Ni@CNx阳极催化剂电化学测试和电池测试数据
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展示了完全非贵重氢燃料电池技术的突破性进展,使用 Ni@CNx 阳极和 Co_Mn 阴极实现了 200 mW/cm2 的创纪录功率密度。 2-nmCNx 涂层削弱了 O 结合能,有效减轻了氢氧化反应 (HOR) 极化过程中不希望出现的表面氧化,从而使 Ni@CNx 燃料电池在 200 mA/cm2 下稳定运行 100 小时以上,优于 Ni 纳米粒子对应物。 与 Pt/C 相比,Ni@CNx 对 CO 的耐受性显着增强,因此可以使用含有微量 CO 的氢气,这对实际应用至关重要。 燃料电池中贵金属的完全去除将催化剂成本降低到几乎可以忽略不计的水平,标志着实用碱性燃料电池的一个里程碑。
This work demonstrates a breakthrough in fully non-precious hydrogen fuel cell technology, achieving a record-breaking power density of 200 mW/cm² using a Ni@CNx anode and a Co_Mn cathode. The 2-nm-thick CNx coating weakens the oxygen binding energy, effectively mitigating the undesired surface oxidation during the hydrogen oxidation reaction (HOR) polarization process. As a result, the Ni@CNx fuel cell operates stably for over 100 hours at 200 mA/cm², outperforming its Ni nanoparticle counterpart. Compared to Pt/C, Ni@CNx exhibits significantly enhanced CO tolerance, enabling the use of hydrogen containing trace amounts of CO, which is critical for practical applications. The complete elimination of noble metals in fuel cells reduces catalyst costs to nearly negligible levels, marking a milestone for practical alkaline fuel cells.




