Page 181 - CW E-Magazine (14-11-2023)

Special Report

stable. This strategy may be applicable Comprehensive comparisons Non-precious metal catalysts
to similar separations. (ACS Sustainable between Direct and Alternative for two-electron oxygen reduc-
Chem. Eng., 2023; DOI: 10.1021/acssus- current (AC) electrolysis in tion reaction
chemeng.3c02539). organic synthesis
L. Zeng et al have referred to the interest A. Byeon et al have worked on non-pre-
Perspectives on current and in organic electrosynthesis, academically cious metal catalysts for the title reac-
future Ir demand and Ir oxide as well as industrially. Direct current tion, which is attracting a lot of attention
catalyst for PEM water electro- electricity is used in the majority of as this can be done in a distributed way
lysis (PEMWE) processes. A comprehensive theoretical
framework is presented covering recent
M. Clapp et al have modelled the future
Ir demand of Proton Exchange Mem- based on renewable energy. The 2-ethyl-
brane (PEM) water electrolysis. Ir is anthraquinone based process, which
a critical item and has limited supply. was itself a breakthrough, has some
Thus, recycling is important. Their ana- problems and only practiced on large
lysis shows that 20% of annual Ir supply scale. Catalysts such as a transition metal
could enable 1.3-TW of electrolysis (Fe, Cu, Ni) heteroatom (N, B, O, S)
capacity by 2050. Ir is an O evolu- moiety or mesoporous structure are
2
tion reaction catalyst. Different types considered. The role of MOF is referred.
of Ir-based anode catalysts have been This review has discussed recently
compared. There is a need for greater reported work. (ChemElectroChem.;
research focus on catalyst stability and DOI: 10.1002/ceic.202300234).
ability to make homogeneous catalyst
layers at low Ir loadings. These authors advancements. Avoidance of deposition Electrochemical transforma-
are of the view that a terawatt-scale of metal catalysts is referred when AC is tion of DL-Glutamic acid (GA)
PEMWE industry can avoid being con- used. The precision in modulating oxi-
strained by Ir supply. (Catalysis Today; dation and reduction intensities and the into acrylonitrile (ACN)
DOI: 10.1016/j.cattod.2023.114140). mitigation of mass transfer processes is
covered. (Angew. Chem. Intl. Ed.; DOI: J. Kumper et al in pursuit of making
Pairing electrocarboxylation of 10.1002/anie.202309620). petrochemicals through renewable raw
unsaturated bonds with oxida- materials have approached the title pro-
tive transformation of alcohol Promoting CO electroreduc- cess. Biogenic DL-GA was subjected to
2
electro-oxidative decarboxylation and
and amine tion to multi-carbon products non-Kolbe electrolysis to get ACN. A
[Paired electrochemical reactions are by hydrophobicity-induced two-step process has been developed
receiving attention where both anodic electro-kinetic retardation with a maximum yield of 41%. GA goes
and cathodic reactions are simultane- [CO reduction continues to attract a lot to potassium 3-cyanopropionate, which on
2
ously conducted and this column has of attention, catalytically and electro- electrolysis goes to ACN (Green Chem.
covered some papers.] catalytically.] 2023; DOI, 10.1039/D3GC01045G).

X. Zhang et al have conducted electro- M. Zhuansun et al have made advances
caboxylation incorporating CO in the Cu-catalysed electrochemical Cyclodextrin (CD)-supported
2
into ketone, and imine and alkene with reduction reaction. The wettable pris- Co(OH) clusters as electrocata-
2
alcohol oxidation or oxidative cyanation tine Cu surface often suffers from low lysts for efficient and selective
of amine for the first time. Through this exposure to CO . These authors have H O synthesis.
2
strategy various carboxylic acids as well used polynorbornene ionomers and the 2 2
as aldehyde/ketone or α-nitrile amine unconventional electro-kinetic effect D. Qi et al have come out with the
were made in a divided cell. Thus, the is demonstrated by the increased Tafel title catalyst, which are made via mild
total Faradaic efficiency was 166%. slopes. Thus, the strongly hydrophobic and facile method. This catalyst gave
There is a reference to make naproxen and Cu electrodes exhibit C Faradaic effi- remarkable H O selectivity of 94 to 98%,
2
2
2+
ibuprofen through this route. (ChemSus- ciencies of about 90%. (Angew.Chem. with good stability, and ultra-high H O
2
2
Chem; DOI: 10.1002/cssc.2023 00807). Intl.Ed.; DOI: 10.1002/anie.202309875). product yield rate of 5.58 mol per gm
Chemical Weekly November 14, 2023 181

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