文献类型：期刊文献

英文题名：Mo-Based Ultrasmall Nanoparticles on Hierarchical Carbon Nanosheets for Superior Lithium Ion Storage and Hydrogen Generation Catalysis

作者：Chen, Ling[1];Jiang, Hao[1];Jiang, Haibo[1];Zhang, Haoxuan[1];Guo, Shaojun[2,3];Hu, Yanjie[1];Li, Chunzhong[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Ultrafine Mat, Minist Educ, Shanghai 200237, Peoples R China;[2]Peking Univ, Coll Engn, Dept Mat Sci & Engn, Beijing 100871, Peoples R China;[3]Peking Univ, Coll Engn, BIC ESAT, Beijing 100871, Peoples R China

年份：2017

卷号：7

期号：15

外文期刊名：ADVANCED ENERGY MATERIALS

收录：;EI(收录号：20171803637026);WOS:【SCI-EXPANDED(收录号:WOS:000407275300011)】；

基金：This work was supported by the National Natural Science Foundation of China (21522602, 51672082, 91534202, and 51671003), the National Key Research and Development Program of China (2016YFB0100201), the International Science and Technology Cooperation Program of China (2015DFA51220), the Research Project of Chinese Ministry of Education (113026A), the Program for Shanghai Youth Top-notch Talent, and the Fundamental Research Funds for the Central Universities.

语种：英文

外文关键词：Carbides - Hydrogen storage - Nanoparticles - Anodes - Carbon - Ions - Hydrogen production - Molybdenum oxide - Flocculation - Nanocrystals - Lithium-ion batteries - Nanosheets

摘要：Constructing 3D hierarchical architecture consisting of 2D hybrid nanosheets is very critical to achieve uppermost and stable electrochemical performance for both lithium-ion batteries (LIBs) and hydrogen evolution reaction (HER). Herein, a simple synthesis of uniform 3D microspheres assembled from carbon nanosheets with the incorporated MoO2 nanoclusters is demonstrated. The MoO2 nanoclusters can be readily converted into the molybdenum carbide (Mo2C) nanocrystals by using high temperature treatment. Such assembling architecture is highly particular for preventing Mo-based ultrasmall nanoparticles from coalescing or oxidizing and endowing them with rapid electron transfer. Consequently, the MoO2/C hybrids as LIB anode materials deliver a specific capacity of 625 mA h g(-1) at 1600 mA g(-1) even after 1000 cycles, which is among the best reported values for MoO2-based electrode materials. Moreover, the Mo2C/C hybrids also exhibit excellent electrocatalytic activity for HER with small overpotential and robust durability in both acid and alkaline media. The present work highlights the importance of designing 3D structure and controlling ultrasmall Mo-based nanoparticles for enhancing electrochemical energy conversion and storage applications.