Daowei Gao, Juan Chen, Yanao Zhang, Yunrui Li, Lidan Zhu, Yipin Lv, Yuchen Qin, Jiawei Zhang, Yuming Dong, Yongfa Zhu, Yao Wang
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引用次数: 0
摘要
通过抑制中间负载的生成来构建高效的铂基甲醇氧化反应催化剂是人们迫切需要的，也是一个巨大的挑战。本文记录了保持o桥接三位点的概念，通过在MOR过程中形成HCOO -物种来增强“非co”途径的选择性。通过在PtPd纳米片上接枝单原子Ga位点得到的Ga- o -PtPd三位点，获得了高达3.05 mAcm−2的MOR电流密度，是商用Pt/C （0.54 mAcm−2）的5.65倍，并且具有良好的稳定性和负载抗毒性。CO漫反射红外傅里叶变换光谱（CO- drifts）结果表明，Ga-O-PtPd三位点具有较弱的CO结合能力，减少了COads中间体的生成。此外，与商业催化剂相比，ga - o - ptpd基锌-甲醇-空气电池具有优异的活性和稳定性。
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.
期刊介绍：
Established in 2011, Advanced Energy Materials is an international, interdisciplinary, English-language journal that focuses on materials used in energy harvesting, conversion, and storage. It is regarded as a top-quality journal alongside Advanced Materials, Advanced Functional Materials, and Small.
With a 2022 Impact Factor of 27.8, Advanced Energy Materials is considered a prime source for the best energy-related research. The journal covers a wide range of topics in energy-related research, including organic and inorganic photovoltaics, batteries and supercapacitors, fuel cells, hydrogen generation and storage, thermoelectrics, water splitting and photocatalysis, solar fuels and thermosolar power, magnetocalorics, and piezoelectronics.
The readership of Advanced Energy Materials includes materials scientists, chemists, physicists, and engineers in both academia and industry. The journal is indexed in various databases and collections, such as Advanced Technologies & Aerospace Database, FIZ Karlsruhe, INSPEC (IET), Science Citation Index Expanded, Technology Collection, and Web of Science, among others.
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