Photocatalytic CO2 reduction under varied conditions

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< Nickel(II) pincer complexes demonstrate that the remote substituent controls catalytic carbon dioxide reduction
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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

Ni(4O(-)py)-(MeNHC)2Cl

0.1

Ir(ppy)3

0.1

BIH

0.011


MeCN



TEA solar spectrum 10.6 n/a


Yes

[Ni(py)-(MeNHC)2(MeCN)][PF6]2

0.1

Ir(ppy)3

0.1

BIH

0.011


MeCN



TEA solar spectrum 0.1 n/a


Yes

Ni(4O(-)py)-(MeNHC)2Cl

0.1

Ir(ppy)3

0.1

BIH

0.011


DMF



TEA solar spectrum 9 n/a


Yes

[Ni(py)-(MeNHC)2(MeCN)][PF6]2

0.1

Ir(ppy)3

0.1

BIH

0.011


DMF



TEA solar spectrum 0.5 n/a


Yes

Ni(4O(-)py)-(MeNHC)2Cl

0.1

Ir(ppy)3

0.1

BIH

0.011


MeCN



solar spectrum 1.8 n/a


Yes

Ni(4O(-)py)-(MeNHC)2Cl

0.1

Ir(ppy)3

0.1

BIH

0.011


MeCN



proton sponge solar spectrum 5.6 n/a


Yes

Ni(4O(-)py)-(MeNHC)2Cl

0.1

Ir(ppy)3

0.1

BIH

0.011


MeCN



TfOH solar spectrum 0.9 n/a


Yes

Ni(4O(-)py)-(MeNHC)2Cl

0.1


BIH

0.011


MeCN



TEA solar spectrum 0.6 n/a


Yes

Ni(4O(-)py)-(MeNHC)2Cl

0.1

Ir(ppy)3

0.1



MeCN



TEA solar spectrum 0.3 n/a


Yes

Ni(4O(-)py)-(MeNHC)2Cl

0.1

Ir(ppy)3

0.1

BIH

0.011


MeCN



N2 solar spectrum 0.2 n/a


Yes