Adsorption and dissociation of H₂O along with the generated hydroxide ions (OH^–) over catalyst plays key role in the carbonyl sulfur (COS) hydrolysis. Herein, we report a variety of magnesium aluminum layered double hydroxides nanosheet with abundant structural defects (MA-LDHs-SD-x) designed by a mechanochemistry method using white carbon black as the defects directing agent. The resulted MA-LDHs-SD-x possess abundant structural defects along with much enlarged BET surface area and pore volume (175 m²/g and 0.347 cm³/g vs 32 m²/g and 0.039 cm³/g), which provide enhanced amount of surface OH^– base sites, tight and rigid diffusion channels for guest molecules. As expected, the MA-LDHs-SD-x were found to be rather active in catalyzing COS hydrolysis, nearly 100% conversion and selectivity can be achieved at only 30 °C without H₂O in a span of 96 h through a hydroxyl chemical looping route, which showing potential application value in the industrial desulfuration.

_{H 2} O 与生成的氢氧根离子 (OH ^– ) 在催化剂上的吸附和解离在羰基硫 (COS) 水解中起关键作用。在此，我们报道了多种结构缺陷丰富的镁铝层状双氢氧化物纳米片（MA-LDHs-SD-x），采用机械化学方法，使用白炭黑作为缺陷导向剂。得到的 MA-LDHs-SD-x 具有丰富的结构缺陷，同时 BET 表面积和孔体积也大大增加（175 m ² /g 和 0.347 cm ³ /g vs 32 m ² /g 和 0.039 cm ³ /g），这提供更多的表面 OH ^–客体分子的碱基位点，紧密而刚性的扩散通道。正如预期的那样，发现 MA-LDHs-SD-x 在催化 COS 水解方面具有相当的活性，在没有 H ₂ O 的情况下，仅在 30 °C 下通过羟基化学品在 96 小时内即可实现近 100% 的转化率和选择性。循环路线，在工业脱硫中显示出潜在的应用价值。