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Hydrogen Sulfide Splitting into Hydrogen and Sulfur through Off-Field Electrocatalysis.
Wang, Zijin; Wang, Qing-Nan; Ma, Weiguang; Liu, Tiefeng; Zhang, Wei; Zhou, Panwang; Li, Mingrun; Liu, Xinyi; Chang, Qingbo; Zheng, Haibing; Chang, Ben; Li, Can.
Afiliación
  • Wang Z; State Key Laboratory of Catalysis, Fundamental Research Center of Artificial Photosynthesis (FReCAP), Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China.
  • Wang QN; State Key Laboratory of Catalysis, Fundamental Research Center of Artificial Photosynthesis (FReCAP), Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China.
  • Ma W; Marine Engineering College, Clean Energy Center for Ship, Dalian Maritime University, Dalian 116026, China.
  • Liu T; State Key Laboratory of Catalysis, Fundamental Research Center of Artificial Photosynthesis (FReCAP), Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China.
  • Zhang W; State Key Laboratory of Catalysis, Fundamental Research Center of Artificial Photosynthesis (FReCAP), Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China.
  • Zhou P; State Key Laboratory of Catalysis, Fundamental Research Center of Artificial Photosynthesis (FReCAP), Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China.
  • Li M; State Key Laboratory of Catalysis, Fundamental Research Center of Artificial Photosynthesis (FReCAP), Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China.
  • Liu X; State Key Laboratory of Catalysis, Fundamental Research Center of Artificial Photosynthesis (FReCAP), Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China.
  • Chang Q; State Key Laboratory of Catalysis, Fundamental Research Center of Artificial Photosynthesis (FReCAP), Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China.
  • Zheng H; State Key Laboratory of Catalysis, Fundamental Research Center of Artificial Photosynthesis (FReCAP), Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China.
  • Chang B; State Key Laboratory of Catalysis, Fundamental Research Center of Artificial Photosynthesis (FReCAP), Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China.
  • Li C; State Key Laboratory of Catalysis, Fundamental Research Center of Artificial Photosynthesis (FReCAP), Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China.
Environ Sci Technol ; 58(24): 10515-10523, 2024 Jun 18.
Article en En | MEDLINE | ID: mdl-38622088
ABSTRACT
Hydrogen sulfide (H2S), a toxic gas abundant in natural gas fields and refineries, is currently being removed mainly via the Claus process. However, the emission of sulfur-containing pollutants is hard to be prevented and the hydrogen element is combined to water. Herein, we report an electron-mediated off-field electrocatalysis approach (OFEC) for complete splitting of H2S into H2 and S under ambient conditions. Fe(III)/Fe(II) and V(II)/V(III) redox mediators are used to fulfill the cycles for H2S oxidation and H2 production, respectively. Fe(III) effectively removes H2S with almost 100% conversion during its oxidation process. The H+ ions are reduced by V(II) on a nonprecious metal catalyst, tungsten carbide. The mediators are regenerated in an electrolyzer at a cell voltage of 1.05 V, close to the theoretical potential difference (1.02 V) between Fe(III)/Fe(II) and V(II)/V(III). In a laboratory bench-scale plant, the energy consumption for the production of H2 from H2S is estimated to be 2.8 kWh Nm-3 H2 using Fe(III)/Fe(II) and V(II)/V(III) mediators and further reduced to about 0.5 kWh Nm-3 H2 when employing well-designed heteropolyacid/quinone mediators. OFEC presents a cost-effective approach for the simultaneous production of H2 and elemental sulfur from H2S, along with the complete removal of H2S from industrial processes. It also provides a practical platform for electrochemical reactions involving solid precipitation and organic synthesis.
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Texto completo: 1 Colección: 01-internacional Banco de datos: MEDLINE Asunto principal: Azufre / Hidrógeno / Sulfuro de Hidrógeno Idioma: En Revista: Environ Sci Technol Año: 2024 Tipo del documento: Article País de afiliación: China

Texto completo: 1 Colección: 01-internacional Banco de datos: MEDLINE Asunto principal: Azufre / Hidrógeno / Sulfuro de Hidrógeno Idioma: En Revista: Environ Sci Technol Año: 2024 Tipo del documento: Article País de afiliación: China