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He Hongzhe

Bio: He Hongzhe is an academic researcher from Soochow University (Suzhou). The author has contributed to research in topics: Oxygen evolution & Overpotential. The author has an hindex of 2, co-authored 4 publications receiving 13 citations.

Papers
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Journal ArticleDOI
TL;DR: In this article, the authors summarized recent progress on silk-derived electrocatalysts, focusing on their preparation process and their application on water electrolysis and oxygen reduction reactions, and highlighted ideas of their preparation and their performance.

24 citations

Journal ArticleDOI
TL;DR: In this paper, cobalt and tungsten dual metal-loaded N-doped porous carbon electrocatalysts derived from silk fibroin were successfully prepared through facile carbonization and chemical activation by KCl and applied as efficient electro catalysts for hydrogen evolution reaction (HER) and oxygen evolution reaction(OER) for massively generate hydrogen energy by water splitting.
Abstract: Developing electrocatalysts with high efficiency and long-term stability for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) is significant to massively generate hydrogen energy by water splitting. In this work, cobalt and tungsten dual metal-loaded N-doped porous carbon electrocatalysts derived from silk fibroin were successfully prepared through facile carbonization and chemical activation by KCl and applied as efficient electrocatalysts for HER and OER. After chemical activation, the resulting catalysts present a unique hierarchical porous structure with micro-, meso-, and macropores, which is able to expose more implantation sites for catalytic active metals and will in turn promote the efficient diffusion of the electrolyte. The catalyst under the optimized condition (CoW@ACSF) has a specific area of 326.01 m2 g-1. The overpotential at a current density of 10 mA cm -2 of CoW@ACSF is 138.42 ± 10.39 mV toward HER and 492.05 ± 19.04 mV toward OER. Furthermore, the overpotential only increases 101.2 mV toward HER and 66.00 mV toward OER after the long-term stability test of chronopotentiometric test over 10 h, which confirms the excellent stability of the CoW@ACSF, owing to its unique carbon shell structure. This work gives an insight into the design and engineering of silk fibroin-derived carbon materials for electrocatalysis toward HER and OER.

16 citations

Journal ArticleDOI
TL;DR: In this article, a facile approach to synthesize N-doped porous carbon materials from silk fibroin by chemical activation of KCl was presented, and the as-prepared samples exhibit layer structure and morphology like sponge cakes.

13 citations

Patent
05 Feb 2021
TL;DR: In this paper, an electrostatic spinning porous carbon material and a preparation method of the preparation method are described, in which silk fibroin, polyoxyethylene, potassium chloride and anhydrous formic acid are taken for being uniformly mixed to obtain a spinning solution.
Abstract: The invention discloses an electrostatic spinning porous carbon material and a preparation method thereof. The preparation method of the electrostatic spinning porous carbon material comprises the following steps that silk fibroin, polyoxyethylene, potassium chloride and anhydrous formic acid are taken for being uniformly mixed to obtain a spinning solution; the spinning solution is subjected to electrostatic spinning to obtain an electrostatic spinning membrane, and the spinning voltage is 14-18kV; and high-temperature carbonization is carried out on the electrostatic spinning membrane in a nitrogen atmosphere to obtain the electrostatic spinning porous carbon material. The electrostatic spinning porous carbon material is prepared from a nitrogen element, and the content of the nitrogen element is 6-22 wt%. The preparation method of the electrostatic spinning porous carbon material is convenient to operate, the preparation process is easy to control, the technological process is short, and the obtained electrostatic spinning porous carbon material has good hydrophilic performance and pore structure.

Cited by
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Journal Article
TL;DR: In this article, B. mori silk fibroin films were studied thermally using temperature-modulated differential scanning calorimetry (TMDSC) to obtain the reversing heat capacity.
Abstract: We report a study of self-assembled beta-pleated sheets in B. mori silk fibroin films using thermal analysis and infrared spectroscopy. B. mori silk fibroin may stand as an exemplar of fibrous proteins containing crystalline beta-sheets. Materials were prepared from concentrated solutions (2−5 wt % fibroin in water) and then dried to achieve a less ordered state without beta-sheets. Crystallization of beta-pleated sheets was effected either by heating the films above the glass transition temperature (Tg) and holding isothermally or by exposure to methanol. The fractions of secondary structural components including random coils, alpha-helices, beta-pleated sheets, turns, and side chains were evaluated using Fourier self-deconvolution (FSD) of the infrared absorbance spectra. The silk fibroin films were studied thermally using temperature-modulated differential scanning calorimetry (TMDSC) to obtain the reversing heat capacity. The increment of the reversing heat capacity ΔCp0(Tg) at the glass transition fo...

837 citations

Journal ArticleDOI
TL;DR: In this article, the authors provide key fundamental knowledge of water electrolysis, progress, and challenges of the development of most-studied electrocatalysts in the most desirable electrolytic solutions: alkaline water electrolyisation (AWE), solidoxide electrolysis (SOE), and proton exchange membrane electrolysis(PEME).

156 citations

Journal ArticleDOI
TL;DR: In this paper, a review of the recent achievements of molecular metal nanoclusters employed in electrocatalytic processes, with particular elaboration on oxygen reduction reaction (ORR), hydrogen evolution reaction (HER), oxygen evolution reaction(OER), as well as to unravel the catalytic mechanism and establish the relationship between its structure and functionality.

40 citations

Journal ArticleDOI
TL;DR: In this article , Ni modified mesoporous Co2VO4 nanosheets with heterojunction structure is synthesized on nickel foam by hydrothermal and calcination method, which shows good activity for UOR (η10/500/1,000 = 1.28/1.45 V).

28 citations

Journal ArticleDOI
TL;DR: In this paper , various types of biomass-derived N-doped carbon materials with the combination of heteroatoms (H), transition metals, and conducting polymers are reviewed according to their roles in each application that includes fuel cells, water splitting, batteries, and supercapacitors.

19 citations