Journal ArticleDOI
MO-Co@N-Doped Carbon (M = Zn or Co): Vital Roles of Inactive Zn and Highly Efficient Activity toward Oxygen Reduction/Evolution Reactions for Rechargeable Zn–Air Battery
Biaohua Chen,Xiaobo He,Fengxiang Yin,Hao Wang,Hao Wang,Di-Jia Liu,Ruixing Shi,Jinnan Chen,Hongwei Yin +8 more
Reads0
Chats0
TLDR
In this paper, the MO-Co@N-doped carbon (NC, M = Zn or Co) is developed as a highly active ORR/OER bifunctional catalyst via pyrolysis of a bimetal metal-organic framework containing Zn and Co, i.e., precursor (CoZn).Abstract:
A highly efficient bifunctional oxygen catalyst is required for practical applications of fuel cells and metal–air batteries, as oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) are their core electrode reactions. Here, the MO-Co@N-doped carbon (NC, M = Zn or Co) is developed as a highly active ORR/OER bifunctional catalyst via pyrolysis of a bimetal metal–organic framework containing Zn and Co, i.e., precursor (CoZn). The vital roles of inactive Zn in developing highly active bifunctional oxygen catalysts are unraveled. When the precursors include Zn, the surface contents of pyridinic N for ORR and the surface contents of Co–Nx and Co3+/Co2+ ratios for OER are enhanced, while the high specific surface areas, high porosity, and high electrochemical active surface areas are also achieved. Furthermore, the synergistic effects between Zn-based and Co-based species can promote the well growth of multiwalled carbon nanotubes (MWCNTs) at high pyrolysis temperatures (≥700 °C), which is favorable for charge transfer. The optimized CoZn-NC-700 shows the highly bifunctional ORR/OER activity and the excellent durability during the ORR/OER processes, even better than 20 wt% Pt/C (for ORR) and IrO2 (for OER). CoZn-NC-700 also exhibits the prominent Zn–air battery performance and even outperforms the mixture of 20 wt% Pt/C and IrO2.read more
Citations
More filters
Journal ArticleDOI
MOF-derived electrocatalysts for oxygen reduction, oxygen evolution and hydrogen evolution reactions
TL;DR: A wide range of applications based on these materials for ORR, OER, HER and multifunctional electrocatalysis are discussed, with an emphasis on the required features of MOF-derived carbon-based materials for the Electrocatalysis of corresponding reactions.
Journal ArticleDOI
Advanced Architectures and Relatives of Air Electrodes in Zn-Air Batteries.
TL;DR: A perspective for design, preparation, and assembly of air electrodes is proposed for the future innovations of Zn–air batteries with high performance.
Journal ArticleDOI
Nanostructured Co-based bifunctional electrocatalysts for energy conversion and storage: current status and perspectives
TL;DR: In this article, the fundamental mechanisms of the bifunctional electrocatalysis of ORR/OER and OER/HER are introduced and analyzed, and recent progress in the design, synthesis and emerging applications of nonnoble cobalt (Co)-based materials (e.g., cobalt oxide, cobalt phosphides and cobalt chalcogenides), including layered double hydroxides, Co N-C, Co-N-C and Co-based single atoms and their composites, are summarized and discussed.
Journal ArticleDOI
Recent Development of Zeolitic Imidazolate Frameworks (ZIFs) Derived Porous Carbon Based Materials as Electrocatalysts
Journal ArticleDOI
Decorating Co/CoNx nanoparticles in nitrogen-doped carbon nanoarrays for flexible and rechargeable zinc-air batteries
Cao Guan,Afriyanti Sumboja,Wenjie Zang,Yuhong Qian,Hong Zhang,Ximeng Liu,Zhaolin Liu,Dan Zhao,Stephen J. Pennycook,John Wang +9 more
TL;DR: In this paper, the authors synthesize unique hybrid cobalt/cobalt nitride (Co/CoNx) nanoparticles well-integrated with nitrogen-doped carbon (NC) nanoarrays through a facile fabrication using a two-dimensional metal-organic framework (MOF) precursor.
References
More filters
Journal ArticleDOI
Nickel nitride as an efficient electrocatalyst for water splitting
Menny Shalom,Debora Ressnig,Xiaofei Yang,Guylhaine Clavel,Tim-Patrick Fellinger,Markus Antonietti +5 more
TL;DR: In this article, a simple method to fabricate nickel nitride (Ni3N) on nickel (Ni) foam for electrocatalytic applications is presented. But the Ni3N/Ni-foam exhibits extremely low overpotential (∼50 mV), high current density and excellent stability for the hydrogen evolution reaction (HER) in alkaline solution.
Journal ArticleDOI
Ordered mesoporous cobalt oxide as highly efficient oxygen evolution catalyst.
TL;DR: Under a strong acidic environment, a high turnover frequency (TOF) of ~2.2 × 10(-3) s(-1) per Co atom was achieved, which is more than twice the TOF of traditional hard-templated, mesoporous Co3O4.
Journal ArticleDOI
Electrocatalytic Measurement Methodology of Oxide Catalysts Using a Thin-Film Rotating Disk Electrode
TL;DR: In this paper, a methodology was developed to compare the ORR activities of submicrometer-sized transition-metal oxides, and the projection of LaNiO 3 in the actual fuel cell cathode was presented, which was shown to be competitive with current platinum-based cathodes.
Journal ArticleDOI
Toward Full Exposure of “Active Sites”: Nanocarbon Electrocatalyst with Surface Enriched Nitrogen for Superior Oxygen Reduction and Evolution Reactivity
TL;DR: In this paper, a N-doped carbon coaxial nanocables with pristine carbon nanotubes (CNTs) as the core and the carbon layers as the shell are proposed.
Journal ArticleDOI
Polydopamine-Inspired, Dual Heteroatom-Doped Carbon Nanotubes for Highly Efficient Overall Water Splitting
Konggang Qu,Konggang Qu,Yao Zheng,Yan Jiao,Xianxi Zhang,Sheng Dai,Shi-Zhang Qiao,Shi-Zhang Qiao +7 more
TL;DR: In this article, the authors devise a facile synthesis of nitrogen and sulfur dual-doped carbon nanotubes with in situ, homogenous and high concentration sulfur doping for hydrogen evolution reaction and oxygen evolution reaction.