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Updated: Sep 17, 2025
Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction
Published on: April 10, 2018
Gadolinium-Mediated Oxygen Affinity Induced Efficient Covalorization of CH4 and N2O in an Ir-Gd2O3 Single-Atom
Yunshuo Wu1,2, Haiqiang Wang1,2, Feng-Shou Xiao3
1College of Environmental & Resource Sciences, Zhejiang University, Hangzhou 310058, P.R. China.
None:
Valorization of nitrous oxide (N2O) and methane (CH4) for chemicals has garnered growing interest for mitigating their climate impact. Dry reforming of methane (DRM) with industrial N2O exhaust offers a promising route. However, the DRM reaction often requires rigorous temperatures (>650 °C) accompanied by overoxidation, hindering CO and H2 formation due to weak oxygen binding on catalysts. Here, we report a Gd2O3-supported iridium single-atom catalyst (SAC), with an effective Ir1-Gd2O3 synergy. At only 450 °C, it exhibits high N2O (99.3%) and CH4 (48.2%) conversion and syngas yields (138.3 mol of CO kgcat-1 h-1 and 184.9 mol of H2 kgcat-1 h-1) and a H2/CO ratio of 1.34, over 100 h. Mechanism studies revealed that Gd2O3 enabled controlled oxygen release for CO production, while Ir single atoms facilitated CH4 activation and H2 formation. This work presents a low-temperature, sustainable strategy for greenhouse gas utilization and highlights the potential of Gd2O3-based single-atom catalysts in heterogeneous catalysis.
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