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Updated: Sep 9, 2025
Hydrogen Production and Utilization in a Membrane Reactor
Published on: March 10, 2023
Electrochemistry-Accelerated Water-Gas Shift Reaction on IrN4-RhN4 Dual Sites Catalysts for Efficient Hydrogen
Qie Liu1, Liyuan Gong1, Jingjing Wang1
1State Key Laboratory of Chemo and Biosensing, College of Chemistry and Chemical Engineering, International Joint Lab of Energy Electrochemistry of the Ministry of Education, Hunan University, Changsha, 410082, China.
Abstract:
The water-gas shift reaction (WGSR) is crucial to the hydrogen economy, which is hampered by the harsh conditions and complicated purification process. In this work, the spatially separated efficient CO conversion and high-purity H2 production are realized by electrochemistry-accelerated water-gas shift reaction (WGSR) with IrN4-RhN4 dual sites single atom catalysts (IrRh-NC) in high-temperature polymer-electrolyte-membrane electrolyzer. In this reaction, the Ir single atoms in the catalysts can rapidly dissociate H2O at an extremely low potential to supply abundant *OH, which ensures the *OH groups bind to the spontaneously adsorbed *CO on neighboring Rh sites to further accelerate CO conversion. What's more, the elevated temperatures (120-300 °C) maintain water in the gaseous state during the reaction, thus greatly facilitating mass transfer of the reactants CO and H2O within the reactor. Employing IrRh-NC as the anodic catalyst, the electrolyzer achieves superior CO catalytic performance (424 mA cm-2 at 0.4 V) and high purity (99.9%) H2 production (3.2 ml min-1), surpassing the performance of particle catalysts. This work illuminates the tantalizing possibility for sustainable hydrogen economic development.
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