The significant rise in atmospheric carbon dioxide (CO 2 ) levels has prompted the need to develop efficient methods for CO 2 conversion and fixation methods. Electrocarboxylation reaction is a highly efficient and sustainable method for activating and utilizing CO 2 , yielding essential carboxylic acids and their analogues, which are important intermediates in the pharmaceutical and fuel industries. This research demonstrates the efficiency of 2D Ti 3 C 2 T x and Ta 2 CT x MXene-modified carbon fiber paper electrodes (Ti 3 C 2 T x /CFP and Ta 2 CT x /CFP) for CO 2 fixation with benzophenone in a tetrabutylammonium bromide/acetonitrile (TBABr/CH 3 CN) medium, yielding benzilic acid. Ti 3 C 2 T x /CFP exhibited superior electrocatalytic activity with a lower reduction potential for benzophenone at −1.0 V and achieved a 72% yield of benzilic acid at an optimum current density of 50 mA cm −2 . In comparison, Ta 2 CT x /CFP exhibited a cathodic peak at −1.08 V, producing a 66% yield at 70 mA cm −2 . The electron paramagnetic resonance spectrum substantiates the generation of reactive radical intermediates during the reaction. Ti 3 C 2 T x /CFP showed robust structural stability with ∼88% Faradaic efficiency and a turnover frequency of 1.90444 × 10 −5 s −1 , indicating its potential for CO 2 fixation.