Institute of Catalysis for Energy and Environment, College of Chemistry and Chemical Engineering, Shenyang Normal University, Shenyang 110034, PR China.
Institute of Catalysis for Energy and Environment, College of Chemistry and Chemical Engineering, Shenyang Normal University, Shenyang 110034, PR China.
J Colloid Interface Sci. 2020 Jan 15;558:155-162. doi: 10.1016/j.jcis.2019.09.121. Epub 2019 Sep 30.
A facile solvent-free method was developed to synthesize CoS nanoparticles entrapped, N, S-codoped mesoporous carbon, which involved two steps, including hand milling and carbonation. This synthetic route did not require any solvent during the entire process. Moreover, no water and/or acid solution were needed to remove the impurity from the calcined samples. The final products had mesoporous structures, as well as high Co, N, and S contents. In details, N and S atoms both doped into the carboneous matrix, and the CoS nanoparticles also dispersed well in the composites. The characterization results revealed that the ratios of the precursors and the calcination temperatures both determined the porosities of the final products, which could further affect the electrocatalytic activities. The optional sample, G2.0T1.0Co0.3-900, revealed excellent electrocatalytic activities for hydrogen evolution reaction (HER) under acidic condition, requiring overpotential of 71 mV to afford a current density of 10 mA cm. Additionally, G2.0T1.0Co0.3-900 also showed superior stability and duration.
一种简便的无溶剂方法被开发用来合成 CoS 纳米粒子嵌入的、N，S 共掺杂介孔碳，它涉及两个步骤，包括手研磨和碳化。在整个过程中，这种合成路线不需要任何溶剂。此外，从煅烧样品中去除杂质也不需要水和/或酸溶液。最终产物具有介孔结构，以及高的 Co、N 和 S 含量。具体来说，N 和 S 原子都掺杂到碳基质中，并且 CoS 纳米粒子也很好地分散在复合材料中。表征结果表明，前体的比例和煅烧温度都决定了最终产物的孔隙率，这可以进一步影响电催化活性。可选样品 G2.0T1.0Co0.3-900 在酸性条件下对析氢反应（HER）表现出优异的电催化活性，需要 71 mV 的过电势才能提供 10 mA cm 的电流密度。此外，G2.0T1.0Co0.3-900 还表现出优异的稳定性和耐久性。
