【摘 要】
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The electroreduction of CO2 (CO2RR) into value-added chemicals is a sustainable strategy for mitigating global warming and managing the global carbon balance.However,developing an efficient and selective catalyst is still the central challenge.Here,we dev
【机 构】
：
School of Advanced Materials,Peking University Shenzhen Graduate School,Shenzhen 518055,China
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The electroreduction of CO2 (CO2RR) into value-added chemicals is a sustainable strategy for mitigating global warming and managing the global carbon balance.However,developing an efficient and selective catalyst is still the central challenge.Here,we developed a simple two-step pyrolysis method to con-fine low-valent Ni-based nanoparticles within nitrogen-doped carbon (Ni-NC).As a result,such Ni-based nanoparticles can effectively reduce CO2 to CO,with a maximum CO Faradaic efficiency (FE) of 98％ at an overpotential of 0.8V,as long as good stability.Experimental and the density functional theory (DFT)calculation results reveal that low-valent Ni plays a key role in activity and selectivity enhancement.This study presents a new understanding of Ni-based CO2RR,and provides a simple,scalable approach to the synthesis of low-valent catalysts towards efficient CO2RR.
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