Ultrastable Cu Catalyst for CO2 Electroreduction to Multicarbon Liquid Fuels by Tuning C–C Coupling with CuTi Subsurface
Authors:
- 1 October 2021
- journal article
- research article
- Published by Wiley in Angewandte Chemie International Edition
- Vol. 60 (50) , 26122-26127
Abstract
Production of multicarbon (C2+) liquid fuels is a challenging task for electrocatalytic CO2 reduction, mainly limited by the stabilization of reaction intermediates and their subsequent C−C couplings. In this work, we report a unique catalyst, the coordinatively unsaturated Cu sites on amorphous CuTi alloy (a‐CuTi@Cu) toward electrocatalytic CO2 reduction to multicarbon (C2‐4) liquid fuels. Remarkably, the electrocatalyst yields ethanol, acetone, and n‐butanol as major products with a total C2‐4 faradaic efficiency of about 49 % at −0.8 V vs. reversible hydrogen electrode (RHE), which can be maintained for at least 3 months. Theoretical simulations and in situ characterization reveals that subsurface Ti atoms can increase the electron density of surface Cu sites and enhance the adsorption of *CO intermediate, which in turn reduces the energy barriers required for *CO dimerization and trimerization.Keywords
Funding Information
- National Natural Science Foundation of China (21725102)
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