Zhi Guo, Wang Wenxin, Zhou Yang, Feng Ligang
School of Medicine, Zhangjiakou University, Zhangjiakou, 075000, PR China.
School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, 225002, PR China.
Nanoscale. 2023 Feb 9;15(6):2948-2953. doi: 10.1039/d2nr06819b.
Metal-support interaction plays an important role in the catalysis reaction, and an effective support is highly desired in the hybrid catalyst construction. Herein, we demonstrated an effective catalyst system by coupling Pt nanoparticles over the ZIF-67-derived CoP/NC support for methanol oxidation reaction (MOR) in acidic and alkaline solutions. The results indicated that the Pt-CoP/NC catalyst showed high catalytic activity and stability for MOR owing to the oxophilic properties of CoP and the strong metal-support interaction, as well supported by the electrochemical measurements and the spectroscopic analysis, which far exceeded that of the Pt-Co/NC and commercial Pt/C catalysts. Specifically, the forward peak current density of the Pt-CoP/NC catalyst was 74.2 mA cm for MOR in an acidic electrolyte, which was 2.2 times higher than that of a commercial Pt/C catalyst. Further, in an alkaline electrolyte, the Pt-CoP/NC catalyst showed the highest forward peak current density of 118.6 mA cm, which was 4.5 times higher than that of a commercial Pt/C catalyst. High catalytic kinetics and stability for MOR were also carefully discussed. Moreover, the Pt-CoP/NC catalyst exhibited excellent anti-poisoning ability in comparison to the Pt-Co/NC and commercial Pt/C catalysts with the help of the CO-stripping technique. The current work would be instructive for high-performance catalyst system construction based on the ZIF-67-derived CoP/NC support.
金属-载体相互作用在催化反应中起着重要作用，在混合催化剂的构建中非常需要一种有效的载体。在此，我们通过在ZIF-67衍生的CoP/NC载体上负载Pt纳米颗粒，展示了一种用于酸性和碱性溶液中甲醇氧化反应（MOR）的有效催化剂体系。结果表明，由于CoP的亲氧性质和强金属-载体相互作用，Pt-CoP/NC催化剂对MOR表现出高催化活性和稳定性，电化学测量和光谱分析也证实了这一点，其性能远远超过了Pt-Co/NC和商业Pt/C催化剂。具体而言，在酸性电解质中，Pt-CoP/NC催化剂用于MOR的正向峰值电流密度为74.2 mA cm，比商业Pt/C催化剂高2.2倍。此外，在碱性电解质中，Pt-CoP/NC催化剂表现出最高的正向峰值电流密度118.6 mA cm，比商业Pt/C催化剂高4.5倍。还仔细讨论了MOR的高催化动力学和稳定性。此外，借助CO脱附技术，与Pt-Co/NC和商业Pt/C催化剂相比，Pt-CoP/NC催化剂表现出优异的抗中毒能力。当前的工作将为基于ZIF-67衍生的CoP/NC载体构建高性能催化剂体系提供指导。
