A non-life process making glucose from carbon dioxide and water using electricity or light?
Popular research these days for CO2 fixation involves the following enzymes with associated conversion rate:

RuBisCO - 10 molecules/sec
ECR(Enoxyl-CoA carboxylase/reductase) - 80
molecules/sec

The major noncarbohydrate precursors are lactate, amino acids, and glycerol.
Here are some links to current research:

TiO2-catalyzed synthesis of sugars from formaldehyde
CO2 reduction -&gt; Hydrocarbon eg. Formaldehydes/acids (CH2O).
Then Formose/Butlerov reaction (catalyst:base+Ca/Mg) -&gt; sugar
Volume 1 of Comprehensive Glycoscience
CO2 to Glucose Whitepaper

Some topics for research:

Gluconeogenesis
Formose reaction
Calvin cycle (absence of light)