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| 1 | 硒化钌复合碳纳米纤维的制备及其电催化析氢性能显示文摘为提高硒化钌(RuSe_(2))催化剂的活性位点数量、导电性和传质扩散能力,采用静电纺丝、碳化和硒化相结合的策略,制备了负载RuSe_(2)纳米颗粒的N掺杂碳纳米纤维复合材料(RuSe_(2)@CNFs)。利用SEM、TEM、XRD、Raman、XPS等表征技术对该复合材料的组成和结构进行系统表征,并通过LSV、CV、恒电位电解等电化学技术对该复合材料的电催化析氢性能和稳定性进行测试分析。结果表明:RuSe_(2)@CNFs具有丰富的催化活性位点、良好的导电性以及充足的电解液/气体传输孔道,展现出优异的电催化性能和稳定性,在碱性电解液中产生10 mA/cm^(2)的催化电流密度仅需58 mV的过电位,优于大部分近期报道的Ru基催化剂。该研究为高活性析氢催化剂的设计合成提供了新的研究思路。 | 韦悦 王晟 纪律律 | 2022 | 浙江理工大学学报(自然科学版)2022，47，4： | 1 |
| 2 | Co/NiCoP纳米异质结构催化剂的构建及其析氢性能显示文摘开发价格便宜、高效稳定的析氢反应(HER)电催化剂是实现电解水制氢技术工业规模化的关键问题之一。本文利用低温电化学沉积法成功地在碳布表面原位生长了Co/NiCoP异质纳米结构的自支撑催化电极,结合表征技术、以1mol/LNaOH溶液为碱性电解质的理论计算和以三电极体系电化学工作站为基础的实验测试对该材料进行了HER性能评估。结果表明,Co/NiCoP异质结构催化剂具有优异的析氢性能,在碱性介质中,获取10mA/cm^(2)的催化电流密度所需要的过电位仅为54mV,Tafel斜率为78.5mV/dec。这主要归因于:①Co/NiCoP纳米催化剂在碳布表面良好的分散性增加了暴露的催化活性位点数;②异质结构的存在促进了Co与NiCoP之间电子的相互作用,加快了电荷转移速率并提高了材料的导电性;③理论计算表明,Co/NiCoP异质结构的构建能有效地降低水的解离势垒,促进水的解离,进而加快HER动力学反应过程。因此,Co/NiCoP纳米异质结构催化剂的构建丰富了非贵金属纳米材料在电解水制氢领域的应用。 | 姜楠 李佳优 蒋博龙 高伟俊 谭明 | 2023 | 化工进展2023，42，12： | 0 |
| 3 | 温度调控合成异质结构Ru-Ru_(2)P纳米颗粒负载碳纳米纤维用于高效电催化析氢反应显示文摘开发高效、低价、稳定的析氢催化剂是实现电解水制氢规模产业化的关键,但仍面临巨大挑战.在本文中,我们通过静电纺丝和控温热处理的合成路径制备了一种高活性Ru基催化剂材料,该催化剂由异质结构Ru-Ru_(2)P纳米颗粒均匀负载于N、P共掺杂碳纳米纤维构成.所制备的Ru-Ru_(2)P异质催化剂表现出优异的电催化析氢活性,在酸性和碱性电解液中产生10 mA cm^(−2)的催化电流密度分别仅需11和14 mV的过电位,其性能优于对比样品纯Ru和纯Ru_(2)P催化剂.密度泛函理论计算结果表明在Ru和Ru_(2)P的异质界面处存在电子耦合效应,从而有效调控催化剂界面电子结构,优化活性位点氢吸附能并提高导电性,实现了高效电催化析氢.本合成策略适用于制备一系列过渡金属磷化物纳米纤维,因而在催化和储能等领域具有广泛的应用前景. | 韦悦 徐杲 韦渝洁 纪律律 王騊 刘准 王晟 | 2022 | Science China Materials2022，65，10： | 0 |
| 4 | Ru-doped functional porous materials for electrocatalytic water splitting显示文摘Electrolytic water splitting(EWS)is an attractive and promising technique for the production of hydrogen energy.Nevertheless,the sluggish kinetic rate of hydrogen/oxygen evolution reactions leads to a high overpotential and low energy efficiency.Up to date,Pt/Ir-based nanocatalysts have become the state-of-the-art EWS catalysts,but disadvantages such as high cost and low earth abundance greatly limit their applications in EWS devices.As an attractive candidate for the Pt/Ir catalysts,series of Ru-based nanomaterials have aroused much attention for their low price,Pt-like hydrogen bond strength,and high EWS activity.In particular,Ru-doped functional porous materials have been becoming one of the most representative EWS catalysts,which can not only achieve the dispersion and adjustment for active Ru sites,but also simultaneously solve the problems of mass transfer and catalytic conversion in EWS.In this review,the design and preparation strategies of Ru-doped functional porous materials toward EWS in recent years are summarized,including Ru-doped metal organic frameworks(MOFs),Ru-doped porous organic polymers(POPs),and their derivatives.Meanwhile,detailed structure–activity relationships induced by the tuned geometric/electronic structures of Ru-doped functional porous materials are further depicted in this review.Last but not least,the challenges and perspectives of Ru-doped functional porous materials catalysts are reasonably proposed to provide fresh ideas for the design of Ru-based EWS catalysts. | Chongao Tian Rui Liu Yu Zhang Wenxiu Yang Bo Wang | 2024 | Nano Research2024，17，3： | 0 |
| 5 | Precisely Control Relationship between Sulfur Vacancy and H Absorption for Boosting Hydrogen Evolution Reaction显示文摘Ef fective and robust catalyst is the core of water splitting to produce hydrogen.Here, we report an anionic etching method to tailor the sulfur vacancy(VS) of NiS_(2) to further enhance the electrocatalytic performance for hydrogen evolution reaction(HER). With the VS concentration change from 2.4% to 8.5%, the H* adsorption strength on S sites changed and NiS_(2)-VS 5.9% shows the most optimized H* adsorption for HER with an ultralow onset potential(68 m V) and has long-term stability for 100 h in 1 M KOH media. In situ attenuated-total-reflection Fourier transform infrared spectroscopy(ATR-FTIRS) measurements are usually used to monitor the adsorption of intermediates. The S-H* peak of the Ni S_(2)-VS 5.9% appears at a very low voltage, which is favorable for the HER in alkaline media. Density functional theory calculations also demonstrate the Ni S_(2)-VS 5.9% has the optimal |ΔG^(H*)| of 0.17 e V. This work offers a simple and promising pathway to enhance catalytic activity via precise vacancies strategy. | Jing Jin Xinyao Wang Yang Hu Zhuang Zhang Hongbo Liu Jie Yin Pinxian Xi | 2024 | Nano-Micro Letters2024，16，4： | 0 |
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