Electrochemical reduction of CO₂ to higher-order hydrocarbon products offers a significant contribution to the challenge of a circular economy. In the pursuit of better copper metal catalyst, it was early on realized that increasing productivity of copper catalysts systems is reliant on high surface area per volume. Tubular gas diffusion electrodes offer such properties. In this work, we present a methodology to fabricate tubular hollow fibre copper electrodes with drastically increased intrinsic porosity. Our described method utilizes a standard dealloying process of copper aluminium particles to induce an intra-particle nanoporosity. The specific surface area increases from 0.126 m²g^-1 before dealloying to 6.194 m²g^-1 after dealloying. In comparison to conventional planar copper electrodes and literature data from conventional copper hollow fibres, the intra-particle porosity leads to a drastically increase in electrochemical activity. Electrochemical measurements reveal increased current densities at low over-potentials in comparison to conventional copper electrodes under identical experimental conditions emphasizing the significant impact of the porosity on the electrode performance. The presented method can be easily transferred to other alloy particles, highlighting its versatility for electrode fabrication.

用电化学方法将CO ₂还原为高阶烃类产品，对循环经济的挑战做出了重大贡献。为了追求更好的铜金属催化剂，早就意识到提高铜催化剂体系的生产率取决于高的单位体积表面积。管状气体扩散电极提供了这样的特性。在这项工作中，我们提出了一种方法来制造具有大大增加的固有孔隙率的管状中空纤维铜电极。我们描述的方法利用铜铝颗粒的标准脱合金工艺来诱导颗粒内纳米孔隙。比表面积从脱合金前的0.126 m ² g ^-1增加到6.194 m ² g ^-1解除雇用后。与常规的平面铜电极和常规的铜空心纤维的文献数据相比，颗粒内的孔隙率导致电化学活性急剧增加。与传统的铜电极相比，在相同的实验条件下，电化学测量显示出在低过电势下电流密度增加，从而强调了孔隙率对电极性能的重大影响。所提出的方法可以很容易地转移到其他合金颗粒上，突出了其在电极制造中的多功能性。