Editing Photocatalytic Reduction of CO2 by Highly Efficient Homogeneous FeII Catalyst based on 2,6-Bis(1’,2’,3’-triazolyl-methyl)pyridine. Comparison with Analogues.

{{DOI|doi=10.1002/cctc.202201163}}
[[Category:Photocatalytic CO2 conversion to CO]][[Category:Publication]]
{{BaseTemplate}}
===Abstract===
====Summary====
A photochemical reduction of CO<sub>2</sub> to CO was shown using the iron complex {{#moleculelink:|link=ZCGUPOIZKSBSCM-UHFFFAOYSA-N|image=false|width=300|height=200}} as catalyst in combination with the copper photosensitizer {{#moleculelink:|link=SVWABAAUBHILMW-UHFFFAOYSA-P|image=false|width=300|height=200}}. Turnover numbers (TONs) of 576 and a selectivity of 67% for CO were reached in MeCN/TEOA. The experiments were conducted under visible-light irradiation (λ = 420 nm) using BIH as sacrificial electron donor (see section SEDs below). The homoleptic iron complex {{#moleculelink:|link=SIMPDUKIPFZEDX-UHFFFAOYSA-N|image=false|width=300|height=200}} and the cobalt complexes {{#moleculelink:|link=JDMNOCVBLMVSON-UHFFFAOYSA-N|image=false|width=300|height=200}} and {{#moleculelink:|link=QMZVNZOKJUBNLZ-UHFFFAOYSA-N|image=false|width=300|height=200}} were tested for CO<sub>2</sub> reduction as well, but did not show substantial conversion of CO<sub>2</sub> to CO. 
====Advances and special progress====
The authors reported a iron complex with one of the highest activities for CO<sub>2</sub> reduction among earth-abundant systems with monometallic iron catalysts.

====Additional remarks====
In addition to the production of CO, a substantial amount of H<sub>2</sub> (TON of 287) was formed in the reduction process with complex {{#moleculelink:|link=ZCGUPOIZKSBSCM-UHFFFAOYSA-N|image=false|width=300|height=200}}. 

===Content of the published article in detail===
The article contains results for the reduction of CO<sub>2</sub> to CO under visible-light catalysis using the iron complex {{#moleculelink:|link=ZCGUPOIZKSBSCM-UHFFFAOYSA-N|image=false|width=300|height=200}} as a catalyst. The catalytic system performs best (referring to the TON of CO production) in MeCN/TEOA.
====Catalyst====
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  -INDIGO-05142413582D

  0  0  0  0  0  0  0  0  0  0  0 V3000
M  V30 BEGIN CTAB
M  V30 COUNTS 43 50 0 0 0
M  V30 BEGIN ATOM
M  V30 1 C 7.33485 -6.22507 0.0 0
M  V30 2 C 9.06515 -6.22459 0.0 0
M  V30 3 N 8.20164 -5.72497 0.0 0
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M  V30 10 C 5.27652 -4.40064 0.0 0
M  V30 11 C 5.32883 -3.40199 0.0 0
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M  V30 13 N 6.83937 -3.98188 0.0 0
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M  V30 15 C 2.8799 -2.32643 0.0 0
M  V30 16 C 3.58516 -3.03205 0.0 0
M  V30 17 C 3.13832 -1.35942 0.0 0
M  V30 18 C 4.81112 -1.8018 0.0 0
M  V30 19 C 4.09941 -1.09923 0.0 0
M  V30 20 N 10.2814 -4.78397 0.0 0
M  V30 21 N 9.8747 -3.87043 0.0 0
M  V30 22 N 10.6178 -3.20126 0.0 0
M  V30 23 C 11.4839 -3.70125 0.0 0
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M  V30 25 C 12.3974 -3.29453 0.0 0
M  V30 26 C 13.2611 -1.79522 0.0 0
M  V30 27 C 12.397 -2.29382 0.0 0
M  V30 28 C 14.1283 -2.29511 0.0 0
M  V30 29 C 13.2681 -3.79642 0.0 0
M  V30 30 C 14.1309 -3.2908 0.0 0
M  V30 31 Fe 8.2 -4.325 0.0 0
M  V30 32 C 7.40985 -0.800074 0.0 0
M  V30 33 C 9.14015 -0.799589 0.0 0
M  V30 34 C 8.27664 -0.299967 0.0 0
M  V30 35 C 9.14015 -1.80053 0.0 0
M  V30 36 C 7.40985 -1.80502 0.0 0
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M  V30 END ATOM
M  V30 BEGIN BOND
M  V30 1 2 3 1
M  V30 2 2 4 2
M  V30 3 1 1 5
M  V30 4 1 2 3
M  V30 5 2 5 6
M  V30 6 1 6 4
M  V30 7 1 1 7
M  V30 8 1 2 8
M  V30 9 1 7 9
M  V30 10 1 9 10
M  V30 11 2 10 11
M  V30 12 1 11 12
M  V30 13 2 12 13
M  V30 14 1 13 9
M  V30 15 1 11 14
M  V30 16 2 16 14
M  V30 17 2 17 15
M  V30 18 1 14 18
M  V30 19 1 15 16
M  V30 20 2 18 19
M  V30 21 1 19 17
M  V30 22 1 8 20
M  V30 23 1 20 21
M  V30 24 2 21 22
M  V30 25 1 22 23
M  V30 26 2 23 24
M  V30 27 1 24 20
M  V30 28 1 23 25
M  V30 29 2 27 25
M  V30 30 2 28 26
M  V30 31 1 25 29
M  V30 32 1 26 27
M  V30 33 2 29 30
M  V30 34 1 30 28
M  V30 35 8 13 31
M  V30 36 8 31 21
M  V30 37 8 31 3
M  V30 38 2 34 32
M  V30 39 2 35 33
M  V30 40 1 32 36
M  V30 41 1 33 34
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M  V30 43 1 37 35
M  V30 44 8 31 37
M  V30 45 2 39 40
M  V30 46 2 38 39
M  V30 47 1 38 31
M  V30 48 2 42 43
M  V30 49 2 41 42
M  V30 50 1 41 31
M  V30 END BOND
M  V30 END CTAB
M  END
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  -INDIGO-05142414142D

  0  0  0  0  0  0  0  0  0  0  0 V3000
M  V30 BEGIN CTAB
M  V30 COUNTS 61 74 0 0 0
M  V30 BEGIN ATOM
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M  V30 23 C 14.1006 -3.83969 0.0 0
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M  V30 43 C 4.59537 -7.85715 0.0 0
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M  V30 48 C 12.353 -7.84993 0.0 0
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M  V30 55 C 3.34693 -6.73021 0.0 0
M  V30 56 C 2.37928 -6.47761 0.0 0
M  V30 57 C 14.563 -6.46884 0.0 0
M  V30 58 C 13.5993 -6.7268 0.0 0
M  V30 59 C 15.2712 -7.17614 0.0 0
M  V30 60 C 14.0517 -8.40364 0.0 0
M  V30 61 C 15.016 -8.13856 0.0 0
M  V30 END ATOM
M  V30 BEGIN BOND
M  V30 1 2 4 2
M  V30 2 2 5 3
M  V30 3 1 2 6
M  V30 4 1 3 4
M  V30 5 2 6 7
M  V30 6 1 7 5
M  V30 7 1 3 8
M  V30 8 1 7 9
M  V30 9 1 8 10
M  V30 10 1 9 11
M  V30 11 1 10 12
M  V30 12 2 12 13
M  V30 13 1 13 14
M  V30 14 2 14 15
M  V30 15 1 15 10
M  V30 16 1 11 16
M  V30 17 2 16 17
M  V30 18 1 17 18
M  V30 19 2 18 19
M  V30 20 1 19 11
M  V30 21 1 18 20
M  V30 22 1 13 21
M  V30 23 2 23 21
M  V30 24 2 24 22
M  V30 25 1 21 25
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M  V30 27 2 25 26
M  V30 28 1 26 24
M  V30 29 2 28 20
M  V30 30 2 29 27
M  V30 31 1 20 30
M  V30 32 1 27 28
M  V30 33 2 30 31
M  V30 34 1 31 29
M  V30 35 2 34 32
M  V30 36 2 35 33
M  V30 37 1 32 36
M  V30 38 1 33 34
M  V30 39 2 36 37
M  V30 40 1 37 35
M  V30 41 1 33 38
M  V30 42 1 37 39
M  V30 43 1 38 40
M  V30 44 1 39 41
M  V30 45 1 40 42
M  V30 46 2 42 43
M  V30 47 1 43 44
M  V30 48 2 44 45
M  V30 49 1 45 40
M  V30 50 1 41 46
M  V30 51 2 46 47
M  V30 52 1 47 48
M  V30 53 2 48 49
M  V30 54 1 49 41
M  V30 55 1 48 50
M  V30 56 1 43 51
M  V30 57 2 53 51
M  V30 58 2 54 52
M  V30 59 1 51 55
M  V30 60 1 52 53
M  V30 61 2 55 56
M  V30 62 1 56 54
M  V30 63 2 58 50
M  V30 64 2 59 57
M  V30 65 1 50 60
M  V30 66 1 57 58
M  V30 67 2 60 61
M  V30 68 1 61 59
M  V30 69 8 5 1
M  V30 70 8 45 1
M  V30 71 8 16 1
M  V30 72 8 35 1
M  V30 73 8 1 46
M  V30 74 8 1 15
M  V30 END BOND
M  V30 END CTAB
M  END
</chemform><chemform smiles="C12CN3N(~[Co]4(~N=1C(CN1C=C(C5C=CC=CC=5)N=N1~4)=CC=C2)(~N1C=CC=CC=1)(~N=C=S)~N=C=S)=NC(C1C=CC=CC=1)=C3" inchi="1S/C23H19N7.C5H5N.2CNS.Co/c1-3-8-18(9-4-1)22-16-29(27-25-22)14-20-12-7-13-21(24-20)15-30-17-23(26-28-30)19-10-5-2-6-11-19;1-2-4-6-5-3-1;2*2-1-3;/h1-13,16-17H,14-15H2;1-5H;;;/q;;2*-1;+2" inchikey="JDMNOCVBLMVSON-UHFFFAOYSA-N" height="200px" width="300px" float="none">
  -INDIGO-05142414182D

  0  0  0  0  0  0  0  0  0  0  0 V3000
M  V30 BEGIN CTAB
M  V30 COUNTS 43 50 0 0 0
M  V30 BEGIN ATOM
M  V30 1 C 6.98485 -5.27507 0.0 0
M  V30 2 C 8.71515 -5.27459 0.0 0
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M  V30 31 Co 7.975 -3.15 0.0 0
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M  V30 33 C 8.89015 -0.149589 0.0 0
M  V30 34 C 8.02664 0.350033 0.0 0
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M  V30 END ATOM
M  V30 BEGIN BOND
M  V30 1 2 3 1
M  V30 2 2 4 2
M  V30 3 1 1 5
M  V30 4 1 2 3
M  V30 5 2 5 6
M  V30 6 1 6 4
M  V30 7 1 1 7
M  V30 8 1 2 8
M  V30 9 1 7 9
M  V30 10 1 8 10
M  V30 11 1 9 11
M  V30 12 2 11 12
M  V30 13 1 12 13
M  V30 14 2 13 14
M  V30 15 1 14 9
M  V30 16 1 10 15
M  V30 17 2 15 16
M  V30 18 1 16 17
M  V30 19 2 17 18
M  V30 20 1 18 10
M  V30 21 1 12 19
M  V30 22 1 17 20
M  V30 23 2 22 20
M  V30 24 2 23 21
M  V30 25 1 20 24
M  V30 26 1 21 22
M  V30 27 2 24 25
M  V30 28 1 25 23
M  V30 29 2 27 19
M  V30 30 2 28 26
M  V30 31 1 19 29
M  V30 32 1 26 27
M  V30 33 2 29 30
M  V30 34 1 30 28
M  V30 35 2 34 32
M  V30 36 2 35 33
M  V30 37 1 32 36
M  V30 38 1 33 34
M  V30 39 2 36 37
M  V30 40 1 37 35
M  V30 41 2 38 39
M  V30 42 2 39 40
M  V30 43 8 38 31
M  V30 44 2 41 42
M  V30 45 2 42 43
M  V30 46 8 43 31
M  V30 47 8 14 31
M  V30 48 8 37 31
M  V30 49 8 31 15
M  V30 50 8 31 3
M  V30 END BOND
M  V30 END CTAB
M  END
</chemform><chemform smiles="[Co]12(~N3C(CN4C=C(C5C=CC=CC=5)N=N4~1)=CC=CC=3CN1N~2=NC(C2C=CC=CC=2)=C1)12~N3N(C=C(C4C=CC=CC=4)N=3)CC3C=CC=C(CN4C=C(C5C=CC=CC=5)N=N4~1)N=3~2" inchi="1S/2C23H19N7.Co/c2*1-3-8-18(9-4-1)22-16-29(27-25-22)14-20-12-7-13-21(24-20)15-30-17-23(26-28-30)19-10-5-2-6-11-19;/h2*1-13,16-17H,14-15H2;" inchikey="QMZVNZOKJUBNLZ-UHFFFAOYSA-N" height="200px" width="300px" float="none">
  -INDIGO-05142414222D

  0  0  0  0  0  0  0  0  0  0  0 V3000
M  V30 BEGIN CTAB
M  V30 COUNTS 61 74 0 0 0
M  V30 BEGIN ATOM
M  V30 1 Co 10.25 -5.675 0.0 0
M  V30 2 C 9.38485 -10.4751 0.0 0
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M  V30 4 N 10.2266 -9.97497 0.0 0
M  V30 5 C 11.0902 -11.4755 0.0 0
M  V30 6 C 9.35985 -11.48 0.0 0
M  V30 7 C 10.2288 -11.975 0.0 0
M  V30 8 C 8.5689 -9.97495 0.0 0
M  V30 9 C 11.9564 -9.97499 0.0 0
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M  V30 12 C 6.99939 -9.00438 0.0 0
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M  V30 26 C 16.3059 -7.6158 0.0 0
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M  V30 30 C 5.87722 -6.61454 0.0 0
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M  V30 32 C 11.0393 -1.09963 0.0 0
M  V30 33 C 9.30905 -1.10011 0.0 0
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M  V30 35 C 9.30905 -0.0991716 0.0 0
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M  V30 37 C 10.1704 0.400329 0.0 0
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M  V30 42 C 13.3998 -2.57033 0.0 0
M  V30 43 C 13.6077 -3.54849 0.0 0
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M  V30 47 N 7.60636 -4.04844 0.0 0
M  V30 48 C 6.74034 -3.54845 0.0 0
M  V30 49 C 6.94829 -2.57029 0.0 0
M  V30 50 C 5.82679 -3.95517 0.0 0
M  V30 51 C 14.5213 -3.95522 0.0 0
M  V30 52 C 5.82717 -4.95589 0.0 0
M  V30 53 C 4.09589 -4.95459 0.0 0
M  V30 54 C 4.95614 -3.45328 0.0 0
M  V30 55 C 16.2516 -3.95357 0.0 0
M  V30 56 C 15.3878 -3.45453 0.0 0
M  V30 57 C 16.2523 -4.95451 0.0 0
M  V30 58 C 14.522 -4.96016 0.0 0
M  V30 59 C 15.3913 -5.45459 0.0 0
M  V30 60 C 4.96306 -5.45448 0.0 0
M  V30 61 C 4.0933 -3.95891 0.0 0
M  V30 END ATOM
M  V30 BEGIN BOND
M  V30 1 2 4 2
M  V30 2 2 5 3
M  V30 3 1 2 6
M  V30 4 1 3 4
M  V30 5 2 6 7
M  V30 6 1 7 5
M  V30 7 1 2 8
M  V30 8 1 3 9
M  V30 9 1 8 10
M  V30 10 1 9 11
M  V30 11 1 10 12
M  V30 12 2 12 13
M  V30 13 1 13 14
M  V30 14 2 14 15
M  V30 15 1 15 10
M  V30 16 1 11 16
M  V30 17 2 16 17
M  V30 18 1 17 18
M  V30 19 2 18 19
M  V30 20 1 19 11
M  V30 21 1 18 20
M  V30 22 1 13 21
M  V30 23 2 23 20
M  V30 24 2 24 22
M  V30 25 1 20 25
M  V30 26 1 22 23
M  V30 27 2 25 26
M  V30 28 1 26 24
M  V30 29 2 28 21
M  V30 30 2 29 27
M  V30 31 1 21 30
M  V30 32 1 27 28
M  V30 33 2 30 31
M  V30 34 1 31 29
M  V30 35 2 34 32
M  V30 36 2 35 33
M  V30 37 1 32 36
M  V30 38 1 33 34
M  V30 39 2 36 37
M  V30 40 1 37 35
M  V30 41 1 32 38
M  V30 42 1 33 39
M  V30 43 1 38 40
M  V30 44 1 39 41
M  V30 45 1 40 42
M  V30 46 2 42 43
M  V30 47 1 43 44
M  V30 48 2 44 45
M  V30 49 1 45 40
M  V30 50 1 41 46
M  V30 51 2 46 47
M  V30 52 1 47 48
M  V30 53 2 48 49
M  V30 54 1 49 41
M  V30 55 1 48 50
M  V30 56 1 43 51
M  V30 57 2 52 50
M  V30 58 1 50 54
M  V30 59 2 56 51
M  V30 60 2 57 55
M  V30 61 1 51 58
M  V30 62 1 55 56
M  V30 63 2 58 59
M  V30 64 1 59 57
M  V30 65 1 60 52
M  V30 66 2 53 60
M  V30 67 2 54 61
M  V30 68 1 61 53
M  V30 69 8 34 1
M  V30 70 8 46 1
M  V30 71 8 1 45
M  V30 72 8 15 1
M  V30 73 8 1 16
M  V30 74 8 1 4
M  V30 END BOND
M  V30 END CTAB
M  END
</chemform>

====Photosensitizer====
<chemform smiles="CC1C=CC2C3=C4C(=CC=2)C=CC(C)=N4~[Cu]2(~P(C4C=CC=CC=4)(C4C=CC=CC=4)C4=CC=CC=C4OC4C=CC=CC=4P~2(C2C=CC=CC=2)C2C=CC=CC=2)~N=13" inchi="1S/C36H28OP2.C14H12N2.Cu/c1-5-17-29(18-6-1)38(30-19-7-2-8-20-30)35-27-15-13-25-33(35)37-34-26-14-16-28-36(34)39(31-21-9-3-10-22-31)32-23-11-4-12-24-32;1-9-3-5-11-7-8-12-6-4-10(2)16-14(12)13(11)15-9;/h1-28H;3-8H,1-2H3;/q;;-2/p+2" inchikey="SVWABAAUBHILMW-UHFFFAOYSA-P" height="200px" width="300px" float="none">
  -INDIGO-05142413492D

  0  0  0  0  0  0  0  0  0  0  0 V3000
M  V30 BEGIN CTAB
M  V30 COUNTS 56 66 0 0 0
M  V30 BEGIN ATOM
M  V30 1 C 12.15 -4.31795 0.0 0
M  V30 2 C 11.65 -5.18397 0.0 0
M  V30 3 N 10.65 -5.18397 0.0 0
M  V30 4 C 10.15 -6.05 0.0 0
M  V30 5 C 9.15 -6.05 0.0 0
M  V30 6 N 8.65 -5.18397 0.0 0
M  V30 7 C 7.65 -5.18397 0.0 0
M  V30 8 C 7.15 -4.31795 0.0 0
M  V30 9 C 7.15 -6.05 0.0 0
M  V30 10 C 7.65 -6.91603 0.0 0
M  V30 11 C 8.65 -6.91603 0.0 0
M  V30 12 C 9.15 -7.78205 0.0 0
M  V30 13 C 10.15 -7.78205 0.0 0
M  V30 14 C 10.65 -6.91603 0.0 0
M  V30 15 C 11.65 -6.91603 0.0 0
M  V30 16 C 12.15 -6.05 0.0 0
M  V30 17 Cu 9.575 -4.05 0.0 0
M  V30 18 C 7.81136 1.15012 0.0 0
M  V30 19 C 8.67693 -0.348124 0.0 0
M  V30 20 C 8.67786 0.649512 0.0 0
M  V30 21 C 7.81008 -0.848595 0.0 0
M  V30 22 C 6.94105 0.647646 0.0 0
M  V30 23 C 6.94684 -0.352412 0.0 0
M  V30 24 O 9.54272 -0.848527 0.0 0
M  V30 25 C 10.409 -0.34893 0.0 0
M  V30 26 C 11.2727 1.15038 0.0 0
M  V30 27 C 10.4086 0.651784 0.0 0
M  V30 28 C 12.1399 0.650487 0.0 0
M  V30 29 C 11.2796 -0.850819 0.0 0
M  V30 30 C 12.1425 -0.345196 0.0 0
M  V30 31 P 7.81105 -1.84859 0.0 0
M  V30 32 P 11.2832 -1.85081 0.0 0
M  V30 33 C 5.86105 -1.87359 0.0 0
M  V30 34 C 13.2332 -1.82581 0.0 0
M  V30 35 C 4.36338 -2.74017 0.0 0
M  V30 36 C 5.36102 -2.74043 0.0 0
M  V30 37 C 3.86233 -1.87366 0.0 0
M  V30 38 C 5.35799 -1.00362 0.0 0
M  V30 39 C 4.35794 -1.01009 0.0 0
M  V30 40 C 14.7309 -0.959238 0.0 0
M  V30 41 C 13.7332 -0.958978 0.0 0
M  V30 42 C 15.2319 -1.82574 0.0 0
M  V30 43 C 13.7362 -2.69578 0.0 0
M  V30 44 C 14.7363 -2.68932 0.0 0
M  V30 45 C 5.92894 -3.8807 0.0 0
M  V30 46 C 5.48269 -5.55247 0.0 0
M  V30 47 C 6.18831 -4.84722 0.0 0
M  V30 48 C 4.51568 -5.29405 0.0 0
M  V30 49 C 4.95806 -3.62125 0.0 0
M  V30 50 C 4.25549 -4.33297 0.0 0
M  V30 51 C 13.2403 -3.75792 0.0 0
M  V30 52 C 14.9121 -4.20417 0.0 0
M  V30 53 C 14.2068 -3.49855 0.0 0
M  V30 54 C 14.6536 -5.17118 0.0 0
M  V30 55 C 12.9808 -4.7288 0.0 0
M  V30 56 C 13.6926 -5.43137 0.0 0
M  V30 END ATOM
M  V30 BEGIN BOND
M  V30 1 1 1 2
M  V30 2 2 2 3
M  V30 3 1 3 4
M  V30 4 2 4 5
M  V30 5 1 5 6
M  V30 6 2 6 7
M  V30 7 1 7 8
M  V30 8 1 7 9
M  V30 9 2 9 10
M  V30 10 1 10 11
M  V30 11 1 11 5
M  V30 12 2 11 12
M  V30 13 1 12 13
M  V30 14 2 13 14
M  V30 15 1 14 4
M  V30 16 1 14 15
M  V30 17 2 15 16
M  V30 18 1 16 2
M  V30 19 2 20 18
M  V30 20 2 21 19
M  V30 21 1 18 22
M  V30 22 1 19 20
M  V30 23 2 22 23
M  V30 24 1 23 21
M  V30 25 1 19 24
M  V30 26 1 24 25
M  V30 27 2 27 25
M  V30 28 2 28 26
M  V30 29 1 25 29
M  V30 30 1 26 27
M  V30 31 2 29 30
M  V30 32 1 30 28
M  V30 33 1 21 31
M  V30 34 1 29 32
M  V30 35 1 31 33
M  V30 36 1 32 34
M  V30 37 2 36 33
M  V30 38 2 37 35
M  V30 39 1 33 38
M  V30 40 1 35 36
M  V30 41 2 38 39
M  V30 42 1 39 37
M  V30 43 2 41 34
M  V30 44 2 42 40
M  V30 45 1 34 43
M  V30 46 1 40 41
M  V30 47 2 43 44
M  V30 48 1 44 42
M  V30 49 8 6 17
M  V30 50 8 17 3
M  V30 51 1 31 45
M  V30 52 2 47 45
M  V30 53 2 48 46
M  V30 54 1 45 49
M  V30 55 1 46 47
M  V30 56 2 49 50
M  V30 57 1 50 48
M  V30 58 1 32 51
M  V30 59 2 53 51
M  V30 60 2 54 52
M  V30 61 1 51 55
M  V30 62 1 52 53
M  V30 63 2 55 56
M  V30 64 1 56 54
M  V30 65 8 17 31
M  V30 66 8 17 32
M  V30 END BOND
M  V30 END CTAB
M  END
</chemform>

====Investigation====
{{#experimentlist:|form=Photocatalytic_CO2_conversion_experiments|name=CO2 reduction experiments with different catalysts|importFile=}}

{{#experimentlist:|form=Photocatalytic_CO2_conversion_experiments|name=CO2 reduction experiments testing different catalysts|importFile=}}

====Sacrificial electron donor====
In this study, the experiments were done with the sacrificial electron donor BIH ([[Molecule:100508|100508]]).
====Additives====
In this study, control experiments with Hg and without CO<sub>2</sub> were conducted.