Hierarchically porous Au nanostructures with interconnected channels for efficient mass transport in electrocatalytic CO 2 reduction

• DOI: 10.1073/pnas.1918837117
• Publication Date: 2020-03-05T01:15:42Z
• Authors: Gayea Hyun; Jun Tae Song; Changui Ahn; Youngjin Ham; Donghwi Cho; Jihun Oh; Seokwoo Jeon
• Keywords: Mass transport

Electrocatalytic CO2 reduction is a promising way to provide renewable energy from gaseous The development of nanostructures improves efficiency and selectivity for value-added chemicals, but complex limit the conversion rates due poor mass transport during vigorous electrolysis. Herein, we propose three-dimensional (3D) hierarchically porous Au comprising interconnected macroporous channels (200-300 nm) nanopores (∼10 fabricated via proximity-field nanopatterning. macropores enable efficient large active areas, respectively. roles each pore network are investigated using reliable 3D possessing controlled distribution size. hierarchical nanostructured electrodes show high CO 85.8% at low overpotential 0.264 V activity that maximum 3.96 times higher than dealloyed nanoporous Au. Hence, systematic model study shows proposed have important value in increasing expensive