Ni-Co、Ni-Cu双金属合金催化剂用于CO甲烷化

Ni-Co and Ni-Cu bimetallic alloy catalysts for CO methanation

以钙钛矿型复合氧化物LaNi0.9Co0.1O3和LaNi0.9Cu0.1O3为前驱体制备了Ni-Co/La2O3和Ni-Cu/La2O3双金属合金催化剂。结果表明,双金属合金催化剂中,各组分间相互稀释,具有较强的抗烧结性能;催化剂表面的积炭主要取决于CO在催化剂表面的吸附形态,Ni-Co双金属催化剂中,Co掺杂改变了CO在催化剂表面的吸附形式和吸附强度,使得Ni-Co双金属催化剂具有较强的抗积炭性能。Ni-Co双金属合金催化剂用于CO甲烷化反应时,显现出较好的活性、选择性和稳定性。

Ni-Co/La2O3 and Ni-Cu/La2O3 bimetallic alloy catalysts were prepared by using LaNi 0.9 Co0.1O3 and LaNi 0.9Cu0.1O3 perovskite-type oxides precursors.The results demonstrate that the components are diluted with each other in the bimetallic alloy catalyst and exhibit strong anti-sintering ability.The carbon deposited on the catalyst surface mainly depends on the adsorption state of CO,the modulated adsorption state and adsorption strength of CO contribute to the strong anti-carbon deposition ability of the Ni-Co bimetallic catalysts.The Ni-Co bimetallic alloy catalysts show remarkable activity,selectivity,and stability in the CO methanation reaction.