Scale-up fabrication of electrodes using a facile method is a challenge for the commercialization of direct formic acid fuel cells (DFAFCs). Herein, we report the facile fabrication of a Pt-decorated Au dendrite (Pt@Au-D) anode for DFAFCs. The Au dendrite was prepared by the galvanic displacement of Au on Ni-deposited carbon paper (CP) with a geometrical area of 10.2 cm. The Pt islands were then electrodeposited on the Au dendrite with an extremely low Pt loading of 9.6 ± 0.1 μg/cm. The Pt@Au-D/CP showed a current density of 27.1 mA/cm at 0.5 V in an electrolyte consisting of 0.5 M HCOOH +0.5 M HSO, which was higher than those of state-of-art Pt–Au catalysts. Pt@Au-D/CP was employed as the anode for a DFAFC single cell coupled with a commercial Pt/C/CP cathode. The DFAFC single cell demonstrated a current density of 67.6 mA/cm at 0.4 V and a maximum power density of 65.2 mW/cm. Compared with state-of-the-art Pt–Au anodes, the Pt@Au-D/CP anode exhibited superior mass activity.

中文翻译：

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电化学合成 Pt 修饰的金枝晶阳极用于构建直接甲酸燃料电池


使用简便方法放大电极的制造是直接甲酸燃料电池（DFAFC）商业化的一个挑战。在此，我们报告了用于 DFAFC 的 Pt 装饰金枝晶 (Pt@Au-D) 阳极的简便制造。通过在几何面积为 10.2 cm 的镍沉积碳纸 (CP) 上电位移金来制备金枝晶。然后将铂岛电沉积在金枝晶上，铂负载量极低，为 9.6 ± 0.1 μg/cm。 Pt@Au-D/CP 在由 0.5 M HCOOH + 0.5 M HSO 组成的电解质中在 0.5 V 电压下表现出 27.1 mA/cm 的电流密度，高于最先进的 Pt-Au 催化剂。 Pt@Au-D/CP 被用作 DFAFC 单电池的阳极，与商业 Pt/C/CP 阴极耦合。 DFAFC 单电池在 0.4 V 电压下的电流密度为 67.6 mA/cm2，最大功率密度为 65.2 mW/cm2。与最先进的 Pt-Au 阳极相比，Pt@Au-D/CP 阳极表现出优异的质量活性。