Front Matter -- Measurement Systems and Parameters for CO 2 Photo/Electro-Conversion / Li Li, Zhenwei Zhao, Xinyi Wang, Zhicheng Zhang -- CO 2 Photo/Electro-Conversion Mechanism / Yalin Guo, Shenghong Zhong, Jianfeng Huang -- Cu -Based Metal Materials for Electrocatalytic CO 2 Reduction / Junjun Li, Yongxia Shi, Man Hou, Zhicheng Zhang -- Cu-Free Metal Materials for Electrocatalytic CO 2 Conversion / Zhiqi Huang, Qingfeng Hua -- Organic-Inorganic Hybrid Materials for CO 2 Photo/Electro-Conversion / Peilei He -- Metal-Organic Framework Materials for CO 2 Photo-/Electro-Conversion / Bingqing Yao, Xiaoya Cui, Zhicheng Zhang -- Covalent Organic Frameworks for CO 2 Photo/Electro-Conversion / Ting He -- Single/Dual-Atom Catalysts for CO 2 Photo/Electro-Conversion / Honghui Ou, Yao Wang -- Homogeneous Catalytic CO 2 Photo/Electro-Conversion / Zhenguo Guo, Houjuan Yang -- High-Entropy Alloys for CO 2 Photo/Electro-Conversion / Fengqi Wang, Pei Liu, Yuchen Qin -- Semiconductor Composite Materials for Photocatalytic CO 2 Reduction / Shengyao Wang, Bo Jiang -- Carbon-Based Materials for CO 2 Photo/Electro-Conversion / Qing Qin, Lei Dai -- Metal- CO 2 Batteries: Novel Routes for CO 2 Utilization / Xiangyu Zhang, Le Yu -- CO 2 Conversion into Long-Chain Compounds / Tingting Zheng, Chuan Xia -- Conclusions and Perspectives / Haiqing Wang -- Index