College of Chemical Engineering and Technology, College of Chemistry, Taiyuan University of Technology, 030024, Taiyuan, P. R. China.
Shanxi Kunming Tobacco Co. Ltd., 21 Dachang South Road, 030032, Taiyuan, P. R. China.
Chem Asian J. 2023 Jun 15;18(12):e202300292. doi: 10.1002/asia.202300292. Epub 2023 May 22.
Molybdenum carbide is one of non-precious metal materials and it is a promising electrocatalyst for hydrogen production. Synthesis and improvement of molybdenum carbide's catalytic performance is of great significance. Herein, carbon-based Mo C with hybrid phase of MoO was fabricated by matching the composition of Mo and C derived from pomelo peel and optimizing raw carbon amount and prolysis temperature. The resulting MoO /Mo C@C is composed of loose microspheres with mesoporous microstructure and is self-assembled from nanoparticles. The results show that MoO /Mo C@C2 material exhibits excellent HER performance and only a low overpotentials of 143 mV is needed to drive the current density of 10 mA cm in alkaline solution, and Tafel slopes are only 63.4 mV dec , respectively. Notably, it has potential application at low overpotentials to drive large current density and this strategy also provides a universal route to prepare non-noble metal catalyst with hybrid phase of oxide/carbide.
碳化钼是一种非贵金属材料，它是一种很有前途的制氢电催化剂。碳化钼的合成和催化性能的提高具有重要意义。本文通过匹配柚子皮衍生的 Mo 和 C 的组成，并优化原料碳的量和热解温度，制备了具有 MoO 混合相的基于碳的 Mo C。所得到的 MoO/MoC@C 由具有介孔微结构的疏松微球组成，由纳米颗粒自组装而成。结果表明，MoO/MoC@C2 材料表现出优异的 HER 性能，在碱性溶液中仅需 143 mV 的低过电位即可驱动 10 mA·cm 的电流密度，Tafel 斜率仅为 63.4 mV·dec 。值得注意的是，它具有在低过电位下驱动大电流密度的潜在应用，该策略还为制备具有氧化物/碳化物混合相的非贵金属催化剂提供了一种通用途径。
