▎ 摘　　要

NOVELTY - Forming (P1) upon at least one electrode, a film of a nanocrystalline carbon with a 1 dimensional (D), 2D, or 3D structure and a nanocrystalline diamond, amorphous carbon and a metal-carbon nanomaterial composite containing a post-transition metal or a transition metal, comprises electrochemically reducing oxygenic organic compound and metallic cation simultaneously under ambient conditions at an onset potential of ≯ 10 Volt in presence of electrolyte and at least one electrode, where the electrode comprising a metallic material is a post-transition element, a transition element, and an alloy. USE - The method is useful for forming, upon at least one electrode, a film of a nanocrystalline carbon with a 1D, 2D, or 3D structure and a nanocrystalline diamond, amorphous carbon and a metal-carbon nanomaterial composite containing a post-transition metal or a transition metal which is useful for film of nanocrystalline carbon (claimed). ADVANTAGE - None given. DETAILED DESCRIPTION - INDEPENDENT CLAIMs are also included for: process (P2) for forming, upon a cathode (420), a film of a nanocrystalline carbon with a ID, 2D, or 3D structure and/or a nanocrystalline diamond and/or an amorphous carbon and/or a metal-carbon nanomaterial composite, the composite containing a post-transition metal and a transition metal, comprising electrochemically reducing oxygenic organic compound and a metallic cation simultaneously in presence of electrolyte that is separated into an anolyte (310) and a catholyte (410), an anode (320) submerged in the anolyte and the cathode submerged in the catholyte, where the catholyte comprises a mixture of 1-butyl-3-methylimidazolium tetrafluoroborate, ammonium sulfate or sodium sulfate, a metallic cation precursor, the oxygenic organic compound, and water, where the electrochemically reducing the oxygenic organic compound and the metallic cation simultaneously occurs under ambient conditions at an onset potential ≯ 10 Volt; process (P3) for forming, upon a cathode, a film of a nanocrystalline carbon with a ID, 2D, or 3D structure and/or a nanocrystalline diamond and/or an amorphous carbon and/or a metal-carbon nanomaterial composite, the composite containing a post-transition metal and a transition metal, comprising electrochemically reducing oxygenic organic compound and metallic cation simultaneously in presence of electrolyte, anode and cathode submerged in the electrolyte, where the electrolyte comprises a mixture of 1-butyl-3-methylimidazolium tetrafluoroborate, ammonium sulfate or sodium sulfate, a metallic cation precursor, the oxygenic organic compound, and water, where the electrochemically reducing the oxygenic organic compound and the metallic cation simultaneously occurs under ambient conditions at an onset potential of ≯ 10 Volt; film (F1) of nanocrystalline carbon with a 1D, 2D, or 3D structure and/or a nanocrystalline diamond and/or an amorphous carbon and/or a metal-carbon nanomaterial composite, the composite containing a post-transition metal or a transition metal, is obtained from the processes (P1)-(P3); and film (F2) that is a mixture having various carbon structures comprising a nanocrystalline diamond, an amorphous carbon, a graphitic carbon, and a metal-carbon nanomaterial composite, the composite containing a post-transition metal or a transition metal, the product is obtained from the processes (P1)-(P3). DESCRIPTION OF DRAWING(S) - The figure shows a schematic view of the electrochemical cell. 10Electrochemical cell 310Anolyte 320Anode 410Catholyte 420Cathode