articleACS CatalysisFeb 19, 2024Closed access

Strong Hydrogen-Bonded Interfacial Water Inhibiting Hydrogen Evolution Kinetics to Promote Electrochemical CO 2 Reduction to C 2+

YWYang WangJZJianrui ZhangJZJianyun ZhaoYWYuantao WeiSCShenghua Chen

Xi'an Jiaotong University

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Abstract

Interfacial water is an important participant in electrochemical CO2 reduction (CO2RR), directly affecting the kinetics of hydrogenation steps occurring in the CO2RR and competitive hydrogen evolution reaction (HER). However, its structural composition and dynamic evolution are difficult to investigate due to bulk water interference and the bias dependence. Herein, we adopt electrochemical in situ vibration spectroscopy combined with molecular dynamics simulations to probe the dynamic change of interfacial water structure on an electrified hydrophobic electrode surface and further explore the mechanism origin of suppressed HER activity and enhanced multicarbon products’ selectivity. We reveal that interfacial…

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Topics & keywords

Topics
Keywords
  • Electrochemistry
  • Dissociation (chemistry)
  • Intermolecular force
  • Hydrogen bond
  • Catalysis
  • Chemistry
  • Faraday efficiency
  • Hydrogen
UN Sustainable Development Goals
  • Clean water and sanitation
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