碳化
化学
沸石咪唑盐骨架
柯肯德尔效应
化学工程
电化学
纳米颗粒
催化作用
甲醇
咪唑酯
纳米技术
分散性
金属有机骨架
吸附
电极
无机化学
材料科学
有机化学
物理化学
工程类
作者
Ming Ge,Han Li,Xiaorong Zhu,Yanjun Feng,Miao Wang,Ding Cui,Yang Hu,Shengming Li,Jun Zheng,Jianfeng Ju,Xiaolei Chen,Xiaolei Yuan
标识
DOI:10.1021/acs.inorgchem.3c02519
摘要
Confinement effects in highly porous nanostructures can effectively adjust the selectivity and kinetics of electrochemical reactions, which can boost the methanol oxidation reaction (MOR). In this work, carbonized ZIF-8-confined hollow PtCo nanospheres (PtCo@carbonized ZIF-8) were fabricated using a facile strategy. A monodisperse confined region was successfully prepared, and the dispersion of the PtCo nanoparticles (NPs) could be precisely regulated, allowing for the effective tuning of the confined region. Thus, the precise regulation of the catalytic reaction was achieved. Importantly, hollow PtCo NPs were prepared using a method based on the Kirkendall effect, and their forming mechanism was systematically investigated. Because of the confinement effects of carbonized zeolitic imidazolate framework-8 (ZIF-8), the crystal and electronic structures of the PtCo NPs were able to be effectively tuned. Our electrochemical results show that PtCo@carbonized ZIF-8 composites manifest a higher mass activity (1.4 A mgPt–1) and better stability compared to commercial Pt/C.
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