Metal–organic framework-derived indium–copper bimetallic oxide catalysts for selective aqueous electroreduction of CO₂

Abstract

MOF-derived In–Cu bimetallic oxides are highly efficient electrocatalysts for the transformation of CO2 into CO in an aqueous electrolyte.

Bimetallic metal–organic frameworks and their derivatives

“…and 1.23 V with a small voltage gap of 0.66 V. Moreover, no obvious voltage gap change was observed for 500 h, indicating the high stability of FeNiP/NCH.Electrochemical CO 2 reduction is a potentially effective approach to produce synthetic fuels utilizing waste CO 2 331. Bimetallic MOF-derived nanomaterials demonstrated impressive FE for CO 2 reduction 238,240,332,333. Pan, Liu, Jiang and coworkers employed single-atom Ni implanted N doped carbon catalysts (Ni SA -N x -C) with a controlled N coordination number (x ¼ 2, 3, 4) derived from a MgNi-MOF-74 conned polypyrrole (PPy) composite for the electrochemical reduction of CO 2 to CO 240.…”

“…Ni SA -N 2 -C possessed the highest CO 2 reduction activity among the Ni SA -N x -C catalysts, attributed to the favorable formation of the COOH* intermediate on low coordinated Ni-N 2 sites. Sun, Han and co-workers applied MOF-derived In-Cu bimetallic oxide catalysts (InCuO-x, where x is the Cu/In molar ratio) for CO 2 electroreduction 332. InCuO-0.92 showed a highest FE of 92.1% at a potential of À0.8 V, which was 1.1, 1.3, 1.7, and 3.0 times higher than that of InCuO-0.72, InCuO-0.55, InCuO-0.37, and InCuO-0.15, respectively.…”

Synthesis of C<sub>2</sub> products via electrocatalytic CO<sub>2</sub> reduction

“…In(III)盐为原料, 制备出枝状的Cu-In双金属催化剂, 发 现通过调节Cu/In比可以调节产物中CO/H 2 的比值. Han 课题组 [102] 以含Cu/In的金属有机框架材料为前驱体, 经 锻烧、电还原制备出Cu-In氧化物颗粒. 研究者同样发 现通过调节Cu/In比, 可以调节产物中CO/H 2 的比值, CO的法拉第效率最高可达92.1%.…”

Engineering Metal–Organic Frameworks for the Electrochemical Reduction of CO2: A Minireview

“…Very recently, Guo et al. introduced a new method to tune the selectivity of the CO 2 ER by using a MOF‐derived bimetallic oxide catalyst . Thus, MOF‐derived In‐Cu bimetallic oxides were synthesized through the pyrolysis of an In‐Cu bimetallic MOF.…”