Browsing NTNU Open by Author "Wang, Rongfang"
Now showing items 1-19 of 19
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A Highly-Efficient and Stable Catalyst based on Co(OH)2@Ni Electroplated on Cu-Metallized Cotton Textile for Water Splitting
Wang, Zining; Ji, Shan; Liu, Fusheng; Wang, Hui; Wang, Xuyun; Wang, Qizhao; Pollet, Bruno; Wang, Rongfang (Journal article; Peer reviewed, 2019)The concept of using renewable energy to power water electrolyzers is seen as a favorable approach for the production of green and sustainable hydrogen. The electrochemical water splitting can be significantly and efficiently ... -
Achieving highly practical capacitance of MnO2 by using chain-like CoB alloy as support
Yan, Jingjing; Wang, Hui; Ji, Shan; Pollet, Bruno; Wang, Rongfang (Journal article; Peer reviewed, 2018)The practical performance of MnO2 as a capacitor material is limited mainly by its poor electronic conductivity. Arranging MnO2 on the conductive backbone to form a unique hierarchical nanostructure is an efficient way to ... -
Engineered porous Ni2P-nanoparticle/Ni2P-nanosheet arrays via the Kirkendall effect and Ostwald ripening towards efficient overall water splitting
Wu, Yutai; Wang, Hui; Ji, Shan; Pollet, Bruno; Wang, Xuyun; Wang, Rongfang (Peer reviewed; Journal article, 2020)Transitional metal phosphides with array-like structure grown on conductive support materials are promising bifunctional catalysts for the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER). In this ... -
Enhanced Cycleability of Amorphous MnO2 by Covering on α-MnO2 Needles in an Electrochemical Capacitor
Liu, Quanbing; Ji, Shan; Yang, Juan; Wang, Hui; Pollet, Bruno; Wang, Rongfang (Journal article; Peer reviewed, 2017)An allomorph MnO2@MnO2 core-shell nanostructure was developed via a two-step aqueous reaction method. The data analysis of Scanning Electron Microscopy, Transmission Electron Microscopy, X-Ray Diffraction and N2 ... -
Hierarchical core-shell structured CoNi2S4/Ni3S2@Ni(OH)2 nanosheet arrays as electrode for electrochemical energy storage
Chen, Fangshuai; Wang, Hui; Ji, Shan; Pollet, Bruno; Wang, Rongfang (Journal article; Peer reviewed, 2019)Herein, hierarchical core-shell structured CoNi2S4/Ni3S2@Ni(OH)2 nanosheet arrays are synthesized through a facile method. The electrochemical results show that combining CoNi2S4/Ni3S2 nanosheet arrays (as core) with Ni(OH)2 ... -
Highly active porous Co–B nanoalloy synthesized on liquid-gas interface for hydrolysis of sodium borohydride
Wang, Xingpu; Liao, Jinyun; Li, Hao; Wang, Hui; Wang, Rongfang; Pollet, Bruno; Ji, Shan (Journal article; Peer reviewed, 2018)Porous Co–B nanoalloy is a low-cost and highly active catalyst towards the hydrolysis of sodium borohydride (NaBH4). In this study, a facile and room-temperature hydrogen bubble-assisted method was developed to prepare ... -
A highly efficient water electrolyser cell assembled by asymmetric array electrodes based on Co, Fe-doped Ni(OH)2 nanosheets
Wu, Yutai; Ji, Shan; Pollet, Bruno; Wang, Xuyun; Wang, Rongfang (Peer reviewed; Journal article, 2020)Hydrogen is an “ideal” clean sustainable energy source if it is produced via water electrolyser using power generated by renewable energy systems (RES) such as solar panels and wind turbines. In this study, cobalt (Co) and ... -
Hollow core-shell structured Cu2O@Cu1.8S spheres as novel electrode for enzyme free glucose sensing
Cao, Miaomiao; Wang, Hui; Ji, Shan; Zhao, Qian; Pollet, Bruno; Wang, Rongfang (Journal article; Peer reviewed, 2019)This study reports a novel hollow Cu2O@Cu1.8S material used as a catalyst for enzyme free glucose detection. Cu2O@Cu1.8S is successfully synthesized by a facile in-situ growth method. The obtained Cu2O@Cu1.8S exhibits a ... -
Mesoporous CoS/ N‐doped Carbon as HER and ORR Bifunctional Electrocatalyst for Water Electrolysers and Zinc‐Air Batteries
Ding, Jieting; Ji, Shan; Wang, Hui; Pollet, Bruno; Wang, Rongfang (Journal article; Peer reviewed, 2018)Hydrogen evolution reaction (HER) and oxygen reduction reaction (ORR) are two critical electrocatalytic reactions, involved in many sustainable and green electrochemical energy conversion and storage technologies. Transition ... -
Mesoporous CoS/ N‐doped Carbon as HER and ORR Bifunctional Electrocatalyst for Water Electrolysers and Zinc‐Air Batteries
Ding, Jieting; Wang, Hui; Pollet, Bruno; Wang, Rongfang (Journal article; Peer reviewed, 2018)Hydrogen evolution reaction (HER) and oxygen reduction reaction (ORR) are two critical electrocatalytic reactions, involved in many sustainable and green electrochemical energy conversion and storage technologies. Transition ... -
MnO/N-doped Mesoporous Carbon as Advanced Oxygen Reduction Reaction Electrocatalyst for Zinc-air Batteries
Ding, Jieting; Ji, Shan; Wang, Hui; Brett, Dan J L; Pollet, Bruno; Wang, Rongfang (Journal article; Peer reviewed, 2018)The development of alternative electrocatalysts exhibiting high activity in the oxygen reduction reaction (ORR) is vital for the deployment of large‐scale clean energy devices, such as fuel cells and zinc–air batteries. ... -
MOF derived graphitic carbon nitride/oxygen vacancies-rich zinc oxide nanocomposites with enhanced supercapacitive performance
Shen, Jiaqi; Wang, Peng; Jiang, Huasheng; Wang, Hui; Pollet, Bruno; Wang, Rongfang; Ji, Shan (Peer reviewed; Journal article, 2020)Supercapacitors with high power density and durability have shown enormous potential for smart electronics. Herein, a novel graphitic carbon nitride (g-C3N4) coated with oxygen vacancies-rich ZnO (OZCN) nanocomposites was ... -
Multidimensional regulation of Ni3S2@Co(OH)2 catalyst with high performance for wind energy electrolytic water
Wang, Zining; Wang, Hui; Ji, Shan; Wang, Xuyun; Pollet, Bruno; Wang, Rongfang (Journal article; Peer reviewed, 2019)Combining renewable energy technologies with water electrolyzers to produce green hydrogen should provide a very promising strategy for future sustainable and pollution-free energy supply. In this study, 3-D Ni3S2@Co(OH)2 ... -
N-doped porous transition metal-based carbon nanosheet networks as multifunctional electrocatalyst for rechargeable zinc-air batteries
Ding, Jieting; Ji, Shan; Wang, Hui; Gai, Hengjun; Liu, Fusheng; Pollet, Bruno; Wang, Rongfang (Journal article; Peer reviewed, 2019)The development of cost-effective and highly efficient multi-functional oxygen reduction reaction and oxygen evolution reaction catalysts has attracted much research attention due to their great potential applications in ... -
Nano-engineering PdNi networks by voltammetric dealloying for ethanol oxidation
Ding, Jieting; Ji, Shan; Wang, Hui; Pollet, Bruno; Wang, Rongfang (Journal article; Peer reviewed, 2018)PdNi particle networks (PdNi NN) are prepared by voltammetric dealloying using catkin-like PdNi nanoparticles as precursor. It is found that voltammetric dealloying plays an important role for the formation of these networks. ... -
Tailoring nanopores within nanoparticles of PtCo networks as catalysts for methanol oxidation reaction
Ding, Jieting; Ji, Shan; Wang, Hui; Pollet, Bruno; Wang, Rongfang (Journal article; Peer reviewed, 2017)It has been recently reported that engineering the pores within alloy nanoparticles leads to improvement in the electrochemical activity of nanoparticle catalysts due to the enhanced electrochemical active surface areas. ... -
Toward high performance of zinc-air battery using hydrophobic carbon foam-based diffusion electrode
Chen, Yimai; Wang, Hui; Ji, Shan; Pollet, Bruno; Wang, Rongfang (Journal article; Peer reviewed, 2018)NaCl is used as template to form porous carbon during the carbonization procedure. It is found that the NaCl amount played an important role in the physical properties of hydrophobic carbon materials. When the current ... -
Tuning the extent of porosity and composition of N-doped carbon materials by NaNO3 and its effect on electrochemical activity
Chen, Y; Wang, H; Ji, Shan; Pollet, Bruno; Wang, Rongfang (Journal article; Peer reviewed, 2018)A facile one-pot method using NaNO3 as etching agent in a molten salt medium is developed to tune the porous structure and composition of N-doped carbon materials derived from biomass at high temperatures. SEM and TEM ... -
Ultra-high surface area and mesoporous N-doped carbon derived from sheep bones with high electrocatalytic performance toward the oxygen reduction reaction
Li, Shunxi; Xu, Ruoyu; Wang, Hui; Brett, Dan J L; Ji, Shan; Pollet, Bruno; Wang, Rongfang (Journal article; Peer reviewed, 2017)A nitrogen (N)-doped mesoporous carbon material exhibiting ultra-high surface area was successfully synthesized from sheep bones via a facile and low-cost method. The obtained carbon material had an ultra-high specific ...