文献类型：期刊文献

英文题名：Synergistic La/Ce engineering in CuY@NiAl-LDO dual-functional catalysts for highly efficient COS hydrolysis and removal

作者：Wang, Lan[1];Jiang, Hao[1];Zhou, Yousheng[1];Wen, Haiyang[1];Cui, Yupeng[1];Xu, Mengna[1];Jiang, Zhenwu[1];Gao, Wenhao[1];Zhang, Keqian[1];Liu, Chuanlei[1];Shen, Benxian[1,2];Sun, Hui[1,2,3]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Int Joint Res Ctr Green Energy Chem Engn, Shanghai 200237, Peoples R China;[3]Xinjiang Univ, Sch Chem Engn & Technol, Key Lab Oil & Gas Fine Chem, Minist Educ, Urumqi 830046, Peoples R China

年份：2026

卷号：413

外文期刊名：MICROPOROUS AND MESOPOROUS MATERIALS

收录：;EI(收录号：20262320865715);WOS:【SCI-EXPANDED(收录号:WOS:001793134800001)】；

基金：This work is financially supported by the National Natural Science

语种：英文

外文关键词：Carbonyl sulfide; Integrated desulfurization; Dual-functional composite; Rare-earth co-doping; Hydrolysis-adsorption coupling

摘要：Removing carbonyl sulfide (COS) from industrial gas streams remains challenging because it is weakly adsorbed and exhibits low reactivity. Conventional two-step schemes, COS hydrolysis followed by separate H2S capture, are energy-intensive and operationally complex. Herein, we designed a dual-functional La/Ce co-doped CuY@NiAl-LDO composite that integrates COS hydrolysis with in situ H2S capture. The co-doped composite shows higher surface basicity, increased oxygen-vacancy density, and a hierarchical pore network. Under dynamic breakthrough conditions (80 degrees C; GHSV = 3000 h- 1), the composite achieves a sulfur capacity of 46.32 mgS & sdot;g- 1, with no H2S detected at the outlet. This performance markedly exceeds that of the undoped and singly doped samples. DFT calculations based on adsorption and transition-state analyses indicate that La/Ce co-doping facilitates the adsorption and activation of COS and H2O on the oxide domain, lowers the activation barrier of the rate-determining hydrolysis step, and strengthens the selective adsorption of H2S on the CuY adsorption domain. Collectively, these effects suppress catalyst deactivation. This work provides a practical strategy for the rational design of high-performance materials for integrated desulfurization.