Figure 4: Influence of temperature on the hydrogenation of CO2 to formic acid using [RuCl2(PTA)4] as the catalyst: 90 °C (brown circle), 60 °C (red diamond), 50 °C (blue square), 40 °C (green asterisk) and 30 °C (pink triangle). | Nature Communications

Figure 4: Influence of temperature on the hydrogenation of CO2 to formic acid using [RuCl2(PTA)4] as the catalyst: 90 °C (brown circle), 60 °C (red diamond), 50 °C (blue square), 40 °C (green asterisk) and 30 °C (pink triangle).

From: Direct synthesis of formic acid from carbon dioxide by hydrogenation in acidic media

Figure 4

Conditions: [RuCl2(PTA)4] was dissolved in H2O (2.76 mM, 2 ml), under N2 atmosphere. The solution was pressurized at room temperature with CO2 (50 bar) and completed with H2 to 100 bar. The system was heated to the desired temperature and the reaction was monitored by 1H NMR spectroscopy until the equilibrium of the reaction was reached. The values are averaged from three to six measurements with a reproducibility of ±15%.

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