作者:Chen, NN (Chen, NaNa)[1 ]; Mo, QJ (Mo, Qijie)[1 ]; He, LQ (He, Liuqing)[1 ]; Huang, XQ (Huang, Xiaoqing)[1,2,3 ]; Yang, LC (Yang, Lichun)[2,3 ]; Zeng, JC (Zeng, Jiachang)[1 ]; Gao, QS (Gao, Qingsheng)[1 ]
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文献类型:Article
Noble-metal-free electrocatalysts are highly desired for the sustainable H-2 production via water electrolysis. Herein, we report on heterostructured MoC-MoP nanoparticles supported by bacterial cellulose-derived N-doped carbon nanofibers (denoted as MoC-MoP/BCNC NFs) as cost-efficient electrocatalysts for hydrogen evolution reaction (HER). As evidenced, the presence of MoC can prevent MoP from coarsening due to the strong interfacial interactions, resulting in ultrafine nanoparticles evenly integrated with conducting N-doped carbon matrix. More importantly, such heterostructured MoC-MoP delivers tailored electronic configurations toward the optimal binding with intermediate H, accomplishing the promoted HER kinetics. Thereby, the MoC-MoP/BCNC NFs exhibit higher HER activity and faster kinetic metrics in comparison with the single-component counterparts (e.g., MoC/BCNC and MoP/BCNC). They afford low overpotentials of 158 and 137 mV to achieve a current density of similar to 10 mV cm(-2) and small Tafel slopes of 58 and 65 mV dec(-1) in 0.5 M H2SO4 and 1.0 M KOH, respectively. Elucidating efficient electrocatalysis on the MoC-MoP interfaces, this work will open up new opportunities for exploring cost-efficient electrocatalysts in sustainable energy conversion. (C) 2019 Elsevier Ltd. All rights reserved.
作者关键词:Hydrogen evolution; Molybdenum carbide; Molybdenum phosphide; Heterostructures; Electronic configuration
KeyWords Plus:REDUCED-GRAPHENE-OXIDE; MOLYBDENUM-CARBIDE; ENERGY-CONVERSION; PHOSPHIDE; NANOSPHERES; NANOSHEETS; NANOWIRES; CATALYSTS; STRATEGY; OXYGEN
通讯作者地址:Gao, QS (通讯作者)
 | Jinan Univ, Dept Chem, Coll Chem & Mat Sci, 601 Huangpu Ave West, Guangzhou 510632, Guangdong, Peoples R China. |
| South China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510640, Guangdong, Peoples R China. |
| South China Univ Technol, Guangdong Prov Key Lab Adv Energy Storage Mat, Guangzhou 510640, Guangdong, Peoples R China. |
地址:
| 基金资助机构 | 授权号 |
|---|---|
| National Natural Science Foundation of China | 21773093 51671089 21433002 |
| Guangdong Natural Science Funds for Distinguished Young Scholars | 2015A030306014 2017B030306004 |
| Guangdong Province Universities and Colleges Pearl River Scholar Funded Scheme | |
| Science and Technology Program of Guangzhou | 201707010268 |
| Open Fund of the Guangdong Provincial Key Laboratory of Advanced Energy Storage Materials | AESM201701 |