Related Experiment Video
Updated: Aug 12, 2025
Hydrogen Production and Utilization in a Membrane Reactor
Published on: March 10, 2023
Electrothermal Water-Gas Shift Reaction at Room Temperature with a Silicomolybdate-Based Palladium Single-Atom
Jinquan Chang1,2, Max J Hülsey2, Sikai Wang1,2
1Joint School of National University of Singapore and Tianjin University, International Campus of Tianjin University Binhai, New City, Fuzhou, 350207, China.
Abstract:
The water-gas shift (WGS) reaction is often conducted at elevated temperature and requires energy-intensive separation of hydrogen (H2 ) from methane (CH4 ), carbon dioxide (CO2 ), and residual carbon monoxide (CO). Designing processes to decouple CO oxidation and H2 production provides an alternative strategy to obtain high-purity H2 streams. We report an electrothermal WGS process combining thermal oxidation of CO on a silicomolybdic acid (SMA)-supported Pd single-atom catalyst (Pd1 /CsSMA) and electrocatalytic H2 evolution. The two half-reactions are coupled through phosphomolybdic acid (PMA) as a redox mediator at a moderate anodic potential of 0.6 V (versus Ag/AgCl). Under optimized conditions, our catalyst exhibited a TOF of 1.2 s-1 with turnover numbers above 40 000 mol molPd -1 achieving stable H2 production with a purity consistently exceeding 99.99 %.
