Abstract Catalyzed thermal decomposition of methane to produce hydrogen was studied. The carbon microfibers with embedded Ni, Cu and Co metals and metal phosphides were introduced as the novel catalysts. The catalysts were prepared by needle-less electrospinning being a versatile method for fibers production in large scale. The efficiency of methane decomposition by utilization of micro fiber carbon supported metal catalysts was studied by the pyrolysis-capillary gas chromatography method. The experiment was carried out in the temperature range from 973.15 to 1073.15 K. Kinetic parameters were calculated based on the Demitcheli kinetic model. It was found that the morphology, schedule of heat treatment and type and content of incorporated transition metals and metal phosphides may be the controlling parameter in the catalytic decomposition of methane. The highest conversion rates about 54% were achieved using carbon microfibers doped with cobalt and cobalt phosphide nanoparticles. The catalyst was heat treated in argon atmosphere followed by the hydrogen reduction. The second highest conversion rates were achieved with carbon microfibers doped with nickel and nickel phosphide nanoparticles carbonized only under argon atmosphere. Graphic Abstract

中文翻译：

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改性碳纤维上的甲烷分解作为制氢的有效催化剂

摘要 研究了甲烷催化热分解制氢。引入了嵌入镍、铜、钴金属和金属磷化物的碳微纤维作为新型催化剂。该催化剂是通过无针静电纺丝制备的，这是一种用于大规模生产纤维的通用方法。采用热解-毛细管气相色谱法研究了利用微纤维碳负载金属催化剂分解甲烷的效率。实验在 973.15 到 1073.15 K 的温度范围内进行。基于 Demitcheli 动力学模型计算动力学参数。发现在形态学上，热处理的时间表以及掺入的过渡金属和金属磷化物的类型和含量可能是甲烷催化分解的控制参数。使用掺杂钴和磷化钴纳米粒子的碳微纤维实现了约 54% 的最高转化率。催化剂在氩气气氛中热处理，然后氢还原。第二高的转化率是用仅在氩气气氛下碳化的镍和磷化镍纳米粒子掺杂的碳微纤维实现的。图形摘要 第二高的转化率是用仅在氩气气氛下碳化的镍和磷化镍纳米粒子掺杂的碳微纤维实现的。图形摘要 第二高的转化率是用仅在氩气气氛下碳化的镍和磷化镍纳米粒子掺杂的碳微纤维实现的。图形摘要