Yangwei Zhang, Jun Cao, Shixuan Wang, Ying Long, Rongxia Huang, Hua-Tay Lin
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Electrocatalytic activity of α-MoB2 porous self-supported electrodes for the HER: The effects of sintering temperature
α-MoB2, which has been considered as one of the promising nonprecious transition metal borides catalysts for the hydrogen evolution reaction (HER), has recently been reported to be very efficient in the bulk form (self-supported electrode). However, bulk α-MoB2 is normally synthesized under high-temperature and high-pressure conditions. In the present work, α-MoB2 porous self-supported electrodes with relative density of ∼52%–55% were synthesized by a combination of mechano-chemical process and low-temperature (750°C, 800°C, 850°C, and 900°C) spark plasma sintering technique. The effects of the sintering temperature on HER activity of the self-supported electrodes in acidic solution were investigated in this study. The results showed that an overpotential as low as 91.2 mV at a current density of 10 mA/cm2, and a Tafel slope of 61.8 mV/dec were obtained by the α-MoB2 electrode prepared at 850°C. This is the lowest overpotential value of the pure α-MoB2 at a current density of 10 mA/cm2 ever reported in the open literature. Thus, the present study provides a new insight into the potentially innovative approach to manufacture α-MoB2 porous self-supported electrodes with excellent HER performance.
期刊介绍：
The Journal of the American Ceramic Society contains records of original research that provide insight into or describe the science of ceramic and glass materials and composites based on ceramics and glasses. These papers include reports on discovery, characterization, and analysis of new inorganic, non-metallic materials; synthesis methods; phase relationships; processing approaches; microstructure-property relationships; and functionalities. Of great interest are works that support understanding founded on fundamental principles using experimental, theoretical, or computational methods or combinations of those approaches. All the published papers must be of enduring value and relevant to the science of ceramics and glasses or composites based on those materials.
Papers on fundamental ceramic and glass science are welcome including those in the following areas:
Enabling materials for grand challenges[...]
Materials design, selection, synthesis and processing methods[...]
Characterization of compositions, structures, defects, and properties along with new methods [...]
Mechanisms, Theory, Modeling, and Simulation[...]
JACerS accepts submissions of full-length Articles reporting original research, in-depth Feature Articles, Reviews of the state-of-the-art with compelling analysis, and Rapid Communications which are short papers with sufficient novelty or impact to justify swift publication.
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