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<p>Photoelectrocatalytic (PEC) reduction of carbon dioxide (CO<sub>2</sub>) with water (H<sub>2</sub>O) into syngas not only alleviates energy and environmental crises but also provides feed gas for producing high-value chemicals. In this study, self-supported N<sub><i>y</i></sub>-Cu<sub>2</sub>O/CuFs are successfully prepared using copper foam as a precursor, following a self-assembly strategy to fabricate a PEC system for converting CO<sub>2</sub> and H<sub>2</sub>O into syngas. N-doping facilitates the preferential growth of Cu<sub>2</sub>O (111) crystal planes in N<sub><i>y</i></sub>-Cu<sub>2</sub>O/CuF, resulting in high surface oxygen vacancies. Simultaneously, appropriate surface electronic structure and good light capture capability endow the synthesized material with excellent PEC properties, achieving a syngas yield 2.5 times higher than that of the unmodified Cu<sub><i>x</i></sub>O/CuF, with a CO yield of 58.72&#xa0;μmol/(cm<sup>2</sup>·h) and the lowest H<sub>2</sub>/CO ratio of 1.6. This study provides a promising strategy for developing high-performance photocathodes for CO<sub>2</sub>-efficient conversion.</p>

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Photoelectrocatalytic Reduction of CO2 to Syngas on N-Modified Self-Supporting Ny-Cu2O/CuF Photocathode

  • 期刊论文

  • 发表日期：

    2026年4月20日

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  • Nannan Liang,
  • Xiangyu Xu,
  • Huihui Ma,
  • Zihao Yu,
  • Dongxu Chen,
  • Haiyang Liu,
  • Yanji Wang,
  • Aizhong Jia

摘要

Photoelectrocatalytic (PEC) reduction of carbon dioxide (CO2) with water (H2O) into syngas not only alleviates energy and environmental crises but also provides feed gas for producing high-value chemicals. In this study, self-supported Ny-Cu2O/CuFs are successfully prepared using copper foam as a precursor, following a self-assembly strategy to fabricate a PEC system for converting CO2 and H2O into syngas. N-doping facilitates the preferential growth of Cu2O (111) crystal planes in Ny-Cu2O/CuF, resulting in high surface oxygen vacancies. Simultaneously, appropriate surface electronic structure and good light capture capability endow the synthesized material with excellent PEC properties, achieving a syngas yield 2.5 times higher than that of the unmodified CuxO/CuF, with a CO yield of 58.72 μmol/(cm2·h) and the lowest H2/CO ratio of 1.6. This study provides a promising strategy for developing high-performance photocathodes for CO2-efficient conversion.