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<p>Design and development of efficient and inexpensive non-precious metal-based catalysts is a key issue for the hydrolysis of ammonia borane (NH<sub>3</sub>BH<sub>3</sub>, AB). In this study, a Fe<sub>5</sub>Ni<sub>15</sub>Cr<sub>10</sub>Co<sub>10</sub>Mn<sub>60</sub> multi-element alloy catalyst was synthesized by incorporating Ni and Co as active elements and Fe, Cr and Mn as co-catalysts. The effect of heat treatment on the microstructure and catalytic properties of the multi-element alloy was systematically studied. After annealing at 850&#xa0;°C for 2&#xa0;h, the alloy transforms from a single FCC phase to a multi-phase structure composed of FCC phase, Cr-rich <i>σ</i> phase and Mn-rich phase. The corroded alloy ribbon exhibits remarkable catalytic properties, achieving a catalytic rate of 2142.9&#xa0;mL/min/g, which is 1.4 times higher than that of the as-cast alloy. The exceptional properties can be attributed to several factors: (1) the increase in specific surface area and surface concentration of active elements, which are induced by the formation of new phases. (2) the electron enrichment of the Ni and Co elements, which enhances catalytic activity. This study provides robust support for improving the property of catalysts in practical applications.</p>

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The effect of heat treatment on the catalytic properties of Fe5Ni15Cr10Co10Mn60 alloy for NH3BH3 hydrolysis

  • 期刊论文

  • 发表日期：

    2025年8月7日

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  • Yuxuan Chen,
  • Juan Mu,
  • Ying Zhang,
  • Tong Zheng,
  • Zhengwang Zhu,
  • Haifeng Zhang,
  • Yandong Wang

摘要

Design and development of efficient and inexpensive non-precious metal-based catalysts is a key issue for the hydrolysis of ammonia borane (NH3BH3, AB). In this study, a Fe5Ni15Cr10Co10Mn60 multi-element alloy catalyst was synthesized by incorporating Ni and Co as active elements and Fe, Cr and Mn as co-catalysts. The effect of heat treatment on the microstructure and catalytic properties of the multi-element alloy was systematically studied. After annealing at 850 °C for 2 h, the alloy transforms from a single FCC phase to a multi-phase structure composed of FCC phase, Cr-rich σ phase and Mn-rich phase. The corroded alloy ribbon exhibits remarkable catalytic properties, achieving a catalytic rate of 2142.9 mL/min/g, which is 1.4 times higher than that of the as-cast alloy. The exceptional properties can be attributed to several factors: (1) the increase in specific surface area and surface concentration of active elements, which are induced by the formation of new phases. (2) the electron enrichment of the Ni and Co elements, which enhances catalytic activity. This study provides robust support for improving the property of catalysts in practical applications.