Journal ArticleDOI
Dianion Induced Electron Delocalization of Trifunctional Electrocatalysts for Rechargeable Zn–Air Batteries and Self‐Powered Water Splitting
Kuixing Ding,Jiugang Hu,Wei Jin,Liming Zhao,Yunpeng Liu,Zhonghua Wu,Baicheng Weng,Hongshuai Hou,Xiaobo Ji +8 more
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In this article , a trifunctional Ni(S0.51Se0.49)2@NC catalyst is designed and fabricated using a dianionic regulation strategy to enhance the adsorption of *OOH/*OH intermediate for ORR/OER and H* intermediate for HER.Abstract:
The development of low‐cost multifunctional electrocatalysts with high activity for the hydrogen evolution reaction (HER), oxygen evolution reaction (OER), and oxygen reduction reaction (ORR) is critical for the advancement of sophisticated energy conversion and storage devices. Herein, a trifunctional Ni(S0.51Se0.49)2@NC catalyst is designed and fabricated using a dianionic regulation strategy. Synchrotron radiation X‐ray absorption spectroscopy and density functional theory calculations reveal that simultaneous sulfidation and selenization can induce the electronic delocalization of Ni(S0.51Se0.49)2 active sites to enhance the adsorption of *OOH/*OH intermediate for ORR/OER and H* intermediate for HER. The OER and HER mechanisms are revealed by in situ Raman spectroscopy. The Ni(S0.51Se0.49)2@NC exhibits trifunctional catalytic activity for the HER (111 mV at 10 mA cm−2), OER (320 mV at 10 mA cm−2), and ORR (half‐wave potential of 0.83 V). The rechargeable zinc–air batteries (ZABs) exhibit an open‐circuit voltage of 1.46 V, a specific capacity of 799.1 mAh g−1, and excellent stability for 1000 cycles. The water electrolytic cell using Ni(S0.51Se0.49)2@NC electrodes delivers a current density of 10 mA cm−2 at a cell voltage of 1.59 V, and it can be powered using the constructed ZABs. These findings contribute to developing low‐cost and efficient non‐noble metal multifunctional catalysts.read more
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Insight into the bubble-induced overpotential towards high-rate charging of Zn-air batteries
TL;DR: In this paper , the bubble dynamics and the induced overpotential, including activation, ohmic, and concentration overpotentials, during high-rate charging are investigated based on a carbon-free electrode through in-situ observation, mathematical modelling, and numerical simulation.
Journal ArticleDOI
Robust Electronic Correlation of Co‐CoN4 Hybrid Active Sites for Durable Rechargeable Zn‐Air Batteries
Kuixing Ding,Jiugang Hu,Jia Luo,Liming Zhao,Wei Jin,Yunpeng Liu,Zhonghua Wu,Guoqiang Zou,Hongshuai Hou,Xiaobo Ji +9 more
TL;DR: In this paper , a facile coordination bridging strategy is proposed to construct bifunctional Co•CoN4 hybrid active sites embedded in porous N•rich carbon nanolamellas (denoted as Co•coN4@NCNs) for both the oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) for rechargeable Znair batteries.
Journal ArticleDOI
Oxygen and sulfur dual vacancies engineering on 3D Co3O4/Co3S4 heterostructure to improve overall water splitting activity
TL;DR: In this paper , a vacancy engineering strategy for electrochemical water splitting is proposed, which is a highly efficient approach to realize industrial hydrogen production, however, electrocatalysts suffer from low efficiency and high energy consumption.
Journal ArticleDOI
Fullerene Lattice‐Confined Ru Nanoparticles and Single Atoms Synergistically Boost Electrocatalytic Hydrogen Evolution Reaction
Tianmi Luo,Jianfeng Huang,Yu-Jia Hu,Cheng-Ming Yuan,Junsheng Chen,Liyun Cao,Koji Kajiyoshi,Yijun Liu,Yong-Qing Zhao,Zhenjiang Li,Yongqiang Feng +10 more
TL;DR: In this article , a lattice-confined in situ reduction effect of the 3D crystalline fullerene network (CFN) is developed to trap Ru nanoparticle (NP) and single atom (SA) via a solvothermal pyrolysis process.
Journal ArticleDOI
Regulating the Surface Electronic Structure of RuNi Alloys for Boosting Alkaline Hydrogen Oxidation Electrocatalysis
Xiaojuan Zhang,Zhiqiang Li,Xinpeng Sun,Lingzhi Wei,Helin Niu,Shanzhong Chen,Qianwang Chen,Changlai Wang,Fangcai Zheng +8 more
TL;DR: In this article , ruthenium (Ru) is introduced to regulate the surface electronic structure of Ni and optimize the Ni-H. The density functional theory (DFT) simulation and characterization results confirm that electron transfer from Ni to Ru causes the d-band center of Ni to shift down, weakening the hydrogen binding energy and hydroxyl binding energy, which synergistically contributes the enhanced HOR performance for the optimal RuNi@C-400 with a diffusion-limiting current density of 2.87 mA cm-2 and mass activity of 601 mA mg-1PGM at an overpotential of 50 mV, which is ∼ 1.20 and 7.90 times higher than that of Pt/C, respectively.
References
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Journal ArticleDOI
Advanced zinc-air batteries based on high-performance hybrid electrocatalysts
Yanguang Li,Ming Gong,Yongye Liang,Ju Feng,Ji-Eun Kim,Hailiang Wang,Guosong Hong,Bo Zhang,Hongjie Dai +8 more
TL;DR: Li et al. as mentioned in this paper constructed stable zinc-air batteries using novel catalysts for oxygen reduction and evolution reactions, but their realization is hampered by the lack of efficient and robust air catalysts.
Journal ArticleDOI
Tailoring the d-Band Centers Enables Co4N Nanosheets To Be Highly Active for Hydrogen Evolution Catalysis
Zhiyan Chen,Zhiyan Chen,Yao Song,Yao Song,Jinyan Cai,Xusheng Zheng,Dongdong Han,Yishang Wu,Yishang Wu,Yipeng Zang,Shuwen Niu,Yun Liu,Junfa Zhu,Xiaojing Liu,Gongming Wang +14 more
TL;DR: This work successfully endow Co4 N with prominent HER catalytic capability by tailoring the positions of the d-band center through transition-metal doping, which could provide valuable insights into the design of other catalysts for HER and beyond.
Journal ArticleDOI
Hierarchical MoS2/Polyaniline Nanowires with Excellent Electrochemical Performance for Lithium‐Ion Batteries
Journal ArticleDOI
Co2P–CoN Double Active Centers Confined in N-Doped Carbon Nanotube: Heterostructural Engineering for Trifunctional Catalysis toward HER, ORR, OER, and Zn–Air Batteries Driven Water Splitting
Yingying Guo,Pengfei Yuan,Jianan Zhang,Jianan Zhang,Huicong Xia,Fangyi Cheng,Mengfan Zhou,Jin Li,Yueyang Qiao,Shichun Mu,Qun Xu +10 more