Observation on Microenvironment Changes of Dynamic Catalysts in Acidic CO 2 Reduction

Electrochemical CO2 reduction reaction (CO2RR) in acid can solve alkalinity issues while highly corrosive and reductive acidic electrolytes usually cause catalyst degradation. Inhibiting catalyst degradation is crucial for the stability of acidic CO2RR. Here, we reveal the microenvironment changes of dynamic Bi-based catalysts and develop a pulse chronoamperometry (CA) strategy to improve the stability of acidic CO2RR. In situ fluorescence mappings show that the local pH changes from neutral to acid, and the in situ Raman spectra reveal the dynamic evolution of interfacial water structures in the microenvironment. We propose that the surface charge properties of dynamic catalysts affect the competitive…

• NN
  National Natural Science Foundation of China

  Awards: 52188101, 52303375
• SF
  Shenzhen Fundamental Research Program

  Award: WDZC20220812141108001
• GP
  Guangdong Province Introduction of Innovative R&D Team

  Award: 2017ZT07C341
• NS
  National Science Fund for Distinguished Young Scholars

  Award: 52125309
• BA
  Basic and Applied Basic Research Foundation of Guangdong Province

  Awards: 2021A1515110829, 2022B1515120004