甲醇
催化作用
溶解
多孔性
材料科学
纳米颗粒
电催化剂
碳纤维
复合材料
化学工程
甲醇燃料
无机化学
复合数
化学
纳米技术
有机化学
电化学
工程类
电极
物理化学
作者
Yang Sun,Fan Yang,Siyuan Sun,Yankun Sun,Hongchen Liu,Chunhui Yu,Junpu An,Xi Li,Yongfeng Li
出处
期刊:Fuel
[Elsevier BV]
日期:2024-03-05
卷期号:366: 131399-131399
被引量:6
标识
DOI:10.1016/j.fuel.2024.131399
摘要
The preparation of highly active and stable Pd-based catalysts for direct alcohol fuel cells (DAFC) is hampered by inefficient utilization of the active sites, susceptibility to CO poisoning, poor stability, and relatively slow reaction kinetics. Herein, the stability and anti-toxicity of the catalysts (Pd/ZnO/MDC) are tuned by loading Pd nanoparticles on the carbon-coated ZnO support, achieving efficient electrocatalysis for methanol and ethanol oxidation reaction (MOR and EOR). TEM result shows the ZnO is covered by the carbon layer formed outside of MOF-5 derived porous carbon, which can prevent it from dissolving under harsh conditions. The mass activities of the well-tuned catalyst Pd/ZnO/MDC(8 0 0) for MOR and EOR are 931.83 mA/mg and 1838.30 mA/mg, respectively. It is due to the improved electron transport efficiency between the Pd and ZnO, and the enhanced stability by carbon layer outside the ZnO. It is also found that the onset potential and the peak potential of Pd/ZnO/MDC(8 0 0) (−0.813 V, −0.228 V) in CO stripping experiment in MOR are more negative than Pd/MDC(8 0 0) (−0.261 V, −0.215 V). This result indicates that the existence of ZnO helps to provide surface hydroxyl group, which promotes the oxidation of the intermediates. This work indicates provides a feasible idea for DAFC catalyst design and construction.
科研通智能强力驱动
Strongly Powered by AbleSci AI