题目: | Metastable Hexagonal Phase SnO2 Nanoribbons with Active Edge Sites for Efficient Hydrogen Peroxide Electrosynthesis in Neutral Media |
作者: | Yi Zhang1, Mengwen Wang1, Wenxiang Zhu1, Miaomiao Fang2, Mengjie Ma1, Fan Liao1*, Hao Yang1*, Tao Cheng1, Chih-Wen Pao3, Yu-Chung Chang3, Zhiwei Hu4, Qi Shao2*, Mingwang Shao1*, and Zhenhui Kang1,5* |
单位: | 1Institute of Functional Nano and Soft Materials (FUNSOM), Soochow University, Suzhou 215123, China 2College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China 3National Synchrotron Radiation Research Center, 101 Hsin-Ann Road, Hsinchu 30076, Taiwan 4Max Planck Institute for Chemical Physics of Solids, Nöthnitzer Strasse 40, Dresden 01187, Germany 5Macao Institute of Materials Science and Engineering (MIMSE), MUST−SUDA Joint Research Center for Advanced Functional Materials, Macau University of Science and Technology, Taipa 999078, Macao, China |
摘要: | Electrochemical two-electron oxygen reduction reaction (2e- ORR) to produce hydrogen peroxide (H2O2) is a promising alternative to the energetically intensive anthraquinone process. However, there remain challenges in designing 2e- ORR catalysts that meet the application criteria. Here, we successfully adopt a microwave-assisted mechanochemical-thermal approach to synthesize hexagonal phase SnO2 (h-SnO2) nanoribbons with largely exposed edge structures. In 0.1 M Na2SO4 electrolyte, the h-SnO2 catalysts achieve the excellent H2O2 selectivity of 99.99%. Moreover, when employing as the catalyst in flow cell device, they exhibit a high yield of 3885.26 mmol g-1 h-1. The enhanced catalytic performance is attributed to the special crystal structure and morphology, resulting in abundantly exposed edge active sites to convert O2 to H2O2 as confirmed by density functional theory calculations. |
影响因子: | 16.823 |
分区情况: | 一区 |
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责任编辑:郭佳