2025-07-14 中国科学院（CAS）
The electrified dry reforming of methane mechanism for net-negative greenhouse gas emissions. (Image by NIMTE)
＜関連情報＞
- https://english.cas.cn/newsroom/research_news/chem/202507/t20250709_1047071.shtml
- https://www.science.org/doi/10.1126/sciadv.adv1585
Ni-La2O3担持活性炭上でのメタンの電解乾式改質： 正味CO2マイナス反応 Electrified dry reforming of methane on Ni-La2O3–loaded activated carbon: A net CO2-negative reaction
Wei Zhao, Xueyi Mei, Yexin Zhang, Zhenghui Zhang, […] , and Jian Zhang
Science Advances Published:11 Jul 2025
DOI:https://doi.org/10.1126/sciadv.adv1585
Abstract
Dry reforming of methane (DRM) offers an attractive solution for the high-value utilization of two primary greenhouse gasses, methane and carbon dioxide, but its industrial applications are hindered by the net carbon dioxide–positive emissions resulting from substantial energy consumption. Here, we developed an electrified technology by passing electric current through a conductive catalyst constituting nickel and lanthanum(III) oxide cosupported on activated carbons, reaching thermodynamic equilibrium conversions and sustaining for at least 120 hours. Notably, the energy efficiency (2.976 millimoles per kilojoule) exceeds all the previously reported values, enabling net carbon dioxide–negative emissions powered by common sustainable electricity. An electrically driven release of lattice oxygen bridges the decomposition of the lanthanum oxycarbonate intermediate generated from carbon dioxide activation and the reduction of the resultant nickel oxide species by deposited carbon from methane dissociation, thus inhibiting excessive nickel oxidation and lanthanum(III) oxide carbonatation. The electrified approach would make DRM a true pathway mitigating overall carbon footprint and combating global warming.
