@article {49079, title = {Electrocatalytic glycerol conversion: a low-voltage pathway to efficient carbon-negative green hydrogen and value-added chemical production}, journal = {ACS Applied Materials and Interfaces }, volume = {16}, year = {2024}, month = {MAY }, pages = {26130-26141}, type = {Article}, abstract = {

Electrochemical glycerol oxidation reaction (GLYOR) could be a promising way to use the abundantly available glycerol for production of value-added chemicals and fuels. Completely avoiding the oxygen evolution reaction (OER) with GLYOR is an evolving strategy to reduce the overall cell potential and generate value-added chemicals and fuels on both the anode and cathode. We demonstrate the morphology-controlled palladium nanocrystals, afforded by colloidal chemistry, and their established morphology-dependent GLYOR performance. Although it is known that controlling the morphology of an electrocatalyst can modulate the activity and selectivity of the products, still it is a relatively underexplored area for many reactions, including GLYOR. Among nanocube (Pd-NC), truncated octahedron (Pd-TO), spherical and polycrystalline (Pd-PC) morphologies, the Pd-NC electrocatalyst deposited on a Ni foam exhibits the highest glycerol conversion (85\%) along with 42\% glyceric acid selectivity at a low applied potential of 0.6 V (vs reversible hydrogen electrode (RHE)) in 0.1 M glycerol and 1 M KOH at ambient temperature. Owing to the much favorable thermodynamics of GLYOR on the Pd-NC surface, the assembled electrolyzer requires an electricity input of only similar to 3.7 kWh/m(3) of H-2 at a current density of 100 mA/cm(2), in contrast to the requirement of \>= 5 kWh/m(3) of H-2 with an alkaline/PEM electrolyzer. Sustainability has been successfully demonstrated at 10 and 50 mA/cm(2) and up to 120 h with GLYOR in water and simulated seawater.

}, keywords = {electrocatalysis, Glycerol, green hydrogen, nanocube, Palladium, SDG}, issn = {1944-8244}, doi = {10.1021/acsami.4c02392}, author = {Chauhan, Inderjeet and Bajpai, Himanshu and Ray, Bishakha and Kolekar, Sadhu K. and Datar, Suwarna and Patra, Kshirodra Kumar and Gopinath, Chinnakonda S.} } @article {49323, title = {Oxidative and selective C-C cleavage of glycerol to glycolaldehyde with atom-like Cu on Cu-TiO2: photocatalytic water reduction with concurrent glycerol oxidation in sunlight}, journal = {Journal of Catalysis}, volume = {437}, year = {2024}, month = {SEP}, pages = {115644}, type = {Article}, abstract = {

Concurrent consumption of electrons and holes for the conversion of a biomass component to value added products represents a highly efficient and sustainable approach towards utilizing renewable energy, but difficult to achieve. The integration of hydrogen production with glycerol oxidation presents a novel and sustainable approach towards achieving a circular economy. In the current study, integration of atom-like Cu-clusters onto TiO2 substrate has been achieved using a facile photo-deposition technique (TC-PDO). Also, novel synthetic approaches have been employed to augment the surface coverage of Cu on TiO2 with atom-like clusters of Cu, either by borohydride treatment on TiO2 followed by Cu-deposition (TC-200) or oxygen-vacancy creation by UV illumination followed by Cu-deposition (TC-PDO). Increased dispersion and enhanced electronic integration of Cu with TiO2 lead to a corresponding increase in the efficiency of photocatalytic hydrogen evolution (13.8 mmol/h.g for TC-PDO at pH 9). Several atom-like Cu integrated with each TiO2 particle acts as photocatalytic reactor, and the same enhances electron-hole separation as well as activity. Sustainable aspect was also studied for TC-PDO up to 25 h at pH 9. Concurrently, glycerol oxidation displays the highest selectivity to C2 product (glycolaldehyde with 70 \%) with a C-C cleavage. The investigation of this process holds significant potential for the extensive and simultaneous exploitation of electrons and holes in order to achieve water splitting and glycerol oxidation towards selective value-added products formation.

}, keywords = {C -C Cleavage, Glycerol, nanotechnology, Photo -deposition, solar energy conversion}, issn = {0021-9517}, doi = {10.1016/j.jcat.2024.115644}, author = {Bajpai, Himanshu and Nivedhitha, Thazhath R. and Dais, Elsa and Kanungo, Subhashree S. and Gopinath, Chinnakonda S.} } @article {49947, title = {Europium oxide on carbon nitride for electrocatalytic glycerol oxidation coupled with hydrogen evolution reaction}, journal = {Separation and Purification Technology}, volume = {372}, year = {2025}, month = {NOV }, pages = {133442}, type = {Article}, abstract = {

{The integration of the electrochemical glycerol oxidation reaction (GOR) with the hydrogen evolution reaction (HER) has emerged as a promising alternative to the sluggish oxygen evolution reaction (OER) in water splitting toward the development of renewable and clean energy sources. However, suitable electrodes that facilitate redox kinetics while increasing the selectivity of the desired product(s) are still required. Herein, a series of europium oxide (Eu2O3) anchored on graphitic carbon nitride (g-CN) nanoaggregates (g-CNEux

}, keywords = {carbon support, electrocatalysis, Glycerol, HER, Rare earth metal}, issn = {1383-5866}, doi = {10.1016/j.seppur.2025.133442}, author = {Jana, Jayasmita and Sharma, Tata Sanjay Kanna and Ghanem, Mohamed A. and Choi, Won Mook and Gopinath, Chinnakonda S. and Hur, Seung Hyun} }