A facile procedure for doping copper species into CeO₂ lattices to prevent ceria from being deactivated and to offer additional active sites for selective H₂S oxidation is reported here. Among the prepared catalysts, porous 10Cu/Ce nanorods with well-defined (100) and (110) reactive planes display excellent catalytic performance, exhibiting H₂S conversion and sulfur selectivity of 100% at 220 °C, which is higher than those of most reported Ce-based catalysts. More importantly, electron transfer from Cu⁺ to Ce⁴⁺ suppresses the transfer of electrons from SO₂ to Ce⁴⁺, leading to inhibition of SO₂ oxidation to surface sulfate , which could deactivate the catalyst. Overall, the results of systematic experimental and theoretical studies prove that copper doping effectively promotes the formation of oxygen vacancies and resistance against SO₂ poisoning. Furthermore, through in situ diffuse reflection infrared Fourier transform spectroscopy investigation and density functional theory calculations, the reaction intermediates in selective H₂S oxidation and mechanism of SO₂ resistance over the Cu-doped CeO₂ catalysts are revealed.

这里报道了一种将铜物质掺杂到CeO ₂晶格中的简便方法，以防止二氧化铈失活并为选择性H ₂ S氧化提供额外的活性位点。在制备的催化剂中，具有明确的（100）和（110）反应面的多孔10Cu / Ce纳米棒显示出优异的催化性能，在220°C下具有H ₂ S转化率和100％的硫选择性，高于大多数报道的铈基催化剂。更重要的是，电子从Cu ⁺转移到Ce ⁴⁺抑制了电子从SO ₂转移到Ce ⁴⁺，从而抑制了SO ₂氧化成表面硫酸盐，可能会使催化剂失活。总体而言，系统的实验和理论研究结果证明，铜掺杂有效地促进了氧空位的形成和对SO ₂中毒的抵抗力。此外，通过原位漫反射红外傅里叶变换光谱研究和密度泛函理论计算，揭示了在选择性H ₂ S氧化反应中的反应中间体和对Cu掺杂的CeO ₂催化剂抗SO _2的机理。