气凝胶
材料科学
双金属片
格式化
MXenes公司
催化作用
过渡金属
化学工程
纳米技术
原材料
无机化学
金属
冶金
化学
有机化学
工程类
作者
Maryam Abdinejad,Siddhartha Subramanian,Mozhgan Khorasani-Motlagh,Meissam Noroozifar,Salatan Duangdangchote,Ihor Neporozhnii,Davide Ripepi,Donato Pinto,Mengran Li,Kenneth Tang,Joost Middelkoop,Atsushi Urakawa,Oleksandr Voznyy,Heinz‐Bernhard Kraatz,Thomas Burdyny
标识
DOI:10.1002/aenm.202300402
摘要
Abstract The electrochemical CO 2 reduction reaction (CO 2 RR) is an attractive method to produce renewable fuel and chemical feedstock using clean energy sources. Formate production represents one of the most economical target products from CO 2 RR but is primarily produced using post‐transition metal catalysts that require comparatively high overpotentials. Here a composition of bimetallic Cu–Pd is formulated on 2D Ti 3 C 2 T x (MXene) nanosheets that are lyophilized into a highly porous 3D aerogel, resulting in formate production much more efficient than post‐transition metals. Using a membrane electrode assembly (MEA), formate selectivities >90% are achieved with a current density of 150 mA cm −2 resulting in the highest ever reported overall energy efficiency of 47% (cell potentials of −2.8 V), over 5 h of operation. A comparable Cu‐Pd aerogel achieves near‐unity CO production without the MXene templating. This simple strategy represents an important step toward the experimental demonstration of 3D‐MXenes‐based electrocatalysts for CO 2 RR application and opens a new platform for the fabrication of macroscale aerogel MXene‐based electrocatalysts.
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