Optimization of gold-palladium core-shell nanowires towards H(2)O(2) reduction by adjusting shell thickness.
Optimization of gold-palladium core-shell nanowires towards H(2)O(2) reduction by adjusting shell thickness.
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通过调节壳厚度优化金-钯核壳纳米线还原 H2O2
DOI：
10.1039/c9na00726a
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发表时间：
2020-02-18
影响因子：
4.7
通讯作者：
中科院分区：
文献类型：
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作者：
可设计的核-壳纳米粒子由于其可调的电子结构而具有优异的性能，在工业催化、能量转换和化学传感等领域表现出优异的性能。在十六烷基三甲基溴化铵（CTAB）表面活性剂存在下，通过一锅法合成了Au-Pd核壳纳米线（AuichPd @AuPdrich）。Pd壳层的厚度可以通过直接控制Au/Pd进料比来调节，同时保持纳米线的形貌。所获得的具有薄Pd壳的Au 75 Pd 25核壳纳米线显示出对过氧化氢还原的显著增强的活性，灵敏度达到338 μA cm-2 mM-1，线性范围高达10 mM。总之，Pd壳厚度可以用来调节电子结构，从而优化催化活性。通过一锅法成功地合成了具有可调壳厚度的AuRichPd@ AuPdr ich核-壳纳米线，并且它们显示出优化的H2 O2检测活性。
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 (AurichPd@AuPdrich) 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 Au75Pd25 core–shell NWs with a thin Pdrich shell showed significantly enhanced activities towards the reduction of hydrogen peroxide with the sensitivity reaching 338 μA cm−2 mM−1 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. AurichPd@AuPdrich core–shell nanowires with tunable shell-thickness are successfully synthesized via a one-pot route and they show optimized H2O2 detection activity.
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