Study on the concentration of catalyst

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< An integrated Re(I) photocatalyst and sensitizer that activates the formation of formic acid from reduction of CO2
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investigation
Molecular process, Photocatalytic CO2 conversion experiments
cat cat conc [µM] PS PS conc [mM] e-D e-D conc [M] H-D H-D conc [M] solvent A solvent B solvent C solv A/B/C additives additives conc [M] feedstock gas feedstock volume intensity pH T [°C] λexc [nm] t [h] TON CO TOF CO Φ CO [%] TON CH4 TOF CH4 Φ CH4 [%] TON H2 TOF H2 Φ H2 [%] TON HCOOH TOF HCOOH Φ HCOOH [%] TON MeOH TOF MeOH Φ MeOH [%] selectivity [%] [CO;CH4;H2;HCOOH;MeOH] Φ all [%] Details include

[Re(bpy)2(CO)2][OTf]

1


TEOA


DMA

TEOA


4:1 405 24 10.3 0.43 1.4 n/a

1.4

Yes

[Re(bpy)2(CO)2][OTf]

1

[Ru(bpy)3][PF6]

1

TEOA


DMA

TEOA


4:1 405 24 1.5 52 2.2 0%; 0%; 2.8%; 97.2%; 0%


Yes

[Re(bpy)2(CO)2][OTf]

0.5

[Ru(bpy)3][PF6]

1

TEOA


DMA

TEOA


4:1 405 24 15 115 4.8 0%; 0%; 11.5%; 88.5%; 0%


Yes

[Re(bpy)2(CO)2][OTf]

0.2

[Ru(bpy)3][PF6]

1

TEOA


DMA

TEOA


4:1 405 24 24 275 11.5 0%; 0%; 8.0%; 92.0%; 0%


Yes

[Re(bpy)2(CO)2][OTf]

0.1

[Ru(bpy)3][PF6]

1

TEOA


DMA

TEOA


4:1 405 24 38 428 17.8 5.8 0%; 0%; 8.2%; 91.8%; 0%

5.8

Yes

[Re(bpy)2(CO)2][OTf]

0.05

[Ru(bpy)3][PF6]

1

TEOA


DMA

TEOA


4:1 405 24 50 535 22.3 0%; 0%; 8.5%; 91.5%; 0%


Yes

[Re(bpy)2(CO)2][OTf]

0.02

[Ru(bpy)3][PF6]

1

TEOA


DMA

TEOA


4:1 405 24 225 1480 61.5 0%; 0%; 13.2%; 86.8%; 0%


Yes

[Re(bpy)2(CO)2][OTf]

0.01

[Ru(bpy)3][PF6]

1

TEOA


DMA

TEOA


4:1 405 24 375 2750 114.6 0%; 0%; 12.0%; 88.0%; 0%


Yes