Porous core–shell structured MoO2–Mo2C@C electrocatalysts for pH-universal hydrogen evolution reaction
Literature Information
Tingxi Chen, Ning Lu, Feiyu Jian, Bin Zhu, Liang He, Hui Tang
Developing pH-universal and stable electrocatalysts for processes such as the hydrogen evolution reaction (HER) is challenging but necessary to achieve low-cost commercialization of hydrogen production. In this work, a facile and versatile method of carbon coating is developed to construct a MoO2, Mo2C and C core–shell heterostructure (MoO2–Mo2C@C). This heterostructure showed excellent HER performance in both acidic and alkaline solutions. The catalysts required overpotentials of 176 mV and 129 mV to reach a current density of 10 mA cm−2 in acidic and alkaline solutions, respectively. Furthermore, the catalysts exhibited ultra-high structural stability over 200 hours of I–t tests. The results indicated that the porous carbon shell-coated heterojunction provides a MoO2–Mo2C heterostructure with high electrical conductivity, an increased number of active sites, and strong structural stability, thus boosting the HER performance. Theoretical calculations were also conducted to study the formation mechanism of the core–shell heterostructure, which indicated possible pathways for the transformation from MoO2 (011) to Mo2C (100).
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Critical Review. Approaches to Predicting Stability ConstantsA Critical Review
DOI: 10.1039/A607993H
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Journal of Materials Chemistry A

Journal of Materials Chemistry A, B & C cover high quality studies across all fields of materials chemistry. The journals focus on those theoretical or experimental studies that report new understanding, applications, properties and synthesis of materials. The journals have a strong history of publishing quality reports of interest to interdisciplinary communities and providing an efficient and rigorous service through peer review and publication. The journals are led by an international team of Editors-in-Chief and Associate Editors who are all active researchers in their fields. Journal of Materials Chemistry A, B & C are separated by the intended application of the material studied. Broadly, applications in energy and sustainability are of interest to Journal of Materials Chemistry A, applications in biology and medicine are of interest to Journal of Materials Chemistry B, and applications in optical, magnetic and electronic devices are of interest to Journal of Materials Chemistry C. More than one Journal of Materials Chemistry journal may be suitable for certain fields and researchers are encouraged to submit their paper to the journal that they feel best fits for their particular article. Example topic areas within the scope of Journal of Materials Chemistry A are listed below. This list is neither exhaustive nor exclusive. Artificial photosynthesis Batteries Carbon dioxide conversion Catalysis Fuel cells Gas capture/separation/storage Green/sustainable materials Hydrogen generation Hydrogen storage Photocatalysis Photovoltaics Self-cleaning materials Self-healing materials Sensors Supercapacitors Thermoelectrics Water splitting Water treatment













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