Oxygen‐Bridged Ga‐O‐PtPd Triple Sites Boost Methanol‐Assisted Rechargeable Zn‐Air Batteries Through Suppressing COads Generation
Daowei Gao, Juan Chen, Yanao Zhang, Yunrui Li, Lidan Zhu, Yipin Lv, Yuchen Qin, Jiawei Zhang, Yuming Dong, Yongfa Zhu, Yao WangAbstract
Constructing high‐efficiency platinum (Pt)‐based catalysts for methanol oxidation reaction (MOR) by suppressing the intermediate COads generation is strongly desired and remains a grand challenge. Herein, the concept of holding O‐bridged triple sites is documented to strengthen “non‐CO” pathway selectivity by forming HCOO− species during MOR. The obtained Ga‐O‐PtPd triple sites via grafting the single‐atomic Ga sites on PtPd nanosheets achieves a high current density of 3.05 mAcm−2 of MOR, which is 5.65 times higher than commercial Pt/C (0.54 mAcm−2), as well as remarkably stability and COads poison resistance. The CO diffuse reflectance infrared Fourier transform spectroscopy (CO‐DRIFTS) results reveal that Ga‐O‐PtPd triple sites present a weak CO binding ability, reducing the generation of COads intermediate. In addition, the Ga‐O‐PtPd‐based Zn‐methanol‐air batteries present an excellent activity and stability compared with commercial catalysts.