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摘要
通过常温液相法制备了核壳结构Au@Pd/C催化剂和AuPd合金催化剂。利用XRD、TEM和电化学测试等手段对催化剂的组成、结构和催化甲醇氧化性能进行了表征。结果表明,2种催化剂的粒径均为20 nm左右;由于Au核的存在,Au@Pd/C催化剂有效增加了Pd的活性面积,提高了催化甲醇的氧化活性和稳定性;降低了Pd的还原电位,提高了其抗CO中毒的能力。
Abstract
Au@Pd/C catalysts with core-shell structure and AuPd alloy catalysts are prepared by simple and mild liquid phase method.XRD,TEM and electrochemical measurements are used to characterize the catalysts' composition,structure and catalytic performance for methanol oxidation.The results show that the particle sizes of both two catalysts are around 20 nm.Due to the presence of Au nucleus,Au@Pd/C catalyst effectively increases the active area of Pd and enhances the activity and stability in catalytic methanol oxidation.At the same time,the reduction potential of Pd is reduced and its anti-CO poisoning ability is improved.
关键词
Au@Pd
/
甲醇氧化
/
电化学
/
AuPd合金
Key words
Au@Pd
/
methanol oxidation
/
electrochemistry
/
AuPd alloy
Au@Pd催化剂的制备及其催化甲醇氧化反应的研究[J].
现代化工, 2020, 40(7): 133-135,140 DOI:10.16606/j.cnki.issn0253-4320.2020.07.028