Acetylene chemical process, especially catalyzing acetylene acetoxylation for the synthesis of vinyl acetate (VAc), has attracted wide attention in coal-rich countries. Although great efforts have been made to prepare different catalysts to improve the VAc synthesis via acetylene acetoxylation, the acetic acid (HAc) conversion cannot achieve a satisfactory level, much lower than 60%. Herein, ZnO nanoparticles in situ wrapped on zinc-nitrogen-carbon materials (ZnO@ Zn–N–C) have been successfully synthesized. Due to the simultaneous presence of nitrogen and carbon in chitosan, the obtained carbon material achieved in situ nitrogen doping during the high-temperature treatment. Furthermore, the as-obtained ZnO@Zn–N–C exhibits high specific surface area of 1430.1 m 2 /g and pore volume of 0.92 cm 3 /g, because Zn composites have the ability to etch carbon to form pores. In particular, ZnO@Zn–N–C displays an amazing catalytic activity for acetylene acetoxylation to synthesize VAc with the HAc conversion high up to 88.8%, which is much higher than those reported in other papers before. Graphic Abstract

中文翻译：

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锌和氮掺杂的碳原位包裹的 ZnO 纳米颗粒作为乙炔乙酰氧基化的高活性催化剂

乙炔化学工艺，特别是催化乙炔乙酰氧基化合成乙酸乙烯酯（VAc），在煤炭丰富的国家引起了广泛关注。尽管已经做出很大努力来制备不同的催化剂以通过乙炔乙酰氧基化来改善 VAc 的合成，但乙酸 (HAc) 的转化率无法达到令人满意的水平，远低于 60%。在此，已成功合成了原位包裹在锌-氮-碳材料上的 ZnO 纳米颗粒（ZnO@Zn-N-C）。由于壳聚糖中同时存在氮和碳，得到的碳材料在高温处理过程中实现了原位氮掺杂。此外，所获得的 ZnO@Zn-N-C 具有 1430.1 m 2 /g 的高比表面积和 0.92 cm 3 /g 的孔体积，因为锌复合材料具有蚀刻碳形成气孔的能力。特别是，ZnO@Zn-N-C 对乙炔乙酰氧基化合成 VAc 具有惊人的催化活性，HAc 转化率高达 88.8%，远高于之前其他论文报道的转化率。图形摘要