题目： | Coupling of nanocrystal hexagonal array and two-dimensional metastable substrate boosts H2-production |
作者： | Zhenglong Fan1,2#, Fan Liao1#, Yujin Ji1#, Yang Liu1*, Hui Huang1, Dan Wang3, Kui Yin1, Haiwei Yang1, Mengjie Ma1, Wenxiang Zhu1, Meng Wang1, Zhenhui Kang1,4*, Youyong Li1, Mingwang Shao1*, Zhiwei Hu5* and Qi Shao2* |
单位： | 1Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou, 215123, Jiangsu, China. 2College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, Jiangsu, China. 3College of Energy, Soochow University, Suzhou, 215123, Jiangsu, China. 4Macao Institute of Materials Science and Engineering, Macau University of Science and Technology, Taipa 999078, Macau SAR, China. 5Max Planck Institute for Chemical Physics of Solids, Nothnitzer Strasse 40, Dresden 01187, Germany. |
摘要： | Designing well-ordered nanocrystal arrays with subnanometre distances can provide promising materials for future nanoscale applications. However, the fabrication of aligned arrays with controllable accuracy in the subnanometre range with conventional lithography, template or self-assembly strategies faces many challenges. Here, we report a two-dimensional layered metastable oxide, trigonal phase rhodium oxide (space group, P-3m1 (164)), which provides a platform from which to construct well-ordered face-centred cubic rhodium nanocrystal arrays in a hexagonal pattern with an intersurface distance of only 0.5 nm. The coupling of the well-ordered rhodium array and metastable substrate in this catalyst triggers and improves hydrogen spillover, enhancing the acidic hydrogen evolution for H2 production, which is essential for various clean energy-related devices. The catalyst achieves a low overpotential of only 9.8 mV at a current density of -10 mA cm-2, a low Tafel slope of 24.0 mV dec-1, and high stability under a high potential (vs. RHE) of -0.4 V (current density of ~750 mA cm-2). This work highlights the important role of metastable materials in the design of advanced materials to achieve high-performance catalysis. |
影响因子： | 14.919 |
分区情况： | 一区 |
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责任编辑：郭佳