Highly active oxygen evolution integrated with efficient CO <sub>2</sub> to CO electroreduction

Yongtao Meng(Shandong University of Science and Technology), Xiao Zhang(Southern University of Science and Technology), Wei‐Hsuan Hung(National Central University), Junkai He(University of Connecticut), Yi-Sheng Tsai(National Central University), Yun Kuang(Stanford University), Michael J. Kenney(Stanford University), Jing‐Jong Shyue(Research Center for Applied Science, Academia Sinica), Yijin Liu(SLAC National Accelerator Laboratory), Kevin H. Stone(SLAC National Accelerator Laboratory), X. R. Zheng(Stanford University), Steven L. Suib(University of Connecticut), Meng‐Chang Lin(Shandong University of Science and Technology), Yongye Liang(Southern University of Science and Technology), Hongjie Dai(Stanford University)
Proceedings of the National Academy of Sciences
November 13, 2019
10.1073/pnas.1915319116
Cited by 80Open Access
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Abstract

Significance Electrochemical reduction of CO 2 to useful chemicals or fuels is critical to closing the carbon cycle and preventing further deterioration of the environment/climate. This work addresses the low-energy-efficiency problem of CO 2 reduction limited by sluggish oxygen evolution reaction (OER) on the anode side. The only active OER catalysts for coupling CO 2 reduction in neutral conditions are based on noble metals such as Ir, Ru, and gold. Herein, we developed a nonprecious-metal-based OER anode with higher activity and stability than those based on noble-metal catalysts IrO 2 and Ir/C. We integrated our anode with a selective CO 2 reduction cathode to achieve &gt;97% conversion of CO 2 to CO and a record-setting high energy efficiency for CO 2 conversion.

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