Effects of pores structure of MgO-templated combined with KOH active porous carbon on its supported Pt catalysts for enhanced electrocatalytic reactions

催化作用 多孔性 活性炭 化学工程 材料科学 碳纤维 化学 有机化学 复合数 复合材料 废物管理 工程类
作者
Yang Sun,Jianfeng Wang,Siyuan Sun,Haojia Zhong,Kexin Wei,Hongchen Liu,Qiang Wei,Yongfeng Li,Fan Yang
出处
期刊:Green chemical engineering [Elsevier BV]
卷期号:7 (3): 298-308 被引量:5
标识
DOI:10.1016/j.gce.2024.11.004
摘要

Pore structures in carbon materials have been referred to regulate the properties of carbon, which are meaningful for improving electro-catalytic performance. Herein, a series of Pt-based porous carbon catalysts (Pt/MPC) are synthesized, which are used in hydrogen evolution reaction (HER), oxygen reduction reaction (ORR), and methanol oxidation reaction (MOR). The coupling of template method and KOH activation is used to synthesize carbon carrier, then Pt NPs are loaded on it by NaBH 4 reduction. The well-tuned catalyst Pt/MPC (131) exhibits an overpotential of 34 mV and 23 mV at the current density of 10 mA cm -2 in 1.0 M KOH and 0.5 M H 2 SO 4 for HER (under 5.76 wt% Pt load), respectively. The micropore regulated by KOH provides a high ion-accessible surface, and mesoporous formed by MgO template provide a fast channel for ion transport, which leads to great electron transport and increased exposure of Pt. Besides, the MOR activity of Pt/MPC (131) is 1932.1 mA mg -1 , which is 2.43 times higher than that of commercial 20 wt% Pt/C (791.6 mA mg -1 ), and has half-wave potential of 0.84 V on ORR. The abundant hierarchical pores and highly utilized Pt active sites are favorable for accelerating the sluggish kinetics of HER, MOR, and ORR. This work provides an anticipated perspective of applicable Pt-based catalyst for advanced electrocatalysts. • Pt/MPC (131) can be widely applicable catalyst for MOR, ORR, and HER. • Template orientation combined with KOH activation leads to hierarchical porous tunable catalysts. • Abundant pores and highly utilized Pt accelerate the sluggish kinetic in electrochemistry.
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