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Recover the activity of sintered supported catalysts by nitrogen-doped carbon atomization.
Nature Communications ( IF 14.7 ) Pub Date : 2020-01-17 , DOI: 10.1038/s41467-019-14223-w Huang Zhou 1 , Yafei Zhao 1 , Jie Xu 2 , Haoran Sun 3 , Zhijun Li 1 , Wei Liu 3 , Tongwei Yuan 4 , Wei Liu 5 , Xiaoqian Wang 1 , Weng-Chon Cheong 6 , Zhiyuan Wang 1 , Xin Wang 1 , Chao Zhao 1 , Yancai Yao 1 , Wenyu Wang 1 , Fangyao Zhou 1 , Min Chen 1 , Benjin Jin 1 , Rongbo Sun 1 , Jing Liu 2 , Xun Hong 1 , Tao Yao 5 , Shiqiang Wei 5 , Jun Luo 2 , Yuen Wu 1, 3
Nature Communications ( IF 14.7 ) Pub Date : 2020-01-17 , DOI: 10.1038/s41467-019-14223-w Huang Zhou 1 , Yafei Zhao 1 , Jie Xu 2 , Haoran Sun 3 , Zhijun Li 1 , Wei Liu 3 , Tongwei Yuan 4 , Wei Liu 5 , Xiaoqian Wang 1 , Weng-Chon Cheong 6 , Zhiyuan Wang 1 , Xin Wang 1 , Chao Zhao 1 , Yancai Yao 1 , Wenyu Wang 1 , Fangyao Zhou 1 , Min Chen 1 , Benjin Jin 1 , Rongbo Sun 1 , Jing Liu 2 , Xun Hong 1 , Tao Yao 5 , Shiqiang Wei 5 , Jun Luo 2 , Yuen Wu 1, 3
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The sintering of supported metal nanoparticles is a major route to the deactivation of industrial heterogeneous catalysts, which largely increase the cost and decrease the productivity. Here, we discover that supported palladium/gold/platinum nanoparticles distributed at the interface of oxide supports and nitrogen-doped carbon shells would undergo an unexpected nitrogen-doped carbon atomization process against the sintering at high temperatures, during which the nanoparticles can be transformed into more active atomic species. The in situ transmission electron microscopy images reveal the abundant nitrogen defects in carbon shells provide atomic diffusion sites for the mobile atomistic palladium species detached from the palladium nanoparticles. More important, the catalytic activity of sintered and deactivated palladium catalyst can be recovered by this unique N-doped carbon atomization process. Our findings open up a window to preparation of sintering-resistant single atoms catalysts and regeneration of deactivated industrial catalysts.
中文翻译：
通过氮掺杂碳原子化恢复烧结负载型催化剂的活性。
负载型金属纳米粒子的烧结是工业多相催化剂失活的主要途径，这极大地增加了成本并降低了生产率。在这里，我们发现分布在氧化物载体和氮掺杂碳壳界面上的负载型钯/金/铂纳米颗粒在高温下烧结时会经历意想不到的氮掺杂碳雾化过程，在此过程中纳米颗粒可以转化为更活跃的原子种类。原位透射电子显微镜图像揭示了碳壳中丰富的氮缺陷为从钯纳米颗粒上分离的移动原子钯物质提供了原子扩散位点。更重要的是，通过这种独特的氮掺杂碳原子化工艺，可以恢复烧结失活的钯催化剂的催化活性。我们的研究结果为制备抗烧结单原子催化剂和失活工业催化剂的再生打开了一扇窗。
更新日期：2020-01-17
中文翻译：
通过氮掺杂碳原子化恢复烧结负载型催化剂的活性。
负载型金属纳米粒子的烧结是工业多相催化剂失活的主要途径，这极大地增加了成本并降低了生产率。在这里，我们发现分布在氧化物载体和氮掺杂碳壳界面上的负载型钯/金/铂纳米颗粒在高温下烧结时会经历意想不到的氮掺杂碳雾化过程，在此过程中纳米颗粒可以转化为更活跃的原子种类。原位透射电子显微镜图像揭示了碳壳中丰富的氮缺陷为从钯纳米颗粒上分离的移动原子钯物质提供了原子扩散位点。更重要的是，通过这种独特的氮掺杂碳原子化工艺，可以恢复烧结失活的钯催化剂的催化活性。我们的研究结果为制备抗烧结单原子催化剂和失活工业催化剂的再生打开了一扇窗。
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