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. 2023 Aug 28;62(35):e202304179.
doi: 10.1002/anie.202304179. Epub 2023 Jul 18.

MXene-Regulated Metal-Oxide Interfaces with Modified Intermediate Configurations Realizing Nearly 100% CO2 Electrocatalytic Conversion

Yanan Hao  1 , Feng Hu  1   2 , Shangqian Zhu  3 , Yajie Sun  1 , Hui Wang  1 , Luqi Wang  1 , Ying Wang  1 , Jianjun Xue  1 , Yen-Fa Liao  4 , Minhua Shao  3 , Shengjie Peng  1
Affiliations

MXene-Regulated Metal-Oxide Interfaces with Modified Intermediate Configurations Realizing Nearly 100% CO2 Electrocatalytic Conversion

Yanan Hao et al. Angew Chem Int Ed Engl. .

Abstract

Electrocatalytic CO2 reduction via renewable electricity provides a sustainable way to produce valued chemicals, while it suffers from low activity and selectivity. Herein, we constructed a novel catalyst with unique Ti3 C2 Tx MXene-regulated Ag-ZnO interfaces, undercoordinated surface sites, as well as mesoporous nanostructures. The designed Ag-ZnO/Ti3 C2 Tx catalyst achieves an outstanding CO2 conversion performance of a nearly 100% CO Faraday efficiency with high partial current density of 22.59 mA cm-2 at -0.87 V versus reversible hydrogen electrode. The electronic donation of Ag and up-shifted d-band center relative to Fermi level within MXene-regulated Ag-ZnO interfaces contributes the high selectivity of CO. The CO2 conversion is highly correlated with the dominated linear-bonded CO intermediate confirmed by in situ infrared spectroscopy. This work enlightens the rational design of unique metal-oxide interfaces with the regulation of MXene for high-performance electrocatalysis beyond CO2 reduction.

Keywords: CO2 Electroreduction; Intermediate Configuration; MXene; Metal-Oxide Interface; in Situ ATR-IR Spectroscopy.

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