碳包镍催化剂的电化学性能测试和单电池测试数据

完全不含贵金属的碱性聚合物电解质燃料电池 (APEFC) 因缺乏活性非贵金属氢氧化反应 (HOR) 催化剂而受到阻碍。 到目前为止，很少有研究关注非贵金属 HOR 催化剂的 APEFC 性能。 在此，通过简单地调节煅烧过程中的 H2/Ar 比率，我们合成了一种镍核碳壳 (Ni@C) 催化剂，其电化学表面积 (ECSA) 归一化交换电流密度为 0.090 mA cm2， 在报道的镍基 HOR 催化剂中最高。 更重要的是，采用优化催化剂 Ni-1% H2/Ar 作为阳极催化剂的 APEFC 实现了 670 mW cm2(H2–O2) 和 546 mW cm2(H2-Air CO2-free) 的峰值功率密度 ), 高于采用镍基 HOR 催化剂的最先进的 APEFC，并且可以在 200 mA cm2 下稳定工作 100 h 2.表征结果表明，H2 能够影响粒径并蚀刻 合成过程中催化剂的碳壳，可以提高表观 HOR 催化活性。 进一步的实验表明，在合成过程中适当的 H2 浓度可以降低氢结合能 (HBE)，从而提高 Ni-1% H2/Ar 的固有 HOR 催化活性。Alkaline polymer electrolyte fuel cells (APEFCs) that are completely free of noble metals are hindered by the lack of active non-noble metal hydrogen oxidation reaction (HOR) catalysts. To date, very few studies have focused on the APEFC performance of non-noble metal HOR catalysts. Herein, we synthesized a nickel-core carbon-shell (Ni@C) catalyst by simply adjusting the H2/Ar ratio during the calcination process. The ECSA-normalized exchange current density of this catalyst reaches 0.090 mA cm⁻², which is the highest among all reported Ni-based HOR catalysts. More importantly, the APEFC using the optimized catalyst Ni-1% H2/Ar as the anode catalyst achieved peak power densities of 670 mW cm⁻² (H2–O2) and 546 mW cm⁻² (H2-Air CO2-free), which outperforms the state-of-the-art APEFCs employing Ni-based HOR catalysts, and can operate stably for 100 hours at 200 mA cm⁻². Characterization results reveal that H2 can affect the particle size and etch the carbon shell of the catalyst during synthesis, thereby enhancing the apparent HOR catalytic activity. Further experiments demonstrate that an appropriate H2 concentration during synthesis can reduce the hydrogen binding energy (HBE), thus improving the intrinsic HOR catalytic activity of Ni-1% H2/Ar.

搜集汇总

背景与挑战

背景概述

该数据集聚焦于镍核碳壳（Ni@C）催化剂，通过优化H2/Ar比率合成，用于提升碱性聚合物电解质燃料电池的氢氧化反应活性。数据集包含电化学性能测试和单电池测试数据，展示了催化剂的高交换电流密度、峰值功率密度及在200 mA cm²下稳定工作100小时的性能。