Fig. 4: Mechanism investigation.
From: Isolated Ni atoms enable alkali-free photoreforming of waste polylactic acid plastic
a Calculated band structure of Ni/CdS. b Electronic localization functions of CdS (top) and Ni/CdS (down). c The differential charge density and the corresponding average charge density along the z axis of Ni/CdS. d Calculated adsorption energy of lactic acid on CdS and Ni/CdS. e In situ DRIFTS of PLA photoreforming over Ni/CdS, where red arrow indicates to the hydroxyl on carboxyl and green arrow indicates to the hydroxyl on α-carbon. In situ EPR of PLA photoreforming over f CdS and g Ni/CdS. h Gibbs free energy HER processes over CdS and Ni/CdS. i Calculated energy profiles of different reaction processes for PLA photoreforming over CdS and Ni/CdS. j Reaction scheme of pre-hydrolysis PLA conforming.
