纳米片
过电位
催化作用
氢氧化物
层状双氢氧化物
化学工程
电解质
选择性
铜
化学
一氧化碳
无机化学
材料科学
电化学
纳米技术
冶金
有机化学
电极
物理化学
工程类
作者
Sunglun Kwon,Jie Zhang,Ramesha Ganganahalli,Sumit Verma,Boon Siang Yeo
标识
DOI:10.1002/anie.202217252
摘要
Cu catalysts are most apt for reducing CO(2) to multi-carbon products in aqueous electrolytes. To enhance the product yield, we can increase the overpotential and the catalyst mass loading. However, these approaches can cause inadequate mass transport of CO(2) to the catalytic sites, which will then lead to H2 evolution dominating the product selectivity. Herein, we use a MgAl LDH nanosheet 'house-of-cards' scaffold to disperse CuO-derived Cu (OD-Cu). With this support-catalyst design, at -0.7 VRHE , CO could be reduced to C2+ products with a current density (jC2+ ) of -1251 mA cm-2 . This is 14× that of the jC2+ shown by unsupported OD-Cu. The current densities of C2+ alcohols and C2 H4 were also high at -369 and -816 mA cm-2 respectively. We propose that the porosity of the LDH nanosheet scaffold enhances CO diffusion through the Cu sites. The CO reduction rate can thus be increased, while minimizing H2 evolution, even when high catalyst loadings and large overpotentials are used.
科研通智能强力驱动
Strongly Powered by AbleSci AI