : 2016-12-28 00:00:00 , DOI: 10.1021/acscatal.6b02991 Xiao Zhang 1 , Xiaobing Zhu 1 , Lili Lin 2 , Siyu Yao 2 , Mengtao Zhang 2 , Xi Liu 3 , Xiaoping Wang 3 , Yong-Wang Li 3 , Chuan Shi 1 , Ding Ma 2
ACS Catalysis ( IF 11.3 ) Pub Date : 2016-12-28 00:00:00 , DOI: 10.1021/acscatal.6b02991 Xiao Zhang 1 , Xiaobing Zhu 1 , Lili Lin 2 , Siyu Yao 2 , Mengtao Zhang 2 , Xi Liu 3 , Xiaoping Wang 3 , Yong-Wang Li 3 , Chuan Shi 1 , Ding Ma 2
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Cu-oxide catalysts have a tendency to deactivate dramatically in reverse water gas shift (RWGS) reaction, because of the aggregation of supported copper particles at high temperatures. Herein, β-Mo2C, which is a typical type of transition-metal carbide, has been demonstrated to be capable of dispersing and stabilizing copper particles. Cu/β-Mo2C catalysts exhibit good catalytic activity and stability for the RWGS reaction. Under relatively high weight hourly space velocity (WHSV = 300 000 mL/g/h), the optimized 1 wt % Cu/β-Mo2C exhibits superior activity over traditional oxide-supported Pt- and Cu-based catalysts. The activity was well-maintained in a 40 h stability test, and the catalyst shows stable reactivity in a six-cycle start-up cool-down experiment. Detailed structure characterizations demonstrate that the strong interaction between Cu and β-Mo2C effectively promotes the dispersion of supported copper and prevents the aggregation of Cu particles, which accounts for the extraordinary activity and stability for the RWGS reaction.
中文翻译：
高度分散的铜超过β钼2 C作为对反向水煤气变换一个高效，稳定的催化剂（RWGS）反应
由于在高温下负载的铜颗粒的聚集，氧化铜催化剂在逆水煤气变换（RWGS）反应中具有急剧失活的趋势。这里，β-沫2 C，它是过渡金属碳化物的典型类型，已被证明能够分散和稳定的铜颗粒组成。的Cu /β-沫2 C催化剂表现出良好的催化活性和稳定性的RWGS反应。在相对高的重时空速（WHSV = 300 000毫升/克/小时），优化的1重量％的Cu /β-沫2C表现出优于传统的氧化物负载的Pt和Cu基催化剂的活性。在40小时的稳定性测试中，该活性得到了很好的维持，并且该催化剂在六周期启动冷却实验中显示出稳定的反应性。详细结构表征表明，Cu和β-Mo系之间的强相互作用2 ç有效地促进负载的铜并防止Cu粒子的聚集，其占非凡的活性和稳定性的RWGS反应的分散。
更新日期：2016-12-28
中文翻译：
高度分散的铜超过β钼2 C作为对反向水煤气变换一个高效，稳定的催化剂（RWGS）反应
由于在高温下负载的铜颗粒的聚集，氧化铜催化剂在逆水煤气变换（RWGS）反应中具有急剧失活的趋势。这里，β-沫2 C，它是过渡金属碳化物的典型类型，已被证明能够分散和稳定的铜颗粒组成。的Cu /β-沫2 C催化剂表现出良好的催化活性和稳定性的RWGS反应。在相对高的重时空速（WHSV = 300 000毫升/克/小时），优化的1重量％的Cu /β-沫2C表现出优于传统的氧化物负载的Pt和Cu基催化剂的活性。在40小时的稳定性测试中，该活性得到了很好的维持，并且该催化剂在六周期启动冷却实验中显示出稳定的反应性。详细结构表征表明，Cu和β-Mo系之间的强相互作用2 ç有效地促进负载的铜并防止Cu粒子的聚集，其占非凡的活性和稳定性的RWGS反应的分散。
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