Nitrogen‐doped Zn–Ni oxide for electrochemical reduction of carbon dioxide in sea water
Shuai Zhang, Xintong Gao, Peng‐Fei Hou, Tierui Zhang, Peng Kang
Abstract
Abstract Nitrogen‐doped Zn–Ni oxide nanoparticles prepared by ammonia treatment are efficient electrocatalysts for CO 2 reduction to CO. The single‐phase nanostructures of N‐Zn–Ni oxide nanoparticles exhibited high electrocatalytic CO 2 reduction activity with CO Faradaic efficiency of 91.5% and partial current density of 3.2 mA·cm −2 at − 0.95 V (vs. reversible hydrogen electrode‚ RHE) in NaCl aqueous solution. Furthermore‚ N‐Zn–Ni oxides catalyst achieved CO Faradaic efficiency over 89% at − 0.8 V (vs. RHE) in natural seawater‚ much better than the CO 2 reduction activity of benchmark Ag/C catalysts in seawater‚ and demonstrated strong tolerance to several metal ion impurities with retained CO selectivity. The notable reactivity toward CO 2 reduction and contamination‐tolerance is attributed to peculiar synergistic effect from binary Zn–Ni oxide and nitrogen doping.