An Active Hybrid Electrocatalyst with Synergized Pyridinic Nitrogen-Cobalt and Oxygen Vacancies for Bifunctional Oxygen Reduction and Evolution
有为 Bifunctional 氧减小和进化的 Synergized Pyridinic NitrogenCobalt 和氧空缺的活跃混合 Electrocatalyst作者机构：School of Materials Science and EngineeringInstitute of New Energy MaterialsTianjin UniversityTianjin 300072China
出 版 物：《Chinese Journal of Chemistry》 (中国化学（英文版）)
年 卷 期：2021年第39卷第3期
页 面：655-660页
核心收录：
学科分类：0808[工学-电气工程] 081705[工学-工业催化] 08[工学] 0817[工学-化学工程与技术]
基 金：the National Natural Stience Foundation of China(Nos.51822106 and 51572188)
主 题：Graphene Heterogeneous catalysis Electrochemistry Oxygen evolution reaction Oxygen reduction reaction
摘 要：Main observation and conclusion A hybrid bifunctional oxygen reduction reaction(ORR)/oxygen evolution reaction(OER)NiCo_(2)O_(4-x)/NLG with rich pyridinic-nitrogen-cobalt coordination and oxygen vacancies was synthesized via a combination of the hydrothermal method and pulsed laser ***_(2)O_(4-x)/NLG exhibits an excellent catalytic activity with a low overpotential of 290 mV at 10 ***^(-2)for OER and a high half-wave potential of 0.85 V for *** a result,the overall ORR/OER overpotential ofNiCo_(2)O_(4-x)/NLG is only 0.67 V in 1.0 mol/L KOH electrolyte,which is superior to commercial noble-metal-based catalysts(Pt/C+RuO2).It is evidenced that the enhanced intrinsic OER and ORR activities of NiCo_(2)O_(4-x)/NLG are attributed to a synergistic effect between the pyridinic-N-Co coordination and the oxy-gen *** work provides a new design strategy for enhancing the intrinsic activity of bifunctional ORR/OER electrocatalysts.
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