通过调整壳层厚度优化金钯核壳纳米线用于还原过氧化氢
Optimization of gold-palladium core-shell nanowires towards HO reduction by adjusting shell thickness.
作者信息
Dong Yongdi, Chen Qiaoli, Cheng Xiqing, Li Huiqi, Chen Jiayu, Zhang Xibo, Kuang Qin, Xie Zhaoxiong
机构信息
State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University Xiamen 361005 P. R. China
College of Chemical Engineering, State Key Laboratory Breeding Base of Green Chemistry Synthesis Technology, Zhejiang University of Technology Hangzhou 310014 China.
出版信息
Nanoscale Adv. 2019 Dec 31;2(2):785-791. doi: 10.1039/c9na00726a. eCollection 2020 Feb 18.
Designable bimetallic core-shell nanoparticles exhibit superb performance in many fields including industrial catalysis, energy conversion and chemical sensing, due to their outstanding properties associated with their tunable electronic structure. Herein, Au-Pd core-shell (AuPd@AuPd) nanowires (NWs) were synthesized through a one-pot facile chemical reduction method in the presence of cetyltrimethyl ammonium bromide (CTAB) surfactant. The thickness of the Pd shell could be adjusted by directly controlling the Au/Pd feeding ratio while maintaining the nanowire morphology. The as-obtained AuPd core-shell NWs with a thin Pd shell showed significantly enhanced activities towards the reduction of hydrogen peroxide with the sensitivity reaching 338 μA cm mM and a linear range up to 10 mM. In sum, Pd shell thickness could be used to adjust the electronic structure, thereby optimizing the catalytic activity.
可设计的双金属核壳纳米粒子由于其与可调电子结构相关的优异性能，在包括工业催化、能量转换和化学传感在内的许多领域都表现出卓越的性能。在此，通过在十六烷基三甲基溴化铵（CTAB）表面活性剂存在下的一锅简便化学还原法合成了金-钯核壳（AuPd@AuPd）纳米线（NWs）。在保持纳米线形态的同时，通过直接控制金/钯进料比可以调节钯壳的厚度。所获得的具有薄钯壳的金钯核壳纳米线对过氧化氢还原表现出显著增强的活性，灵敏度达到338 μA cm mM，线性范围高达10 mM。总之，钯壳厚度可用于调节电子结构，从而优化催化活性。
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