Ultrathin MoS2 Nanosheets Decorated Hollow CoP Heterostructures for Enhanced Hydrogen Evolution Reaction
| Autor: | Yuancai Ge, Hang Chu, Pei Dong, Jiyi Chen, Qianyi Feng, Mingxin Ye, William R Smith, Peiyuan Zhuang, Jianfeng Shen |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
Renewable Energy Sustainability and the Environment General Chemical Engineering Heterojunction 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences 0104 chemical sciences Catalysis Template Chemical engineering Environmental Chemistry Metal-organic framework Hydrogen evolution 0210 nano-technology Current density Zeolitic imidazolate framework |
| Zdroj: | ACS Sustainable Chemistry & Engineering. 7:10105-10111 |
| ISSN: | 2168-0485 |
| DOI: | 10.1021/acssuschemeng.9b01575 |
| Popis: | Constructing regularly catalytic arrays is essential for electrochemical catalysis, especially for hydrogen evolution reaction (HER). In this work, two-dimensional zeolitic imidazolate framework (ZIF) arrays were chosen as templates to construct few-layer MoS2-decorated hollow CoP. By coupling MoS2 nanosheets arrays and two-dimensional ZIF-67 derived CoP, the advantages of the active sites of MoS2 nanosheets edges and CoP are combined for efficient HER, which can drive a current density of 100 mA/cm2 in both acid (91 mV) and alkaline (135 mV) solutions for 10 h. Furthermore, the prepared catalyst can reach a current density of 10 mA/cm2 with overpotentials of only 53 and 77 mV in 0.5 M H2SO4 and 1 M KOH, respectively. Most importantly, we believe replacing ZIF-67 powders with 2D ZIF-67 arrays can boost the electrochemical activities for HER and this method can provide us a guideline for the future application of two-dimensional ZIF-67 arrays to construct efficient electrocatalysts. |
| Databáze: | OpenAIRE |
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