The functionality of surface hydroxyls on selective CH4 generation from photoreduction of CO2 over SiC nanosheets

Cheng Han; Yongpeng Lei; Bing Wang; Chunzhi Wu; Xiaoshan Zhang; Shujin Shen; Lian Sun; Qiong Tian; Qingguo Feng; Yingde Wang

doi:10.1039/C8CC09371G

The functionality of surface hydroxyls on selective CH₄ generation from photoreduction of CO₂ over SiC nanosheets†

Cheng Han,

^a Yongpeng Lei,

^bc Bing Wang,

^a Chunzhi Wu,^a Xiaoshan Zhang,^a Shujin Shen,^a Lian Sun,

^a Qiong Tian,^a Qingguo Feng^de and Yingde Wang

*^a

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* Corresponding authors

^a Science and Technology on Advanced Ceramic Fiber and Composites Laboratory, College of Aerospace Science and Engineering, National University of Defense Technology, Changsha 410073, China
E-mail: wangyingde@nudt.edu.cn

^b State Key Laboratory for Powder Metallurgy, Central South University, Changsha 410083, China

^c Hunan Provincial Key Laboratory of Chemical Power Sources, College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China

^d Key Laboratory of Advanced Technologies of Materials, Ministry of Education, and Institute of Materials Dynamics, Southwest Jiaotong University, Chengdu, China

^e National Joint Engineering Laboratory of Power Grid with Electric Vehicles, Shandong University, Jinan 250061, China

Abstract

The surface hydroxyls on SiC nanosheets provide local protons, stabilize intermediates and localize photogenerated electrons in the deep photoreduction of CO₂, significantly promoting the efficiency and selectivity of CH₄ yield. This study describes the surface reaction for selective CO₂ reduction based on both thermodynamic and kinetic requirements.

Chemical Communications

The functionality of surface hydroxyls on selective CH₄ generation from photoreduction of CO₂ over SiC nanosheets†

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The functionality of surface hydroxyls on selective CH₄ generation from photoreduction of CO₂ over SiC nanosheets

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