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A Sulfur‐Fixing Strategy toward Carbon‐Supported Ru‐Based Bimetallic Nanocluster Catalysts
ChemNanoMat ( IF 2.6 ) Pub Date : 2020-04-06 , DOI: 10.1002/cnma.202000054 Li‐Zhen Li 1 , Shi‐Long Xu 1 , Shan‐Cheng Shen 1 , Lei Wang 1 , Ming Zuo 1 , Ping Chen 2 , Hai‐Wei Liang 1
ChemNanoMat ( IF 2.6 ) Pub Date : 2020-04-06 , DOI: 10.1002/cnma.202000054 Li‐Zhen Li 1 , Shi‐Long Xu 1 , Shan‐Cheng Shen 1 , Lei Wang 1 , Ming Zuo 1 , Ping Chen 2 , Hai‐Wei Liang 1
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Supported bimetallic nanocluster catalysts that are distinctly advantageous in optimizing the geometric/electronic effects and maximizing the metal atom utilization have attracted immense interest in the field of heterogeneous catalysis. However, the conventional impregnation techniques often cause poor dispersion of bimetallic particles even on high‐surface‐area supports owing to the lack of strong metal‐support interactions. Here, we present a general route to prepare Ru−M (M=Ga, In, Ge, Sn, Ni) bimetallic nanoclusters with average particle sizes of 1.02–1.24 nm by use of mesoporous sulfur‐doped carbon as supports. The strong chemical interaction between metal and the sulfur atoms that are doped in the carbon matrix can greatly suppress the aggregation of metal species during the H2‐reduction at 600 °C and thus guarantee the formation of small‐sized alloyed nanoclusters. Among these nanoclusters, the prepared bimetallic Ru−Sn nanocluster catalysts show enhanced catalytic activity for the selective hydrogenation of quinoline and furfural with a high turnover frequency of 2948 h−1 and 184 h−1, respectively.
中文翻译：
碳载钌基双金属纳米簇催化剂的固硫策略
在优化几何/电子效应和最大化金属原子利用率方面具有明显优势的负载型双金属纳米簇催化剂在非均相催化领域引起了极大的兴趣。然而，由于缺乏强的金属-载体相互作用，常规的浸渍技术即使在高表面积的载体上也常常导致双金属颗粒的分散不良。在这里，我们提出了一种一般方法，以介孔硫掺杂碳为载体，制备平均粒径为1.02-1.24 nm的Ru-M（M = Ga，In，Ge，Sn，Ni）双金属纳米簇。金属与掺杂在碳基质中的硫原子之间的强化学相互作用可以极大地抑制H 2期间金属物种的聚集-在600°C下还原，从而保证形成小型合金纳米团簇。在这些纳米团簇，将制备的双金属钌-锡催化剂纳米团簇显示增强的催化活性的喹啉的选择性加氢和糠醛与2948 h的高周转频率-1和184ħ -1分别。
更新日期：2020-04-06
中文翻译：
碳载钌基双金属纳米簇催化剂的固硫策略
在优化几何/电子效应和最大化金属原子利用率方面具有明显优势的负载型双金属纳米簇催化剂在非均相催化领域引起了极大的兴趣。然而，由于缺乏强的金属-载体相互作用，常规的浸渍技术即使在高表面积的载体上也常常导致双金属颗粒的分散不良。在这里，我们提出了一种一般方法，以介孔硫掺杂碳为载体，制备平均粒径为1.02-1.24 nm的Ru-M（M = Ga，In，Ge，Sn，Ni）双金属纳米簇。金属与掺杂在碳基质中的硫原子之间的强化学相互作用可以极大地抑制H 2期间金属物种的聚集-在600°C下还原，从而保证形成小型合金纳米团簇。在这些纳米团簇，将制备的双金属钌-锡催化剂纳米团簇显示增强的催化活性的喹啉的选择性加氢和糠醛与2948 h的高周转频率-1和184ħ -1分别。
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