Fig. 6: Hydrophilic sites for hydrogen evolution.

a Contact angle of PTCDA and PTA with water. b ATR-FTIR spectra of PTA before and after in situ adsorption of D2O. c D2 evolution performance of PTA-split D2O.

a Contact angle of PTCDA and PTA with water. b ATR-FTIR spectra of PTA before and after in situ adsorption of D2O. c D2 evolution performance of PTA-split D2O.