WO3/BiVO4 composite photoelectrode prepared by improved auto-combustion method for highly efficient water splitting

Photoelectrochemical Hydrogen Peroxide Production from Water on a WO3/BiVO4 Photoanode and from O2 on an Au Cathode Without External Bias

“…Chemical conversionsu sing light energy have been performed in variousf ields, [1][2][3][4][5][6][7] and significant effortsh ave recently been devotedt oh ydrogen (H 2 )p roduction by water splitting by using inexhaustible solar light for clean energy conversion processes. [1][2][3][4][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22] Photoelectrochemical water splitting systemsa re widely recognizeda sap romising and challenging technology for the productiona nd recovery of H 2 . [1,[8][9][10][11][12][13][14][15][16][17][18][19][20][21][22] In particular,n umerouse fforts have been focused on BiVO 4 photoanodesc apable of utilizing aw ide range of light energy ( % 520 nm) and achieving efficient O 2 generation through water splitting.…”

“…[1][2][3][4][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22] Photoelectrochemical water splitting systemsa re widely recognizeda sap romising and challenging technology for the productiona nd recovery of H 2 . [1,[8][9][10][11][12][13][14][15][16][17][18][19][20][21][22] In particular,n umerouse fforts have been focused on BiVO 4 photoanodesc apable of utilizing aw ide range of light energy ( % 520 nm) and achieving efficient O 2 generation through water splitting. [9][10][11][12][13][14][15] A WO 3 /BiVO 4 photoanode combining BiVO 4 with aW O 3 underlayer,w hich helps to transfer the excited electrons generated on BiVO 4 to the F-doped SnO 2 conductive glass (FTO) substrate, shows an exceptional photoelectrochemical performance for water splitting.…”

“…[1,[8][9][10][11][12][13][14][15][16][17][18][19][20][21][22] In particular,n umerouse fforts have been focused on BiVO 4 photoanodesc apable of utilizing aw ide range of light energy ( % 520 nm) and achieving efficient O 2 generation through water splitting. [9][10][11][12][13][14][15] A WO 3 /BiVO 4 photoanode combining BiVO 4 with aW O 3 underlayer,w hich helps to transfer the excited electrons generated on BiVO 4 to the F-doped SnO 2 conductive glass (FTO) substrate, shows an exceptional photoelectrochemical performance for water splitting. [10][11][12][13] As shown in Equations (1)-(3), almost all water splitting reactions simultaneously produce O 2 on the anode and H 2 on the cathode.…”

“…[9][10][11][12][13][14][15] A WO 3 /BiVO 4 photoanode combining BiVO 4 with aW O 3 underlayer,w hich helps to transfer the excited electrons generated on BiVO 4 to the F-doped SnO 2 conductive glass (FTO) substrate, shows an exceptional photoelectrochemical performance for water splitting. [10][11][12][13] As shown in Equations (1)-(3), almost all water splitting reactions simultaneously produce O 2 on the anode and H 2 on the cathode.…”

Dynamics of Photogenerated Charge Carriers in WO3/BiVO4 Heterojunction Photoanodes

“…[19][20][21] Coupling of BiVO 4 with WO 3 offers an interesting approach to achieve better charge separation and thus improve the overall performance of the photocatalytic system. [22][23][24][25] Type II band alignment in these two semiconductor systems allows electrons from photoexcited BiVO 4 to be transferred into WO 3 and holes getting accumulated at BiVO 4 . The decreased charge carrier recombination in the coupled system ensures better photoelectrochemical properties, similar to the spatial charge separation that occurs in natural photosynthetic systems.…”