负载钯纳米颗粒石墨烯复合材料的制备及吸氢强化机理  

Preparation and Hydrogen Absorption Strengthening Mechanism of Graphene Composites Supported With Palladium Nanoparticles

作　　者：洪建成 孙彦丽 刘喆 严舒 王瑞琪 张慧 白红存[1] HONG Jiancheng;SUN Yanli;LIU Zhe;YAN Shu;WANG Ruiqi;ZHANG Hui;BAI Hongcun(State Key Laboratory of High-Efficiency Utilization of Coal and Green Chemical Engineering,College of Chemistry and Chemical Engineering,Ningxia University,Yinchuan 750021,China;Liupanshan Laboratory,Yinchuan 750004,China;Institute of Systems Engineering,AMS,PLA,Beijing 102300,China)

机构地区：[1]宁夏大学化学化工学院省部共建煤炭高效利用与绿色化工国家重点实验室,宁夏银川750021 [2]六盘山实验室,宁夏银川750004 [3]中国人民解放军军事科学院系统工程研究院,北京102300

出　　处：《石油学报(石油加工)》2025年第1期71-80,共10页Acta Petrolei Sinica(Petroleum Processing Section)

基　　金：中央引导地方科技发展专项(2022FRD05035);六盘山实验室基础科研项目(LPS-2024-KY-D-JC-0022)资助。

摘　　要：基于氧化还原结合浸渍法,制备得到Pd负载的氧化石墨烯。进一步以NaBH 4为还原剂,室温环境下一步还原制备获得不同Pd负载量的还原氧化石墨烯(Pd-rGO)复合材料。利用XRD、FT-IR、Raman、TEM和N 2吸附-脱附等分析手段对材料进行表征,明确不同Pd负载量的Pd-rGO复合材料的结构特征。结果表明:制备得到的Pd-rGO复合材料具有高的缺陷程度以及比表面积,孔径均匀分布于3.9~4.2 nm范围内,Pd纳米粒子粒径平均为5 nm,粒径小且分散均匀;通过对材料进行氢气吸附性能测试,获得了Pd-rGO复合材料的储氢性能,经过Pd负载的石墨烯基于氢溢出效应,使得石墨烯的储氢容量提高最大达到64.7%。此外,通过密度泛函理论计算对该复合体系强化储氢机理进行了计算和分析。Pd supported graphene oxides were prepared based on redox and impregnation method.Further,reduced graphene oxide(Pd-rGO)composites with different Pd loadings were prepared by one-step reduction at room temperature using NaBH 4 as reducing agent.The composites were characterized by XRD,FT-IR,Raman,TEM and N 2 adsorption-desorption,and the structural characteristics of Pd-rGO composites with different Pd loadings were clarified.The results show that the prepared Pd-rGO composites have high defect degree and specific surface area,and the pore size is uniformly distributed in the range of 3.9 nm to 4.2 nm.Pd nanoparticles have an average particle size of 5 nm,which are characterized by small particle sizes and uniform dispersion.The hydrogen storage performance of Pd-rGO composite was obtained by testing their hydrogen adsorption performance.The hydrogen adsorption capacity of Pd-rGO can be increased up to 64.7%based on the hydrogen spillover effect.In addition,the intensified hydrogen storage mechanism of the composite system was analyzed by density functional theory calculations.

关 键 词：多孔复合材料 储氢 石墨烯 钯金 分子模拟 

分 类 号：TB34[一般工业技术—材料科学与工程]