A MOF-74(Ni) derived partially oxidized Ni@C catalyst for SO electro-oxidation integrated with solar driven hydrogen evolution

• Published in: Sustainable energy & fuels 2021-07, Vol.5 (14), p.3588-3592
• Main Authors: Guo, Jin-Han, Wei, Xuming, Sun, Wei-Yin
• Format: Article
• ISSN: 2398-4902
• DOI: 10.1039/d1se00645b

The SO 2 electro-oxidation reaction (SO 2 OR) is a feasible tactic to alleviate SO 2 pollution and an alternative to the oxygen evolution reaction (OER) in the electro-production of H 2 . However, efficient SO 2 OR catalysts are still limited to Pt and Au. Here, we report an efficient partially oxidized Ni@C (po-Ni@C) SO 2 OR catalyst, which exhibits better performance than the 20% Pt/C catalyst. Also, utilizing the po-Ni@C catalyst mediated SO 2 OR to replace the Ti/IrO 2 -Ta 2 O 5 catalyzed OER can vastly alleviate the electro-consumption in the hydrogen electro-production. Furthermore, a solar to hydrogen electrolyzer was established and delivered ∼25 mA current powered by a 1 V commercial silicon solar cell. This work may provide a new strategy for the design of SO 2 OR catalysts and establish waste SO 2 treatment and H 2 electro-production systems. An efficient partially oxidized Ni@C (po-Ni@C) catalyst was developed for SO 2 electro-oxidation reaction (SO 2 OR). Also, a solar to hydrogen electrolyzer was established base on the catalyst and delivered ∼25 mA current powered by a 1 V solar cell.