It is widely recognized that metal-based catalytic materials having a porous structure provides a great potential for electrochemical CO₂ reduction. In this study, we prepared coral-like porous Ag (CP-Ag) using the electrodeposition approach at various deposition potentials at -0.9 (CP-Ag-0.9), -1.3 (CP-Ag-1.3), and -1.7 V (CP-Ag-1.7), respectively. Among them, CP-Ag-1.3 was revealed to possess the most enhanced CDRR activity and selectivity. The CO partial current density and the faradaic efficiency of CP-Ag-1.3 was 5.3 mA cm⁻² and 96.38 %, respectively, which is a substantially high performance surpassingly compared to even the polycrystalline Au known as the most active materials for CO₂ reduction. The distinctive CO₂ reduction performance of CP-Ag-1.3 resulted from a large surface area, high index facets of the curved surfaces, and an extremely decreased charge transfer resistance. In addition, CP-Ag-1.3 showed an excellent durability without any morphology change in constant current application test for 24 h. The prepared catalysts are capable of enhancing the performance of Ag-based catalysts for the practical application by preparing with cost-effective material.

众所周知，具有多孔结构的金属基催化材料为电化学还原CO ₂提供了很大的潜力。在这项研究中，我们使用电沉积方法在-0.9（CP-Ag-0.9），-1.3（CP-Ag-1.3）和-1.7 V（-）的各种沉积电位下制备了珊瑚状多孔Ag（CP-Ag）。 CP-Ag-1.7）。其中，CP-Ag-1.3被证明具有最大的CDRR活性和选择性。CP-Ag-1.3的CO分电流密度和法拉第效率分别为5.3 mA cm ^-2和96.38％，与甚至被称为最具活性的CO ₂还原材料的多晶Au相比，这也是非常高的性能。独特的CO ₂CP-Ag-1.3的降低性能归因于较大的表面积，弯曲表面的高折射率小面以及极大降低的电荷转移阻力。此外，CP-Ag-1.3在恒流应用测试中24小时内显示出优异的耐久性，而其形态没有任何变化。通过用成本有效的材料制备，所制备的催化剂能够增强用于实际应用的Ag基催化剂的性能。