调控Ni掺杂量增强In2O3催化CO2加氢制甲醇性能

摘要开发高活性、稳定性的铟基催化剂促进二氧化碳加氢制甲醇对推动绿色可持续发展具有重要研究意义。采用共沉淀法成功地将镍引入到氧化铟,有效地调控了该晶体的结构和表面性质。通过表征分析镍含量对催化剂性能的影响,结果显示当氧化铟中镍引入量为2.5%时,镍以高度分散的Ni²⁺形式存在于材料晶体结构中,该分布显著地增加了材料表面的氧空位含量;而当镍引入量达10.0%时,镍不仅以Ni²⁺形态存在,还部分以金属单质形态出现。在260 ℃、3 MPa、空速为8 000 mL·g^-1·h^-1条件下,比较不同镍含量的氧化铟的催化性能,2.5% Ni@In₂O₃展现出较优的催化性能,实现了5.5%的CO₂转化率,36.5%的甲醇选择性,揭示了适量Ni的引入可以优化In₂O₃表面的氧空位,进而增强催化剂的活性。

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	李萍萍
	关林杰
	张龙
	丁茂峰
	徐丹云
	谢德龙

关键词：二氧化碳加氢氧化铟甲醇镍掺杂氧空位

Abstract： The development of indium-based catalysts with high activity and stability for promoting carbon dioxide hydrogenation to methanol is indeed a significance area of research for advancing green and sustainable technologies. The introduction of Ni into indium oxide through the co-precipitation method has been shown to effectively modulate the structure and surface properties of the crystal, leading to enhanced catalytic performance. In results, it was found that at a Ni content of 2.5%, Ni primarily exists as highly dispersed Ni²⁺ within the crystal structure, which significantly increases the oxygen vacancy content on the surface of the material. While at a higher Ni content of 10.0%, Ni exists not only in the form of Ni²⁺, but also partly in the metallic form. Comparing the catalytic performance of indium oxide with different nickel content at 260 ℃, 3 MPa and space velocity of 8 000 mL·g^-1·h^-1, 2.5% Ni@In₂O₃ exhibits better catalytic performance, achieving CO₂ conversion of 5.5% and methanol selectivity of 36.5%. This suggests that controlling the Ni content and its chemical state in indium oxide catalysts can optimize the oxygen vacancy on the surface of In₂O₃ and enhance the activity of catalyst.

Keywords： carbon dioxide hydrogenation In₂O₃ methanol Ni-doped oxygen vacancy

Received 2024-04-20;

Fund:云南省企业基础研究应用基础研究联合专项项目(202101BC070001-016);天津大学浙江研究院基金(绍兴)(2024-QT-0003,2023-ZX-0007,2023X1-0002)。

Corresponding Authors: 徐丹云,副研究员,E-mail:xudanyun_tju@163.com;谢德龙,教授,E-mail:312689934@qq.com。 Email: xudanyun_tju@163.com;312689934@qq.com

About author: 李萍萍(1998-),女,硕士研究生,研究方向为热催化CO₂加氢制甲醇。

引用本文:

李萍萍, 关林杰, 张龙, 丁茂峰, 徐丹云, 谢德龙.调控Ni掺杂量增强In₂O₃催化CO₂加氢制甲醇性能[J]. 化学工业与工程, 2024,41(5): 121-130

LI Pingping, GUAN Linjie, ZHANG Long, DING Maofeng, XU Danyun, XIE Delong.Enhancement of In₂O₃ catalytic performance for CO₂ hydrogenation to methanol by regulating Ni doping[J]. Chemcial Industry and Engineering, 2024,41(5): 121-130

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