近日，中国科学院大连化物所孙剑团队报道了羟基诱导钴氧化物合成气轻烯烃。相关论文于2026年4月1日发表在《自然》杂志上。

轻质烯烃——乙烯、丙烯和丁烯（C₂⁼–C₄⁼）——是化学工业中至关重要的基础原料，传统上通过烃类原料的热裂化或催化裂化生产。在温和条件下将合成气（CO和H₂）直接转化为轻质烯烃具有吸引力，但也充满挑战。棱柱状碳化钴（Co₂C）及其相关的疏水改性已在温和条件下展现出选择性合成轻质烯烃的潜力。

研究组展示了另一种亲水促进策略：将一组羟基促进剂（例如羟基磷灰石 Ca₅(PO₄)₃(OH)，HAP；气相二氧化硅 SiO₂(F)；以及无定形勃姆石AlO(OH)，AB）与Co₂MnO₄ 前驱体物理混合，从而诱导钴锰（Co–Mn）氧化物和Co₂C协同催化合成气转化。所诱导的三斜Co–Mn氧化物可作为活性相，促进吸附氢辅助的CO解离生成 CH_x/CH_xO 中间体；而诱导生成的Co₂C或Co₂C–氧化物界面则可介导这些中间体的C–C偶联反应，生成轻质烯烃。

该设计在250–260 °C、0.1 MPa、H₂/CO比为 1–2 的条件下，实现了 70–82% 的CO转化率，轻质烯烃选择性超过60%，轻质烯烃碳利用率高达13%，这是目前已报道的合成气制轻质烯烃的最高水平之一。这种用于促进CO活化的简单亲水策略，可为改进工业费托工艺提供有益的见解。

附：英文原文

Title: Hydroxy-induced cobalt oxides for syngas to light olefins

Author: Han, Yu, Yu, Jiafeng, Wei, Jian, Fang, Chuanyan, Han, Jianxiang, Sun, Yannan, Chen, Huaican, Yin, Wen, Tan, Li, Wang, Ning, Ge, Qingjie, Sun, Jian

Issue&Volume: 2026-04-01

Abstract: Light olefins—ethylene, propylene and butylene (C2=–C4=)—are essential building blocks in the chemicals industry and are traditionally produced by thermal or catalytic cracking of hydrocarbon feedstocks. Directly converting syngas (CO and H2) into light olefins under mild conditions is attractive but challenging1,2,3,4. Prismatic cobalt carbide (Co2C) and associated hydrophobic modifications have shown potential for selective light-olefin synthesis under mild conditions5,6. Here we show another hydrophilic-promotion strategy in which a set of hydroxy promoters, exemplified by hydroxyapatite (Ca5(PO4)3(OH), HAP), fumed silica (SiO2(F)) and amorphous boehmite (AlO(OH), AB), is physically mixed with a Co2MnO4 precursor, inducing synergistic cobalt–manganese (Co–Mn) oxides and Co2C for syngas conversion. The induced anorthic Co–Mn oxides may serve as active phase for adsorbed-hydrogen-assisted CO dissociation to CHx/CHxO intermediates, whereas induced Co2C or the Co2C–oxide interface may mediate C–C coupling of these intermediates to form light olefins. This design achieved 70–82% CO conversion with light-olefins selectivity of more than 60% at 250–260°C, 0.1MPa with H2/CO ratios of 1–2, giving light-olefins carbon utilization efficiency up to 13%, among the highest reported for syngas to light olefins. This simple hydrophilic strategy for facilitating CO activation may provide useful insights for improving industrial Fischer–Tropsch processes.

DOI: 10.1038/s41586-026-10204-4

Source: https://www.nature.com/articles/s41586-026-10204-4