低碳化学与化工2026，Vol.51Issue(8)：22-29,8.DOI:10.12434/j.issn.2097-2547.20250488
n(Pd)/n(Pt)对Pd-Pt/Al2O3催化甲烷燃烧性能的影响
Effects of n(Pd)/n(Pt)on performances of Pd-Pt/Al2O3 catalysts for methane catalytic combustion
摘要
Abstract
Methane catalytic combustion is a key method for controlling methane emissions.However,the deactivation of Pd-based catalysts due to sintering under reaction conditions limits their industrial application,and the development of catalysts that combine high catalytic activities with excellent anti-sintering properties is a key challenge in this field.To elucidate the effects of n(Pd)/n(Pt)on the sizes of active species and the catalytic performances of Pd-Pt bimetallic catalysts,Pd-Pt/Al2O3 bimetallic catalysts with varying n(Pd)/n(Pt)were prepared by impregnation method,with keeping the total loading amount(mass fraction)of Pd and Pt at 0.46%.The physicochemical properties of the catalysts were investigated by characterization methods such as XRD and N2 adsorption/desorption.The performances of the catalysts for methane catalytic combustion were investigated in a fixed-bed reactor.The results indicate that in the Pd-Pt/Al2O3 bimetallic catalyst with n(Pd)/n(Pt)=12.2(Pd-Pt/Al2O3(12.2)),the Pd/Pt species consist of sub-nanometre clusters ranging in size from 0.5 nm to 2.0 nm,and the Pd/Pt species are preferentially located at pentacoordinate AlO5 sites via oxygen-bridge bonds.Pd-Pt/Al2O3(12.2)exhibits both good catalytic activity and stability,with T50(the reaction temperature at which the methane conversion rate reaches 50%)of 396 ℃ and deactivation rate of 0.0082%/h.关键词
甲烷催化燃烧/Pd基催化剂/双金属催化剂/Pd-Pt界面Key words
methane catalytic combustion/Pd-based catalysts/bimetallic catalysts/Pd-Pt interface分类
化学化工引用本文复制引用
刘赛,刘安秀,籍弘光,王晓波,张云峰,陈俊涛,王若蕾,张鑫,乔增建,蒙文军,王虎..n(Pd)/n(Pt)对Pd-Pt/Al2O3催化甲烷燃烧性能的影响[J].低碳化学与化工,2026,51(8):22-29,8.基金项目
国家自然科学基金青年科学基金(52004177). （52004177）
