Details

Autor(en) / Beteiligte

• Sheng, Wenchao
• Kattel, Shyam
• Yao, Siyu
• Yan, Binhang
• Liang, Zhixiu
• Hawxhurst, Christopher J
• Wu, Qiyuan
• Chen, Jingguang G

Titel

Electrochemical reduction of CO2 to synthesis gas with controlled CO/H2 ratios

Ist Teil von

• Energy & environmental science, 2017, Vol.10 (5), p.1180-1185

Ort / Verlag

Cambridge: Royal Society of Chemistry

Erscheinungsjahr

2017

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The electrochemical carbon dioxide reduction reaction (CO2RR) to simultaneously produce carbon monoxide (CO) and hydrogen (H2) has been achieved on carbon supported palladium (Pd/C) nanoparticles in an aqueous electrolyte. The synthesis gas product has a CO to H2 ratio between 0.5 and 1, which is in the desirable range for thermochemical synthesis of methanol and Fischer-Tropsch reactions using existing industrial processes. In situ X-ray absorption spectroscopy in both near-edge (XANES) and extended regions (EXAFS) and in situ X-ray diffraction show that Pd has transformed into beta -phase palladium hydride ( beta -PdH) during the CO2RR. Density functional theory (DFT) calculations demonstrate that the binding energies of both adsorbed CO and H are significantly weakened on PdH than on Pd surfaces, and that these energies are potential descriptors to facilitate the search for more efficient electrocatalysts for syngas production through the CO2RR.